SN74ALVCH32374

32-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOP

WITH 3-STATE OUTPUTS

SCES283 – OCTOBER 1999

1

POST OFFICE BOX 655303

Widebus+

™ Family

CMOS) Submicron Process

Need for External Pullup/Pulldown

Resistors

JESD 78, Class II

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

Array Package

description

The SN74ALVCH32374 is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus

drivers, and working registers. It can be used as four 8-bit flip-flops, two 16-bit flip-flops, or one 32-bit flip-flop.

On the positive transition of the clock (CLK) input, the Q outputs of the flip-flop take on the logic levels at the

data (D) inputs. The 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 without need for interface or pullup components.

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.

resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The SN74ALVCH32374 is characterized for operation from –40

°C to 85°C.

FUNCTION TABLE

(each flip-flop)

INPUTS

OUTPUT

OE

CLK

D

Q

L

↑

H

H

L

↑

LL

L

H or L

X

Q0

H

X

X

Z

Copyright

© 1999, 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.

EPIC and Widebus+ are trademarks of Texas Instruments Incorporated.