SN54LVC574A, SN74LVC574A
OCTAL EDGE-TRIGGERED D-TYPE FLIP-FLOPS
WITH 3-STATE OUTPUTS
SCAS301R − JANUARY 1993 − REVISED MARCH 2005
D
Operate From 1.65 V to 3.6 V
D
Inputs Accept Voltages to 5.5 V
D
Specified From −40°C to 85°C,
D
D
D
−40°C to 125°C, and −55°C to 125°C
Max t
pd
of 7 ns at 3.3 V
Typical V
OLP
(Output Ground Bounce)
<0.8 V at V
CC
= 3.3 V, T
A
= 25°C
Typical V
OHV
(Output V
OH
Undershoot)
>2 V at V
CC
= 3.3 V, T
A
= 25°C
D
Support Mixed-Mode Signal Operation on
D
D
D
All Ports (5-V Input/Output Voltage With
3.3-V V
CC
)
I
off
Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 250 mA Per
JESD 17
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
SN54LVC574A . . . FK PACKAGE
(TOP VIEW)
V
CC
2D
1D
OE
V
CC
OE
1D
2D
3D
4D
5D
6D
7D
8D
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
V
CC
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
1
OE
20
19
1Q
18
2Q
17
3Q
16
4Q
15
5Q
14
6Q
13
7Q
12
8Q
1D
2D
3D
4D
5D
6D
7D
8D
2
3
4
5
6
7
8
9
10
11
3D
4D
5D
6D
7D
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
1Q
2Q
3Q
4Q
5Q
6Q
SN54LVC574A . . . J OR W PACKAGE
SN74LVC574A . . . DB, DGV, DW, N, NS,
OR PW PACKAGE
(TOP VIEW)
SN74LVC574A . . . RGY PACKAGE
(TOP VIEW)
description/ordering information
The SN54LVC574A octal edge-triggered D-type flip-flop is designed for 2.7-V to 3.6-V V
CC
operation, and the
SN74LVC574A octal edge-triggered D-type flip-flop is designed for 1.65-V to 3.6-V V
CC
operation.
These devices feature 3-state outputs designed specifically for driving highly capacitive or relatively
low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional
bus drivers, and working registers.
On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels at the data (D) inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high
or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive
the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus
lines without interface or pullup components.
OE does not affect the internal operations of the flip-flops. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
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.
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.
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.
GND
CLK
Copyright
©
2005, Texas Instruments Incorporated
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.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
8D
GND
CLK
8Q
7Q
1
TI [ TEXAS INSTRUMENTS ]
