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CY74FCT16373T Datasheet Preview

CY74FCT16373T Datasheet

16-Bit Latches

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Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
CY74FCT16373T
CY74FCT162373T
SCCS054C - August 1994 - Revised October 2003
Features
• Ioff supports partial-power-down mode operation
• Edge-rate control circuitry for significantly improved
noise characteristics
• Typical output skew < 250 ps
• ESD > 2000V
• TSSOP (19.6-mil pitch) and SSOP (25-mil pitch)
packages
• Industrial temperature range of 40˚C to +85˚C
• VCC = 5V ± 10%
CY74FCT16373T Features:
• 64 mA sink current, 32 mA source current
• Typical VOLP (ground bounce) <1.0V at VCC = 5V,
TA = 25˚C
CY74FCT162373T Features:
• Balanced 24 mA output drivers
• Reduced system switching noise
• Typical VOLP (ground bounce) <0.6V at VCC = 5V,
TA= 25˚C
16-Bit Latches
Functional Description
CY74FCT16373T and CY74FCT162373T are 16-bit D-type
latches designed for use in bus applications requiring high
speed and low power. These devices can be used as two
independent 8-bit latches or as a single 16-bit latch by
connecting the Output Enable (OE) and Latch (LE) inputs.
Flow-through pinout and small shrink packaging aid in
simplifying board layout.
This device is fully specified for partial-power-down
applications using Ioff. The Ioff circuitry disables the outputs,
preventing damaging current backflow through the device
when it is powered down.
The CY74FCT16373T is ideally suited for driving
high-capacitance loads and low-impedance backplanes.
The CY74FCT162373T has 24-mA balanced output drivers
with current limiting resistors in the outputs. This reduces the
need for external terminating resistors and provides for
minimal undershoot and reduced ground bounce. The
CY74FCT162373T is ideal for driving transmission lines.
Logic Block Diagrams
1OE
1LE
D
1D1
C
1O1
TO 7 OTHER CHANNELS
FCT162373-1
2OE
2LE
D
2D1
C
2O1
TO 7 OTHER CHANNELS
FCT162373-2
Pin Configuration
SSOP/TSSOP/TVSOP
Top View
1OE
1O1
1O2
GND
1O3
1O4
VCC
1O5
1O6
GND
1O7
1O8
2O1
2O2
GND
2O3
2O4
VCC
2O5
2O6
GND
2O7
2O8
2OE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48 1LE
47 1D1
46 1D2
45 GND
44 1D3
43 1D4
42 VCC
41 1D5
40 1D6
39 GND
38 1D7
37 1D8
36 2D1
35 2D2
34 GND
33 2D3
32 2D4
31 VCC
30 2D5
29 2D6
28 GND
27 2D7
26 2D8
25 2LE
FCT162373-3
Copyright © 2003, Texas Instruments Incorporated




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CY74FCT16373T Datasheet Preview

CY74FCT16373T Datasheet

16-Bit Latches

No Preview Available !

CY74FCT16373T
CY74FCT162373T
Pin Description
Name
D
LE
OE
O
Description
Data Inputs
Latch Enable Inputs (Active HIGH)
Output Enable Inputs (Active LOW)
Three-State Outputs
Function Table[1]
Inputs
D LE
HH
LH
XL
XX
OE
L
L
L
H
Outputs
O
H
L
Q0
Z
Maximum Ratings[2, 3]
(Above which the useful life may be impaired. For user
guidelines, not tested.)
Storage Temperature ...................... Com’l 55°C to +125°C
Ambient Temperature with
Power Applied................................. Com’l 55°C to +125°C
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
Static Discharge Voltage............................................>2001V
(per MIL-STD-883, Method 3015)
Operating Range
Range
Industrial
Ambient
Temperature
40°C to +85°C
VCC
5V ± 10%
Electrical Characteristics Over the Operating Range
Parameter
Description
VIH
VIL
VH
VIK
IIH
IIL
IOZH
Input HIGH Voltage
Input LOW Voltage
Input Hysteresis[5]
Input Clamp Diode Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
(Three-State Output pins)
IOZL High Impedance Output Current
(Three-State Output pins)
IOS Short Circuit Current[6]
IO Output Drive Current[6]
IOFF Power-Off Disable
Test Conditions
VCC=Min., IIN=18 mA
VCC=Max., VI=VCC
VCC=Max., VI=GND
VCC=Max., VOUT=2.7V
VCC=Max., VOUT=0.5V
VCC=Max., VOUT=GND
VCC=Max., VOUT=2.5V
VCC=0V, VOUT4.5V[7]
Min.
2.0
Typ.[4]
100
0.7
Max.
0.8
1.2
±1
±1
±1
Unit
V
V
mV
V
µA
µA
µA
±1 µA
80 140 200 mA
50 180 mA
±1 µA
Output Drive Characteristics for CY74FCT16373T
Parameter
Description
Test Conditions
Min. Typ.[4] Max. Unit
VOH Output HIGH Voltage
VCC=Min., IOH=3 mA
2.5 3.5
V
VCC=Min., IOH=15 mA
2.4 3.5
V
VCC=Min., IOH=32 mA
2.0 3.0
V
VOL Output LOW Voltage
VCC=Min., IOL=64 mA
0.2 0.55 V
Notes:
1. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Impedance. Q0=Previous state of flip-flop.
2. 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.
3. Unused inputs must always be connected to an appropriate logic voltage level, preferably either VCC or ground.
4. Typical values are at VCC=5.0V, TA= +25˚C ambient.
5. This parameter is specified but not tested.
6. 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, IOS tests should be performed last.
7. Tested at +25˚C.
2


Part Number CY74FCT16373T
Description 16-Bit Latches
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