IDT54/74FCT162701T/AT

FAST CMOS 18-BIT R/W BUFFER

MILITARY AND COMMERCIAL TEMPERATURE RANGES

5.15

3

PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

(1)

°C, f = 1.0MHz)

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NOTE:

1. This parameter is measured at characterization but not tested.

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Symbol

Conditions

Typ.

Max.

Unit

Input

Capacitance

3.5

6.0

pF

I/O

Capacitance

3.5

8.0

pF

Pin Names

I/O

Description

I/O

18 bit I/O port.

I/O

18 bit I/O port.

CLK

I

Clock for write path FIFO. Clocks data into FIFO when

WCE is low, clocks data out of FIFO when RCE is

low. When FIFO is full all further writes to the FIFO are inhibited. When FIFO is empty all reads from the

FIFO are inhibited. CLK also resets the FIFO when

RESET is low.

WCE

I

Enable pin for FIFO input clock.

RCE

I

Enable pin for FIFO output clock.

FF

O

Write path FIFO full flag. Goes low when FIFO is full.

RESET

I

Synchronous FIFO reset - when low CLK resets the FIFO. The FIFO pointers are initialized to the

"empty" condition and FIFO output is forced high (all ones). The FIFO full flag (

FF) will be high

immediately after reset.

OEAB

I

Output Enable pin for B port.

OEBA

I

Output Enable pin for A port.

LE

I

Read path latch enable pin. When high, data flows transparently from B port to A port, B data is latched

on the falling edge of LE.

Symbol

Description

Max.

Unit

GND

–0.5 to +7.0

V

GND

–0.5 to

V

Storage Temperature

–65 to +150

°C

DC Output Current

–60 to +120

mA

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-

INGS may cause permanent damage to the device. This is a stress rating

only and functional operation of the device at these or any other conditions

above those indicated in the operational sections of this specification is

not implied.

Exposure to absolute maximum rating conditions for

extended periods may affect reliability.

2. All device terminals except FCT162XXXT Output and I/O terminals.

3. Output and I/O terminals for FCT162XXXT.

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