16-Bit Buffers/Line Drivers
CY74FCT163244
CY74FCT163H244
SCCS046 - December 1996 - Revised March 2000
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
Copyright
2000, Texas Instruments Incorporated
Features
Low power, pin-compatible replacement for LCX and
LPT families
5V tolerant inputs and outputs
24 mA balanced drive outputs
Power-off disable outputs permits live insertion
Edge-rate control circuitry for reduced noise
FCT-C speed at 4.1 ns
Latch-up performance exceeds JEDEC standard no. 17
Typical output skew < 250 ps
Industrial temperature range of 40C to +85C
TSSOP (19.6-mil pitch) or SSOP (25-mil pitch)
Typical
V
olp (ground bounce) performance exceeds Mil
Std 883D
V
CC
= 2.7V to 3.6V
ESD (HBM) > 2000V
CY74FCT163H244
Bus hold on data inputs
Eliminates the need for external pull-up or pull-down
resistors
Devices with bus hold are not recommended for trans-
lating rail-to-rail CMOS signals to 3.3V logic levels
Functional Description
These 16-bit buffers/line drivers are designed for use in
memory driver, clock driver, or other bus interface applications,
where high-speed and low power are required. The three-state
controls are designed to allow 4-bit, 8-bit or combined 16-bit
operation. Flow-through pinout and small shrink packaging
simplifies board layout.
The CY74FCT163244 has 24-mA balanced output drivers
with current limiting resistors in the outputs.
The CY74FCT163H244 has "bus hold" on the data inputs,
which retains the last state of the input whenever the source
driving the input goes to high impedance. This eliminates the
need for pull-up/down resistors and prevents floating inputs.
GND
Logic Block Diagrams CY74FCT163244, CY74FCT163H244
Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
33
32
31
30
29
25
26
27
28
36
35
1
OE
34
SSOP/TSSOP
Top View
1
Y
1
1
Y
2
1
Y
3
1
Y
4
13
14
15
16
17
18
19
20
21
22
23
24
45
44
43
42
41
37
38
39
40
48
47
46
1
A
1
1
A
2
1
A
3
1
A
4
1
OE
2
Y
1
2
Y
2
2
Y
3
2
Y
4
2
A
1
2
A
2
2
A
3
2
A
4
2
OE
1
Y
1
1
Y
2
1
Y
3
1
Y
4
1
A
1
1
A
2
1
A
3
1
A
4
2
OE
GND
GND
V
CC
2
Y
3
2
Y
4
2
Y
1
2
Y
2
2
A
1
2
A
2
2
A
3
2
A
4
V
CC
GND
GND
3
Y
3
3
Y
4
3
Y
1
3
Y
2
3
A
1
3
A
2
3
A
3
3
A
4
GND
GND
V
CC
4
Y
3
4
Y
4
4
Y
1
4
Y
2
4
A
1
4
A
2
4
A
3
4
A
4
V
CC
GND
4
OE
3
OE
3
Y
1
3
Y
2
3
Y
3
3
Y
4
3
A
1
3
A
2
3
A
3
3
A
4
3
OE
4
Y
1
4
Y
2
4
Y
3
4
Y
4
4
A
1
4
A
2
4
A
3
4
A
4
4
OE
163244
163H244
CY74FCT163244
CY74FCT163H244
2
Maximum Ratings
[3,4]
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ................................. 55
C to +125
C
Ambient Temperature with
Power Applied............................................ 55
C to +125
C
Supply Voltage Range ..................................... 0.5V to +4.6V
DC Input Voltage ........................................... 0.5V to +7.0V
DC Output Voltage......................................... 0.5V to +7.0V
DC Output Current
(Maximum Sink Current/Pin) ........................60 to +120 mA
Power Dissipation .......................................................... 1.0W
Pin Description
Name
Description
OE
Three-State Output Enable Inputs (Active LOW)
A
Data Inputs
[1]
Y
Three-State Outputs
Function Table
[2]
Inputs
Outputs
OE
A
Y
L
L
L
L
H
H
H
X
Z
Operating Range
Range
Ambient
Temperature
V
CC
Industrial
40
C to +85
C
2.7V to 3.6V
Electrical Characteristics for Non Bus Hold Devices
Over the Operating Range V
CC
=2.7V to 3.6V
Parameter
Description
Test Conditions
Min.
Typ.
[5]
Max.
Unit
V
IH
Input HIGH Voltage
All Inputs
2.0
5.5
V
V
IL
Input LOW Voltage
0.8
V
V
H
Input Hysteresis
[6]
100
mV
V
IK
Input Clamp Diode Voltage
V
CC
=Min., I
IN
=18 mA
0.7
1.2
V
I
IH
Input HIGH Current
V
CC
=Max., V
I
=5.5
1
A
I
IL
Input LOW Current
V
CC
=Max., V
I
=GND
1
A
I
OZH
High Impedance Output Current
(Three-State Output pins)
V
CC
=Max., V
OUT
=5.5V
1
A
I
OZL
High Impedance Output Current
(Three-State Output pins)
V
CC
=Max., V
OUT
=GND
1
A
I
OS
Short Circuit Current
[7]
V
CC
=Max., V
OUT
=GND
60
135
240
mA
I
OFF
Power-Off Disable
V
CC
=0V, V
OUT
4.5V
100
A
I
CC
Quiescent Power Supply Current
V
IN
0.2V,
V
IN
>V
CC
0.2V
V
CC
=Max.
0.1
10
A
I
CC
Quiescent Power Supply Current
(TTL inputs HIGH)
V
IN
=V
CC
0.6V
[8]
V
CC
=Max.
2.0
30
A
Notes:
1.
On the CY74FCT163H244, these pins have "bus hold."
2.
H = HIGH Voltage Level. L = LOW Voltage Level. X = Don't Care. Z = High Impedance.
3.
Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature
range.
4.
With the exception of inputs with bus hold, unused inputs must always be connected to an appropriate logic voltage level, preferably either V
CC
or ground.
5.
Typical values are at V
CC
=3.3V, T
A
= +25C ambient.
6.
This parameter is specified but not tested.
7.
Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting of
a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, I
OS
tests should be performed last.
8.
Per TTL driven input; all other inputs at V
CC
or GND.
CY74FCT163244
CY74FCT163H244
3
Electrical Characteristics For Bus Hold Devices
Over the Operating Range V
CC
=2.7V to 3.6V
Parameter
Description
Test Conditions
Min.
Typ.
[5]
Max.
Unit
V
IH
Input HIGH Voltage
All Inputs
2.0
V
CC
V
V
IL
Input LOW Voltage
0.8
V
V
H
Input Hysteresis
[6]
100
mV
V
IK
Input Clamp Diode Voltage
V
CC
=Min., I
IN
=18 mA
0.7
1.2
V
I
IH
Input HIGH Current
V
CC
=Max., V
I
=V
CC
100
A
I
IL
Input LOW Current
100
A
I
BBH
I
BBL
Bus Hold Sustain Current on Bus Hold Input
[9]
V
CC
=Min.
V
I
=2.0V
50
A
V
I
=0.8V
+50
A
I
BHHO
I
BHLO
Bus Hold Overdrive Current on Bus Hold In-
put
[9]
V
CC
=Max., V
I
=1.5V
500
A
I
OZH
High Impedance Output Current
(Three-State Output pins)
V
CC
=Max., V
OUT
=V
CC
1
A
I
OZL
High Impedance Output Current
(Three-State Output pins)
V
CC
=Max., V
OUT
=GND
1
A
I
OS
Short Circuit Current
[7]
V
CC
=Max., V
OUT
=GND
60
135
240
mA
I
OFF
Power-Off Disable
V
CC
=0V, V
OUT
4.5V
100
A
I
CC
Quiescent Power Supply Current
V
IN
0.2V,
V
IN
>V
CC
0.2V
V
CC
=Max.
+40
A
ICC
Quiescent Power supply Current
(TTL inputs HIGH)
V
IN
=V
CC
0.6V
[8]
V
CC
=Max.
+350
A
Electrical Characteristics For Balanced Drive Devices
Over the Operating Range V
CC
=2.7V to 3.6V
Parameter
Description
Test Conditions
Min.
Typ.
[5]
Max.
Unit
I
ODL
Output LOW Dynamic Current
[7]
V
CC
=3.3V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
45
180
mA
I
ODH
Output HIGH Dynamic Current
[7]
V
CC
=3.3V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
45
180
mA
V
OH
Output HIGH Voltage
V
CC
=Min., I
OH
= 0.1 mA
V
CC
0.2
V
V
CC
=3.0V, I
OH
= 8 mA
2.4
[10]
3.0
V
V
CC
=3.0V, I
OH
= 24 mA
2.0
3.0
V
V
OL
Output LOW Voltage
V
CC
=Min., I
OL
= 0.1mA
0.2
V
V
CC
=Min., I
OL
= 24 mA
0.3
0.55
Notes:
9.
Pins with bus hold are described in Pin Description.
10. V
OH
= V
CC
0.6V at rated current.
CY74FCT163244
CY74FCT163H244
4
Capacitance
[6]
(T
A
= +25C, f = 1.0 MHz)
Parameter
Description
Test Conditions
Typ.
[5]
Max.
Unit
C
IN
Input Capacitance
V
IN
= 0V
4.5
6.0
pF
C
OUT
Output Capacitance
V
OUT
= 0V
5.5
8.0
pF
Power Supply Characteristics
Parameter
Description
Test Conditions
Typ.
[5]
Max.
Unit
I
CCD
Dynamic Power Supply
Current
[10]
V
CC
=Max., One Input Toggling,
50% Duty Cycle,
Outputs Open, OE=GND
V
IN
=V
CC
or
V
IN
=GND
50
75
A/MHz
I
C
Total Power Supply
Current
[11]
V
CC
=Max., f
1
=10 MHz, 50%
Duty Cycle, Outputs Open, One
Bit Toggling, OE=GND
V
IN
=V
CC
or
V
IN
=GND
0.5
0.8
mA
V
IN
=V
CC
0.6V or
V
IN
=GND
0.5
0.8
mA
V
CC
=Max., f
1
=2.5 MHz, 50%
Duty Cycle, Outputs Open, Six-
teen Bits Toggling, OE=GND
V
IN
=V
CC
or
V
IN
=GND
2.0
3.0
[12]
mA
V
IN
=V
CC
0.6V or
V
IN
=GND
2.0
3.3
[12]
mA
Notes:
11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
12. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+I
CCD
(f
0
/2 + f
1
N
1
)
I
CC
= Quiescent Current with CMOS input levels
I
CC
= Power Supply Current for a TTL HIGH input (V
IN
=3.4V)
D
H
= Duty Cycle for TTL inputs HIGH
N
T
= Number of TTL inputs at D
H
I
CCD
= Dynamic Current caused by an input transition pair (HLH or LHL)
f
0
= Clock frequency for registered devices, otherwise zero
f
1
= Input signal frequency
N
1
= Number of inputs changing at f
1
All currents are in milliamps and all frequencies are in megahertz.
13. Values for these conditions are examples of the I
CC
formula. These limits are specified but not tested.
CY74FCT163244
CY74FCT163H244
5
Switching Characteristics
Over the Operating Range V
CC
=3.0V to 3.6V
[14,15]
Parameter
Description
CY74FCT163244A
CY74FCT163H244A
CY74FCT163244C
CY74FCT163H244C
Min.
Max.
Min.
Max.
Unit
Fig. No.
[16]
t
PLH
t
PHL
Propagation Delay Data to
Output
1.5
4.8
1.5
4.1
ns
1, 3
t
PZH
t
PZL
Output Enable Time
1.5
6.2
1.5
5.8
ns
1, 7, 8
t
PHZ
t
PLZ
Output Disable Time
1.5
5.6
1.5
5.2
ns
1, 7, 8
t
SK(O)
Output Skew
[17]
0.5
0.5
ns
--
Notes:
14. Minimum limits are specified but not tested on Propagation Delays.
15. For V
CC
=2.7, propagation delay, output enable and output disable times should be degraded by 20%.
16. See "Parameter Measurement Information" in the General Information section.
17. Skew between any two outputs of the same package switching in the same direction. This parameter is ensured by design.
Ordering Information CY74FCT163244
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
4.1
CY74FCT163244CPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT163244CPVC/PVCT
O48
48-Lead (300-Mil) SSOP
4.8
CY74FCT163244APACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT163244APVC/PVCT
O48
48-Lead (300-Mil) SSOP
Ordering Information CY74FCT163H244
Speed
(ns)
Ordering Code
Package
Name
Package Type
Operating
Range
4.1
74FCT163H244CPACT
Z48
48-Lead (240-Mil) TSSOP
Industrial
CY74FCT163H244CPVC
O48
48-Lead (300-Mil) SSOP
74FCT163H244CPVCT
O48
48-Lead (300-Mil) SSOP
CY74FCT163244
CY74FCT163H244
6
Package Diagrams
48-Lead Shrunk Small Outline Package O48
48-Lead Thin Shrunk Small Outline Package Z48
IMPORTANT NOTICE
Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL
APPLICATIONS"). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO
BE FULLY AT THE CUSTOMER'S RISK.
In order to minimize risks associated with the customer's applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
semiconductor products or services might be or are used. TI's publication of information regarding any third
party's products or services does not constitute TI's approval, warranty or endorsement thereof.
Copyright
2000, Texas Instruments Incorporated
PDF 
ZIP