Philips HEF40374BU, HEF40374BT, HEF40374BPB, HEF40374BP, HEF40374BDB Datasheet

DATA SH EET

Product specification
File under Integrated Circuits, IC04

January 1995

INTEGRATED CIRCUITS

HEF40374B
MSI

Octal D-type flip-flop with 3-state
outputs

For a complete data sheet, please also download:

•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC

•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC

January 1995 2

Philips Semiconductors Product specification

Octal D-type flip-flop with 3-state outputs

HEF40374B

MSI

DESCRIPTION

The HEF40374B is an octal D-type flip-flop with 3-state
buffered outputs with a common clock input (CP). The
device is used primarily as an 8-bit positive edge-triggered
storage register for interfacing with a 3-state bus. Data on
the D-inputs is transferred to storage during the
LOW-to-HIGH transition of the clock (CP) input. The
3-state output buffers are controlled by an active LOW
output enable input (EO). A HIGH on EO forces the eight
outputs to a high impedance OFF-state. When EO is
LOW, the data in the register appears at the outputs.

The output stages have high current output capability
suitable for driving highly capacitive loads.
The device features hysteresis on the CP input to improve
noise rejection.
Schmitt-trigger action in the E input makes the circuit
highly tolerant to slower input rise and fall times.

The HEF40374B is pin and functionally compatible with
the TTL ‘374’ device.
Supply voltage range: 3 to 15 V.

Fig.1 Functional diagram. Fig.2 Pinning diagram.

HEF40374BP(N): 20-lead DIL; plastic (SOT146-1)
HEF40374BD(F): 20-lead DIL; ceramic (cerdip)

(SOT152)
HEF40374BT(D): 20-lead SO; plastic (SOT163-1)
( ): Package Designator North America

PINNING

FAMILY DATA, I

DD

LIMITS category MSI

See Family Specifications

D

0

to D

7

data inputs
CP clock input
EO output enable input (active LOW)
O

0

to O

7

3-state buffered outputs

January 1995 3

Philips Semiconductors Product specification

Octal D-type flip-flop with 3-state outputs

HEF40374B

MSI

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Fig.3 Logic diagram.