SN54AC374_07 Datasheet, PDF (1/18 Pages) Texas Instruments – OCTAL D-TYPE EDGE-TRIGGERED FLIP-FLOPS

SN54AC374, SN74AC374
OCTAL DĆTYPE EDGEĆTRIGGERED FLIPĆFLOPS
WITH 3ĆSTATE OUTPUTS
SCAS543E − OCTOBER 1995 - REVISED OCTOBER 2003
D 2-V to 6-V V_CC Operation
D Inputs Accept Voltages to 6 V
D Max t_pd of 9.5 ns at 5 V
D 3-State Noninverting Outputs Drive Bus
Lines Directly
D Full Parallel Access for Loading
description/ordering information
These 8-bit flip-flops feature 3-state outputs
designed specifically for driving highly capacitive
or relatively low-impedance loads. The devices
are particularly suitable for implementing buffer
registers, I/O ports, bidirectional bus drivers, and
working registers.
The eight flip-flops of the ’AC374 devices are
D-type edge-triggered flip-flops. On the positive
transition of the clock (CLK) input, the Q outputs
are set to the logic levels set up 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
the increased drive provide the capability to drive
bus lines in bus-organized systems without need
for interface or pullup components.
SN54AC374 . . . J OR W PACKAGE
SN74AC374 . . . DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
OE 1
1Q 2
1D 3
2D 4
2Q 5
3Q 6
3D 7
4D 8
4Q ⁹
GND ¹⁰
20 V_CC
19 8Q
18 8D
17 7D
16 7Q
15 6Q
14 6D
13 5D
12 _5Q
11 _CLK
SN54AC374 . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
2D ₄
18 ^8D
2Q ₅
17 7D
3Q 6
16 7Q
3D 7
15 6Q
4D 8
14 6D
9 10 11 12 13
OE does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while
the outputs are in the high-impedance state.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP − N
Tube
SN74AC374N
SN74AC374N
SOIC − DW
Tube
Tape and reel
SN74AC374DW
SN74AC374DWR
AC374
−40°C to 85°C SOP − NS
Tape and reel SN74AC374NSR
AC374
SSOP − DB
Tape and reel SN74AC374DBR
AC374
TSSOP − PW
Tube
Tape and reel
SN74AC374PW
SN74AC374PWR
AC374
CDIP − J
Tube
SNJ54AC374J
SNJ54AC374J
−55°C to 125°C CFP − W
Tube
SNJ54AC374W
SNJ54AC374W
LCCC − FK
Tube
SNJ54AC374FK
SNJ54AC374FK
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are}
available at www.ti.com/sc/package.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2003, Texas Instruments Incorporated
On products compliant to MILĆPRFĆ38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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