CY54FCT574T, CY74FCT574T
8-BIT REGISTERS
WITH 3-STATE OUTPUTS
SCCS073 – OCTOBER 2001
CY54FCT574T . . . D PACKAGE
CY74FCT574T . . . Q OR SO PACKAGE
(TOP VIEW)
Function, Pinout, and Drive Compatible
With FCT and F Logic
Reduced V
of Equivalent FCT Functions
(Typically = 3.3 V) Versions
OH
OE
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
D
D
1
D
O
O
O
O
O
O
O
O
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
0
0
1
2
3
4
5
6
7
2
D
3
D
I
Supports Partial-Power-Down Mode
off
Operation
4
D
D
D
5
6
7
Matched Rise and Fall Times
Fully Compatible With TTL Input and
Output Logic Levels
GND
CP
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
CY54FCT574T . . . L PACKAGE
(TOP VIEW)
– 1000-V Charged-Device Model (C101)
Edge-Triggered D-Type Inputs
250-MHz Typical Switching Rate
3
2
1
20 19
18
D
D
D
D
D
O
O
O
O
O
4
5
6
7
8
2
3
4
5
6
1
2
3
4
5
CY54FCT574T
– 32-mA Output Sink Current
– 12-mA Output Source Current
17
16
15
14
CY74FCT574T
– 64-mA Output Sink Current
– 32-mA Output Source Current
9 10 11 12 13
3-State Outputs
description
The ’FCT574T devices are high-speed, low-power, octal D-type flip-flops, featuring separate D-type inputs for
each flip-flop. These devices have 3-state outputs for bus-oriented applications. A buffered clock (CP) and
output-enable (OE) inputs are common to all flip-flops. The ’FCT574T are identical to ’FCT374T, except for a
flow-through pinout to simplify board design. The eight flip-flops in the ’FCT574T store the state of their
individual D inputs that meet the setup-time and hold-time requirements on the low-to-high CP transition. When
OE is low, the contents of the eight flip-flops are available at the outputs. When OE is high, the outputs are in
the high-impedance state. The state of OE does not affect the state of the flip-flops.
These devices are fully specified for partial-power-down applications using I . The I circuitry disables the
off
off
outputs, preventing damaging current backflow through the device when it is powered down.
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.
Copyright 2001, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
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
unless otherwise noted. On all other products, production
testing of all parameters.
processing does not necessarily include testing of all parameters.
1
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