74HC7404D datasheet(2/28 Pages) PHILIPS

2 / 28 page

September 1993

Philips Semiconductors

Product speciﬁcation

5-Bit x 64-word FIFO register; 3-state

74HC/HCT7404

FEATURES

• Synchronous or asynchronous operation

• 3-state outputs

• 30 MHz (typical) shift-in and shift-out rates

• Readily expandable in word and bit dimensions

• Pinning arranged for easy board layout: input pins

directly opposite output pins

• Output capability: driver (8 mA)

• ICC category: LSI.

APPLICATIONS

• High-speed disc or tape controller

• Communications buffer.

GENERAL DESCRIPTION

The 74HC/HCT7404 are high-speed Si-gate CMOS

devices specified in compliance with JEDEC standard

no.7A.

The “7404” is an expandable, First-In First-Out (FIFO)

memory organized as 64 words by 5 bits. A guaranteed

15 MHz data-rate makes it ideal for high-speed

applications. A higher data-rate can be obtained in

applications where the status flags are not used

(burst-mode).

With separate controls for shift-in (SI) and shift-out (SO),

reading and writing operations are completely

independent, allowing synchronous and asynchronous

data transfers. Additional controls include a master-reset

input (MR), an output enable input (OE) and flags. The

data-in-ready (DIR) and data-out-ready (DOR) flags

indicate the status of the device.

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns.

Note

1. For HC the condition is VI = GND to VCC.

For HCT the condition is VI = GND to VCC −1.5 V.

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

TYP.

UNIT

HCT

tPHL/tPLH

propagation delay SO, SI to DIR and DOR

CL = 15 pF; VCC = 5 V

fmax

maximum clock frequency

MHz

input capacitance

3.5

CPD

power dissipation capacitance per package

note 1

475

490

EXTENDED

TYPE NUMBER

PACKAGE

PINS

PIN POSITION

MATERIAL

CODE

74HC/HCT7404N

DIL

plastic

SOT102

74HC/HCT7404D

SO20

plastic

SOT163A

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