Datasheet

CY54FCT573T, CY74FCT573T
8-BIT LATCHES
WITH 3-STATE OUTPUTS
SCCS068 – OCTOBER 2001
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Function and Pinout Compatible With FCT
and F Logic
Reduced V
OH
(Typically = 3.3 V) Versions
of Equivalent FCT Functions
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
I
off
Supports Partial-Power-Down Mode
Operation
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
3-State Outputs
CY54FCT573T
– 32-mA Output Sink Current
– 12-mA Output Source Current
CY74FCT573T
– 64-mA Output Sink Current
– 32-mA Output Source Current
description
The ’FCT573T devices consist of eight latches with 3-state outputs for bus-organized applications. When the
latch-enable (LE) input is high, the flip-flops appear transparent to the data. Data that meets the required setup
times are latched when LE transitions from high to low. Data appears on the bus when the output-enable (OE
)
input is low. When OE
is high, the bus output is in the high-impedance state. In this mode, data can be entered
into the latches. The ’FCT573T devices are identical to the ’FCT373T devices, except for the flow-through
pinout of the ’FCT573T, which simplifies board design.
These devices are 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.
Copyright  2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
CY54FCT573T ...D PACKAGE
CY74FCT573T ...P, Q, OR SO PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
GND
V
CC
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
LE
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.