1
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
SEPTEMBER 2002
IDT74AUC16245
ADVANCE
INFORMATION
INDUSTRIAL TEMPERATURE RANGE
1.8V CMOS 16-BIT BUS
TRANSCEIVER WITH
3-STATE OUTPUTS
DESCRIPTION:
This 16-bit bus transceiver is built using advanced CMOS technology. The
AUC16245 is designed specifically for asynchronous communications between
data buses. The control function implementation minimizes external timing
requirements.
This device can be used as one 16-bit transceiver or two 8-bit transceivers.
It allows data transmission from A bus to B bus or from B bus to A bus, depending
on the logic level at the direction-control (DIR) input. The output-enable (OE)
input can be used to disable the device so that the buses are effectively isolated.
This device is fully specified for partial power-down applications using I
OFF
.
The I
OFF
circuitry disables the outputs, preventing damaging current backflow
through the device when it is powered down.
The AUC16245 is designed with a 9mA output driver. This driver is capable
of driving a moderate load while maintaining speed performance.
To ensure the high-impedance state during power up or power down, OE
should be tied to V
DD
through a pull-up resistor; the minimum value of the resistor
is determined by the current-sinking capability of the driver.
1
A
1
1
B
1
47
2
1
DIR
1
OE
2
A
1
2
B
1
36
13
2
DIR
2
OE
1
48
24
25
T O SEVEN OTH ER C HAN N ELS
TO SEVEN OTH ER C HAN N ELS
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2002 Integrated Device Technology, Inc.
DSC-5954/16
FEATURES:
ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
1.8V Optimized
0.8V to 2.7V Operating Range
Inputs/outputs tolerant up to 3.6V
Output drivers: 9mA @ V
DD
= 2.3V
Supports hot insertion
Available in TSSOP, TVSOP, and VFBGA packages
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS:
High performance, low voltage communications systems
High performance, low voltage computing systems
2
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
A
1OE
NC
NC
NC
NC
1DIR
B
1A2
1A1
GND
GND
1B1
1B2
C
1A4
1A3
V
DD
V
DD
1B3
1B4
E
1A8
1A7
1B7
1B8
F
2A1
2A2
2B2
2B1
G
2A3
2A4
GND
GND
2B4
2B3
H
2A5
2A6
V
DD
V
DD
2B6
2B5
J
2A7
2A8
GND
GND
2B8
2B7
K
2OE
2DIR
NC
NC
NC
NC
D
1A6
1A5
GND
GND
1B5
1B6
6
5
4
3
2
1
1
2
3
4
5
6
A
B
C
D
E
F
G
H
J
K
56 BALL VFBGA PACKAGE LAYOUT
PINOUT CONFIGURATION
VFBGA
TOP VIEW
NOTE:
NC = No Internal Connection
3
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
TSSOP/ TVSOP
TOP VIEW
PIN CONFIGURATION
1
DIR
1
B
1
1
B
2
GND
1
B
3
1
B
4
V
DD
1
B
5
1
B
6
GND
1
B
7
1
B
8
2
B
1
2
B
2
2
B
4
2
DIR
GND
V
DD
2
B
5
2
B
6
GND
2
B
7
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
40
41
42
43
44
45
46
47
48
1
1
OE
1
A
1
1
A
2
GND
1
A
3
1
A
4
V
DD
1
A
5
1
A
6
1
A
7
1
A
8
2
A
1
GND
2
A
3
2
A
4
2
A
5
2
A
6
GND
2
A
7
2
A
8
2
OE
2
B
3
2
B
8
V
DD
2
A
2
GND
FUNCTION TABLE
(EACH 8-BIT SECTION)
(1)
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Z = High-Impedance
Inputs
xOE
xDIR
Outputs
L
L
Bus B Data to Bus A
L
H
Bus A Data to Bus B
H
X
Z
PIN DESCRIPTION
Pin Names
Description
xOE
3-State Output Enable Inputs (Active Low)
xDIR
Direction Control Inputs
xAx
A Side Inputs or 3-State Outputs
xBx
B Side Inputs or 3-State Outputs
Symbol
Description
Max
Unit
V
TERM
Terminal Voltage with Respect to GND
0.5 to +3.6
V
(all input and V
DD
terminals)
V
TERM
Terminal Voltage with Respect to GND
0.5 to +3.6
V
(any I/O or Output terminals in high-
impedance or power-off state)
V
TERM
Terminal Voltage with Respect to GND
0.5 to +3.6
V
(any I/O or Output terminals in high or
low state)
T
STG
Storage Temperature
65 to +150
C
I
OUT
Continuous DC Output Current
20
mA
I
IK
Continuous Clamp Current
V
I
> V
DD
+50
mA
V
I
< 0
50
I
OK
Continuous Clamp Current, V
O
< 0
50
mA
I
DD
Continuous Current through
100
mA
I
SS
each V
DD
or GND
ABSOLUTE MAXIMUM RATINGS
(1)
(1)
(1)
(1)
(1)
NOTE:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause
permanent damage to the device. This is a stress rating only and functional operation
of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
CAPACITANCE
(T
A
= +25C, f = 1.0MHz, V
DD
= 2.5V)
NOTES:
1. Applies to the Control Inputs.
2. Applies to ports A and B.
Symbol
Parameter
Conditions
Typ. Max. Unit
C
IN
Input Capacitance
(1)
V
IN
= V
DD
or GND
3
pF
C
I/O
I/O Port Capacitance
(2)
V
I/O
= V
DD
or GND
7
pF
4
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Symbol
Parameter
Test Conditions
Min.
Max.
Unit
V
DD
Supply Voltage
0.8
2.7
V
V
DD
= 0.8V
V
DD
--
V
DD
= 1.1V to 1.3V
0.65 x V
DD
--
V
IH
Input HIGH Voltage Level
V
DD
= 1.4V to 1.6V
0.65 x V
DD
--
V
V
DD
= 1.65V to 1.95V
0.65 x V
DD
--
V
DD
= 2.3V to 2.7V
1.7
--
V
DD
= 0.8V
--
0
V
DD
= 1.1V to 1.3V
--
0.35 x V
DD
V
IL
Input LOW Voltage Level
V
DD
= 1.4V to 1.6V
--
0.35 x V
DD
V
V
DD
= 1.65V to 1.95V
--
0.35 x V
DD
V
DD
= 2.3V to 2.7V
--
0.7
V
I
Input Voltage
0
2.7
V
V
O
Output Voltage
Active State
0
V
DD
V
3-State
0
2.7
V
DD
= 0.8V
--
0.7
V
DD
= 1.1V
--
3
I
OH
HIGH Level Output Current
V
DD
= 1.4V
--
5
mA
V
DD
= 1.65V
--
8
V
DD
= 2.3V
--
9
V
DD
= 0.8V
--
0.7
V
DD
= 1.1V
--
3
I
OL
LOW Level Output Current
V
DD
= 1.4V
--
5
mA
V
DD
= 1.65V
--
8
V
DD
= 2.3V
--
9
t/v
Input Transition Rise or Fall Time
--
5
ns/V
T
A
Operating Free-Air Temperature
40
+85
C
RECOMMENDED OPERATING CHARACTERISTICS
(1)
NOTE:
1. All unused inputs of the device must be held at V
DD
or GND to ensure proper operation.
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
I
IH
Input HIGH or LOW Current Data Inputs
V
DD
= 2.7V, V
I
= V
DD
or GND
--
--
10
A
I
IL
Control Inputs
--
--
5
I
OFF
Input/Output Power Off Leakage
V
DD
=
0V, V
IN or
V
O
2.7V
--
--
10
A
I
OZH
(2)
High Impedance Output Current
V
DD
= 2.7V
V
O
= V
DD
--
--
10
A
I
OZL
(2)
(3-State Output Pins)
V
O
= GND
--
--
10
I
DDL
Quiescent Power Supply Current
V
DD
= 0.8V to 2.7V
--
--
20
A
I
DDH
V
IN
= GND or V
DD
I
DDZ
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
(1)
Following Conditions Apply Unless Otherwise Specified:
Operating Conditions: T
A
= 40C to +85C
NOTES:
1. All unused inputs of the device must be held at V
DD
or GND to ensure proper operation.
2. For the I/O ports, the parameters I
OZH
and I
OZL
include the input leakage current.
5
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Symbol
Parameter
Test Conditions
(1)
Min.
Typ.
Max.
Unit
V
DD
= 0.8V - 2.7V
I
OH
= 100
A
V
DD
- 0.1
--
--
V
DD
= 0.8V
I
OH
= 0.7mA
--
0.55
--
V
OH
Output HIGH Voltage
V
DD
= 1.1V
(2)
I
OH
= 3mA
0.8
--
--
V
V
DD
= 1.4V
(3)
I
OH
= 5mA
1
--
--
V
DD
= 1.65V
(4)
I
OH
= 8mA
1.2
--
--
V
DD
= 2.3V
(5)
I
OH
= 9mA
1.8
--
--
V
DD
= 0.8V - 2.7V
I
OH
= 100
A
--
--
0.2
V
DD
= 0.8V
I
OL
= 0.7mA
--
0.25
--
V
OL
Output LOW Voltage
V
DD
= 1.1V
(2)
I
OL
= 3mA
--
--
0.3
V
V
DD
= 1.4V
(3)
I
OL
= 5mA
--
--
0.4
V
DD
= 1.65V
(4)
I
OL
= 8mA
--
--
0.45
V
DD
= 2.3V
(5)
I
OH
= 9mA
--
--
0.6
OUTPUT DRIVE CHARACTERISTICS
NOTES:
1. V
IL
and V
IH
must be within the min. or max. range shown in the DC ELECTRICAL CHARACTERISTICS table for the appropriate V
DD
range. T
A
= -40C to +85C.
2. Demonstrates operation for nominal V
DD
= 1.2V.
3. Demonstrates operation for nominal V
DD
= 1.5V.
4. Demonstrates operation for nominal V
DD
= 1.8V.
5. Demonstrates operation for nominal V
DD
= 2.5V.
SWITCHING CHARACTERISTICS
(1)
NOTE:
1. See TEST CIRCUITS AND WAVEFORMS. T
A
= -40C to +85C.
V
DD
= 0.8V V
DD
= 1.2V0.1V
V
DD
= 1.5V0.1V
V
DD
= 1.8V0.15V
V
DD
= 2.5V0.2V
Symbol
Parameter
Typ.
Min.
Max.
Min.
Max.
Min.
Typ.
Max.
Min.
Max.
Unit
t
PLH
Propagation Delay
5.6
0.5
3.1
0.5
2
0.5
1.5
2
0.4
1.9
ns
t
PHL
xAx to xBx or xBx to xAx
t
PZH
Output Enable Time
10
0.7
4.6
0.7
3.1
0.7
2.1
3.1
0.7
2.6
ns
t
PZL
xOE to xAx or xBx
t
PHZ
Output Disable Time
12.8
0.8
6.8
0.8
5
0.8
3.4
4.8
0.5
2.9
ns
t
PLZ
xOE to xAx or xBx
OPERATING CHARACTERISTICS, T
A
= 25C
Symbol
Parameter
Test Conditions
V
DD
= 0.8V
V
DD
= 1.2V
V
DD
= 1.5V
V
DD
= 1.8V
V
DD
= 2.5V
Unit
C
PD
Power Dissipation Outputs Enabled
C
L
= 0pF
22
23
24
25
29
pF
Capacitance
Outputs Disabled
f = 10MHz
1
1
1
1
1
6
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
Open
V
LO AD
G N D
V
DD
Pulse
Generator
D.U .T.
R
L
C
L
R
T
V
IN
V
OU T
(1)
SAM E PH ASE
IN PU T TR AN SITIO N
OPPO SITE PH ASE
IN PU T TRAN SITIO N
0V
0V
V
OH
V
OL
t
PLH
t
PH L
t
PH L
t
PLH
O UTPU T
V
D D
V
T
V
T
V
D D
V
T
CO N TR O L
INPU T
t
PLZ
0V
OU TPUT
N O RM ALLY
LOW
t
P ZH
0V
SW ITCH
CLOSED
OU TPU T
N OR M ALLY
H IGH
EN ABLE
DISABLE
SW ITCH
OPEN
t
PH Z
0V
V
O L +
V
LZ
V
O H
V
T
V
T
t
PZL
V
LOAD /2
V
LOAD/2
V
D D
V
T
V
O L
V
OH -
V
HZ
R
L
TEST CIRCUITS AND WAVEFORMS
Propagation Delay
Test Circuits for All Outputs
Enable and Disable Times
NOTE:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse Generator.
NOTE:
1. Pulse Generator for All Pulses: Rate
10MHz; Slew Rate 1V/ns.
Test
Switch
Open Drain
Disable Low
V
LOAD
Enable Low
Disable High
GND
Enable High
All Other Tests
Open
SWITCH POSITION
TEST CONDITIONS
(1)
Symbol
V
DD
= 0.8V
V
DD
= 1.2V0.1V
V
DD
= 1.5V0.1V
V
DD
= 1.8V0.15V
V
DD
= 2.5V0.2V
Unit
V
LOAD
2xV
DD
2xV
DD
2xV
DD
2xV
DD
2xV
DD
V
V
T
V
DD
/2
V
DD
/2
V
DD
/2
V
DD
/2
V
DD
/2
V
V
LZ
100
100
100
150
150
mV
V
HZ
100
100
100
150
150
mV
R
L
2
2
2
1
0.5
k
C
L
15
15
15
30
30
pF
7
INDUSTRIAL TEMPERATURE RANGE
IDT74AUC16245
1.8V CMOS 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS
ORDERING INFORMATION
IDT
XX
AUC
XXX
XX
Package
BV
PA
PF
Very Fine Pitch Ball Grid Array
Thin Shrink Small Outline Package
Thin Very Small Outline Package
16
74
16-Bit Bus Transceiver with 3-State Outputs
40C to +85C
245
Double-Density
Blank
No Bus-Hold
Device Type
Temp. Range
XX
Family
X
Bus-Hold
X
Grade
I
Industrial Temperature Range
CORPORATE HEADQUARTERS
for SALES:
for Tech Support:
2975 Stender Way
800-345-7015 or 408-727-6116
logichelp@idt.com
Santa Clara, CA 95054
fax: 408-492-8674
(408) 654-6459
www.idt.com
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