Contents

Features .............................................................................................. 1
Pin Assignment.................................................................................... 1
Pin Functions ....................................................................................... 1
Block Diagram ..................................................................................... 2
Instruction Set...................................................................................... 2
Absolute Maximum Ratings ................................................................. 2
Recommended Operationg Conditions ................................................ 3
Pin Capacitance................................................................................... 3
Endurance ........................................................................................... 3
DC Characteristics ............................................................................... 4
AC Characteristics ............................................................................... 5
Operation ............................................................................................. 6
Receiving a Start-Bit ............................................................................ 9
Three-wire Interface(DI-DO direct connection)..................................... 9
Connecting to CPU with a Serial Port .................................................. 10
Characteristics ..................................................................................... 11
Ordering Information ............................................................................ 16
Dimensions .......................................................................................... 17

Seiko Instruments Inc.

The S-29X90A Series is high speed, low power 1K/2K/4K-bit serial
E

PROM with a wide operating voltage range. They are organized as

64-word

16-bit, 128-word

16-bit and 256-word

16-bit, respectively.

Each is capable of sequential read, where addresses are automatically
incremented for each 16-bit block.
Interface is structured so that this IC can be directly connected to the
CPU with serial ports. 8-bit instructions make it easy to prepare your
own software.

Pin Assignment

Pin Functions

Table 1

Pin Number

Name

DIP

SOP1

Function

Chip select input

Serial clock input

Serial data input

Serial data output

GND

Ground

TEST

Test:

Normally kept open

(can also be connected to GND or Vcc)

No Connection

Power supply

CMOS SERIAL E

PROM

S-29X90A Series

Figure 1

Features

Low power consumption

Standby

: 1.0

A Max.

(Vcc=6.5 V)

Operating : 0.8 mA Max. (Vcc=5.5 V)

0.4 mA Max. (Vcc=2.5 V)

Wide operating voltage range

Write

: 2.5 to 6.5 V

Read

: 1.8 to 6.5 V

Sequential read capable

Can be easily connected to the serial port

Endurance : 10

cycles/word

Data retention : 10 years

S-29190A : 1 Kbits

S-29290A : 2 Kbits

S-29390A : 4 Kbits

8-pin SOP1

Top view

8-pin DIP

Top view

GND

TEST

S-29190ADP

S-29290ADP

S-29390ADP

S-29190AFJ

S-29290AFJ

S-29390AFJ

differs depending on the package type :

A : A type, (blank) : B type
See

Dimensions.

Rev.1.1

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Block Diagram

Instruction Set

Table 2

Address

Instruction

Start

Bit

Ope

code

S-29190A

S-29290A

S-29390A

Data

READ (Read data)

1000xxx

xx A5 to A0

x A6 to A0

A7 to A0

to D

Output*

PROGRAM

(Program data)

x 100 xxx

xx A5 to A0

x A6 to A0

A7 to A0

to D

Input

WRAL (Write all)

0001xxx

xxxxxxxx

to D

Input

ERAL (Erase all)

0010xxx

xxxxxxxx

PEN

(Program enable)

0011xxx

xxxxxxxx

PDS

(Program disable)

0000xxx

xxxxxxxx

x: Doesn't matter.

* : When 16-bit data of the specified address is output, the data of the next address is output.

Absolute Maximum Ratings

Parameter

Symbol

Ratings

Unit

Power supply voltage

-0.3 to +7.0

Input voltage

-0.3 to V

+0.3

Output voltage

OUT

-0.3 to V

Storage temperature under bias

bias

-50 to +95

°C

Storage temperature

stg

-65 to +150

°C

Figure 2

Data register

Address

decoder

Mode decode

logic

Clock generator

Output buffer

GND

Memory array

Table 3

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Recommended Operating Conditions

Table 4

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Read Operation

Write Enable/Disable

1.8

6.5

Power supply voltage

Write Operation

2.5

6.5

High level input voltage

=5.5 to 6.5 V

=4.5 to 5.5 V

=2.7 to 4.5 V

=1.8 to 2.7 V

0.8

Vcc

2.0

0.8

Vcc

0.8

Vcc

Low level input voltage

=5.5 to 6.5 V

=4.5 to 5.5 V

=2.7 to 4.5 V

=1.8 to 2.7 V

0.0

0.2

Vcc

0.8

0.2

Vcc

0.15

Vcc

Operating temperature

opr

-40

+85

°C

Pin Capacitance

Table 5

(Ta=25°C, f=1.0 MHz, V

=5 V)

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Input Capacitance

=0 V

Output Capacitance

OUT

=0 V

Endurance

Table 6

Parameter

Symbol

Min.

Typ.

Max.

Unit

Endurance

cycles/word

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

DC Characteristics

=5.5 V to 6.5

=4.5 to 5.5

=2.5 to 4.5

=1.8 to 2.5 V

Parameter

Smbl

Conditions

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Min.

Typ.

Max.

Unit

Current

consumption

(READ)

CC1

unloaded

1.0

0.8

0.6

0.4

Current

consumption

(PROGRAM)

CC2

unloaded

2.5

2.0

1.5

=4.5 V to 6.5 V

=2.5 to 4.5 V

=1.8 to 2.5 V

Parameter

Smbl

Conditions

Min.

Typ. Max.

Min.

Typ. Max.

Min.

Typ. Max.

Unit

Standby current

consumption

CS=GND DO=Open

Other input: Connected to

or GND

1.0

0.6

0.4

Input leakage

current

=GND to V

0.1

1.0

0.1

1.0

0.1

1.0

Output leakage

current

OUT

=GND to V

0.1

1.0

0.1

1.0

0.1

1.0

=2.1 mA

0.45

Low level output

voltage

=100

0.1

=-400

2.4

=-100

0.7

High level output

voltage

=-10

0.7

0.3

Write enable latch

data hold voltage

Only when program disable

mode

1.5

Table 7

Table 8

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

AC Characteristics

Table 9 Measuring conditions

Input pulse voltage

0.1

to 0.9

Output reference voltage

0.5

Output load

100pF

Table 10

=4.5 to 6.5V

=2.5 to 4.5 V

=1.8 to 2.5V

Parameter

Smbl

Min. Typ. Max. Min. Typ. Max. Min.

Typ. Max.

Unit

CS setup time

CSS

0.2

0.4

1.0

CS hold time

CSH

0.2

0.4

1.0

CS deselect time

CDS

0.2

0.4

Data setup time

0.2

0.4

0.8

Data hold time

0.2

0.4

0.8

Output delay time

0.4

1.0

2.0

Clock frequency

2.0

0.5

0.25 MHz

Clock pulse width

SKH

SKL

0.25

1.0

2.0

Output disable time

HZ1

HZ2

0.15

0.5

1.0

Output enable time

0.15

0.5

1.0

Programming time

4.0

10.0

4.0

10.0

Figure 3 Timing Chart

Input data is retrieved on the rising edge of SK.

Output data is triggered on the falling edge of SK.

SKH

CDS

CSS

Valid data

SKL

HZ2

CSH

HZ1

Hi-Z

(READ)

(VERIFY)

Hi-Z

Figure 4 Timing Chart for t

CSS

and t

CSH

when SK is "H"

CSS

CSH

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Operation

Instructions (in the order of start-bit, instruction, address, and data) are latched to DI in synchronization with the rising

edge of SK after CS goes high. A start-bit can only be recognized when the high of DI is latched at the rising edge of

SK after changing CS to high, it is impossible for it to be recognized as long as DI is low, even if there are SK pulses

after CS goes high. Instruction finishes when CS goes low, where it must be low between commands during t

CDS

All input, including DI and SK signals, is ignored while CS is low, which is stand-by mode. The start bit + instruction,

address, and data are 8-bit instructions. This makes it easy to prepare your own software using a serial interface

incorporated into the CPU.

1. READ

The READ instruction reads data from a specified address. After A0 is latched at the rising edge of SK, 16-bit data is

continuously output in synchronization with the falling edge of SK.

When all of the data (D

to D

) in the specified address has been read, data in the next address can be read with the

input of another SK clock. Thus, the data over whole area of the memory can be read by continuously inputting SK

clocks as long as CS is high.

The last address (An ... A1 A0 = 1 ... 11) rolls over to the top address (An ... A1 A0 = 0 ... 00).

Hi-Z

C S

S K

D I

D O

Figure 5 Read Timing (S-29390A)

On the S-29190A, A

and A

are optional.

On the S-29290A, A

is optional.

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Write (PROGRAM ,WRAL, ERAL)

The write instructions (PROGRAM, WRAL, ERAL) automatically begins writing to the non-volatile memory when CS

goes low at the completion of the specified clock input.

The write operation is completed in 10 ms (t

Max.), and the typical write period is less than 5 ms. In the S-29X90A

Series, it is easy to VERIFY the completion of the write operation in order to minimize the write cycle by setting CS to

high and checking the DO pin, which is low during the write operation and high after its completion. This VERIFY

procedure can be executed over and over again. There are two methods to detect a change in the DO output. One is

to detect a change from low to high setting CS to high, and the other is to detect a change from low to high as a result

of repetitous operations of returning the CS to low after setting CS to high and checking the DO output.

Because all SK and DI inputs are ignored during the write operation, any input of instruction will also be disregarded.

When DO outputs high after completion of the write operation or if it is in the high-impedance state (Hi-Z), the input of

instructions is available. Even if the DO pin remains high, it will enter the high-impedance state upon the recognition of

a high of DI (start-bit) attached to the rising edge of an SK pulse.

DI input should be low during the VERIFY procedure.

2.1 PROGRAM

This instruction writes 16-bit data to a specified address.

After changing CS to high, input a start-bit, op-code (PROGRAM), address, and 16-bit data. If there is a data overflow

of more than 16 bits, only the last 16-bits of the data is considered valid. Changing CS to low will start the PROGRAM

operation. It is not necessary to make the data "1" before initiating the PROGRAM operation.

CDS

busy

ready

D15

Hi-Z

HZ1

A6*

A7*

ready

VERIFY

Figure 6 WRITE Timing (S-29390A)

On the S-29190A, A

and A

are optional.

On the S-29290A, A

is optional.

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

2.2 Write all (WRAL)

This instruction writes the same 16-bit data into every address.
After changing CS to high, input a start-bit, op-code (WRAL), address (optional), and 16-bit data. If there is a data
overflow of more than 16 bits, the write data is shifted for every clock in succession and only the last 16-bit data is
valid. Changing CS to low starts the WRAL operation. It is not necessary to make the data "1" before initiating the
WRAL operation.

Hi-Z

D15

Hi-Z

HZ1

ready

busy

CDS

VERIFY

Standby

Figure 7

WRAL Timing

2.3 Erase all (ERAL)

This instruction erases the data in every address. All data changes to "1."
After changing CS to high, input a start-bit, op-code (ERAL), and address (optional) . It is not necessary to input data.
Changing CS to low starts the ERAL operation.

3. Write enable (PEN) and Write disable (PDS)

The PEN instruction puts the S-29X90A Series into write enable mode, which accepts PROGRAM, WRAL, and ERAL
instruction. The PDS instruction puts the S-29X90A Series into write disable mode, which refuses PROGRAM,
WRAL, and ERAL instruction.

The S-29X90A Series powers on in write disable mode, which protects data against unexpected, erroneous write
operations caused by noise and/or CPU malfunctions. It should be kept in write disable mode except when
performing write operations.

Figure 8

ERAL Timing

Hi-Z

HZ1

ready

busy

CDS

VERIFY

Standby

Figure 9 PEN/PDS Timing

11=PEN
00=PDS

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Receiving a Start-Bit

Three-Wire Interface (DI-DO direct connection)

A start-bit can be recognized by latching the high level of DI at the rising edge of SK after changing CS to high
(Start-Bit Recognition). The write operation begins by inputting the write instruction and setting CS to low. The DO
pin then outputs low during the write operation and high at its completion by setting CS to high (Verify Operation).
Therefore, only after a write operation, in order to accept the next command by having CS go high, the DO pin is
switched from a state of high-impedance to a state of data output; but if it recognizes a start-bit, the DO pin returns
to a state of high-impedance (see Figure 3).

Make sure that data output from the CPU does not interfere with the data output from the serial memory IC when
you configure a 3-wire interface by connecting DI input pin and DO output pin. Such interference may cause a start-
bit fetch problem.

Although the normal configuration of a serial interface is a 4-wire interface to CS, SK, DI, and DO, a 3-wire interface
is also a possibility by connecting DI and DO. However, since there is a possibility that the DO output from the serial
memory IC will interfere with the data output from the CPU with a 3-wire interface, install a resistor between DI and
DO in order to give preference to data output from the CPU to DI(See Figure 10).

SIO

Figure 10 3-wire interface

CPU

S-29X90A

R : 10~100 k

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Characteristics

1. DC Characteristics

Ta (°C)

0.4

0.2

=5.5 V

=2 MHz

DATA=0101

-40

CC1

(mA)

Ta (°C)

0.4

0.2

=3.3 V

=500 KHz

DATA=0101

-40

CC1

(mA)

Ta (°C)

0.4

0.2

=1.8 V

=10 KHz

DATA=0101

-40

CC1

(mA)

0.4

0.2

5 6

Ta=25°C
f

=1 MHz, 500 KHz

DATA=0101

(V)

0.4

0.2

5 6

Ta=25°C
f

=100 KHz, 10 KHz

DATA=0101

(V)

0.4

0.2

CC1

(mA)

=5.0 V

Ta=25°C

1M 2M

10K 100K

(Hz)

Ta (°C)

1.0

0.5

=5.5 V

-40

CC2

(mA)

Ta (°C)

1.0

0.5

=3.3 V

-40

CC2

(mA)

CC1

(mA)

CC1

(mA)

100KHZ

10KH

1MHZ

500KH

1.1 Current consumption (READ) I

CC1

Ambient temperature Ta

1.2 Current consumption (READ) I

CC1

Ambient temperature Ta

1.3 Current consumption (READ) I

CC1

Ambient temperature Ta

1.4 Current consumption (READ) I

CC1

Power supply voltage V

1.5 Current consumption (READ) I

CC1

Power supply voltage V

1.6 Current consumption (READ) I

CC1

Clock frequency f

1.7 Current consumption (PROGRAM) I

CC2

Ambient temperature Ta

1.8 Current consumption (PROGRAM) I

CC2

Ambient temperature Ta

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Ta (°C)

1.0

0.5

=5.5 V

DO=0 V

-40

(

Ta (°C)

1.0

0.5

=5.5 V

DO=5.5 V

-40

(

1.0

0.5

5 6

Ta=25°C

(V)

CC2

(mA)

-6

-7

-8

-9

-10

=5.5 V

-11

Ta (°C)

-40

Ta (°C)

1.0

0.5

=5.5 V

CS, SK, DI,
TEST=0 V

-40

(

Ta (°C)

1.0

0.5

-40

=5.5 V

CS, SK, DI,
TEST=5.5 V

(A)

(

Ta (°C)

4.6

4.4

=4.5 V

=-400

-40

(V)

4.2

1.9 Current consumption (PROGRAM) I

CC2

Power supply voltage V

1.10 Standby current consumption I

Ambient temperature Ta

1.13 Output leakage current I

Ambient temperature Ta

1.14 Output leakage current I

Ambient temperature Ta

1.15 High level output voltage V

Ambient temperature Ta

1.11 Input leakage current I

Ambient temperature Ta

1.12 Input leakage current I

Ambient temperature Ta

Ta (°C)

2.7

2.6

=2.7 V

=-100

-40

(V)

2.5

1.16 High level output voltage V

Ambient temperature Ta

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Ta (°C)

2.5

2.4

=2.5 V

=-100

-40

(V)

2.3

Ta (°C)

0.3

0.2

=4.5 V

=2.1 mA

-40

(V)

0.1

Ta (°C)

0.03

0.02

=1.8 V

=100

-40

(V)

0.01

Ta (°C)

-10.0

-5.0

=4.5 V

=2.4 V

-40

(mA)

Ta (°C)

-4

-2

=2.7 V

=2.0 V

-40

(mA)

Ta (°C)

-4

-2

=2.5 V

=1.8 V

-40

(mA)

Ta (°C)

=4.5 V

=0.45 V

-40

(mA)

1.17 High level output voltage V

Ambient temperature Ta

1.18 Low level output voltage V

Ambient temperature Ta

1.19 Low level output voltage V

Ambient temperature Ta

1.20 High level output current I

Ambient temperature Ta

1.21 High level output current I

Ambient temperature Ta

1.22 High level output current I

Ambient temperature Ta

1.23 Low level output current I

Ambient temperature Ta

Ta (

1.0

0.5

=1.8 V

=0.1 V

-40

(mA)

1.24 Low level output current I

Ambient temperature Ta

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

2. AC Characteristics

10K

Ta=25°C

(V)

max

(Hz)

5 6

Ta=25°C

(V)

(ms)

100K

Ta (°C)

=5.0 V

-40

(ms)

Ta (°C)

=3.0 V

-40

(ms)

Ta (°C)

0.6

0.4

=2.7 V

-40

0.2

(

Ta (°C)

0.3

0.2

=4.5 V

-40

0.1

(

Ta (°C)

0.6

0.4

=1.8 V

-40

0.2

(

2.7 Data output delay time t

Ambient temperature Ta

2.6 Data output delay time t

Ambient temperature Ta

2.5 Data output delay time t

Ambient temperature Ta

2.3 Program time t

Ambient temperature Ta

2.4 Program time t

Ambient temperature Ta

2.1 Maximum operating frequency f

max

Power supply voltage V

2.2 Program time t

Power supply voltage V

CMOS SERIAL E

PROM

S-29X90A Series

Seiko Instruments Inc.

Ordering Information

1. 8-pin DIP

There are two types of packages : A or B.

2. 8-pin SOP

There are two types of packages : A or B.

S-29X90A

Package type

: A type

(blank)

: B type

Package

DP: DIP

FJ : SOP1

Product name

S-29190A

: 1K-bit

S-29290A

: 2K-bit

S-29390A

: 4K-bit

See

Pin Assignment, (Figure 1)

A type

S-29190ADPA
S-29290ADPA
S-29390ADPA

B type

S-29190ADP
S-29290ADP
S-29390ADP

A type

S-29190AFJA
S-29290AFJA
S-29390AFJA

B type

S-29190AFJ
S-29290AFJ
S-29390AFJ

0.42±0.09

1.27

0.22±0.03

4.90(5.00max)

8-pin SOP

FJ008-B 990531

ø2.0±0.05

ø1.55±0.05

1.75±0.1

4.0±0.1(10 pitches 40.0±0.2)

0.3±0.05

2.1±0.1

8.0±0.1

6.7±0.1

2.0±0.05

5 max.

3 max.

Feed direction

12.0±0.2

5.5±0.05

5.55±0.1

135

2±0.5

13.5±0.5

2±0.5

ø13±0.2

ø21±0.8

60°

ø80±1

ø330±2

Winding core

Unit:mm

Dimensions

Taping Specifications

Reel Specifications

B type

The information herein is subject to change without notice.

Seiko Instruments Inc. is not responsible for any problems caused by circuits or other diagrams

described herein whose industrial properties, patents or other rights belong to third parties. The

application circuit examples explain typical applications of the products, and do not guarantee any

mass-production design.

When the products described herein include Strategic Products (or Service) subject to regulations,

they should not be exported without authorization from the appropriate governmental authorities.

The products described herein cannot be used as part of any device or equipment which influences

the human body, such as physical exercise equipment, medical equipment, security system, gas

equipment, vehicle or airplane, without prior written permission of Seiko Instruments Inc.

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: S-29190ADPA

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: S-29190ADPA