IDT70V3389S4PRFI datasheet(5/17 Pages) IDT

Part #	IDT70V3389S4PRFI

Description	HIGH-SPEED 3.3V 64K x 18 SYNCHRONOUS PIPELINED DUAL-PORT STATIC RAM WITH 3.3V OR 2.5V INTERFACE

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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5 / 17 page

6.42

IDT70V3389S

High-Speed 64K x 18 Dual-Port Synchronous Pipelined Static RAM

Industrial and Commercial Temperature Ranges

5

NOTES:

1. "H" = VIH, "L" = VIL, "X" = Don't Care.

2.

ADS, CNTEN, CNTRST = VIH.

3.

OE is an asynchronous input signal.

Truth Table IRead/Write and Enable Control(1,2,3)

Pin Names

Left Port

Right Port

Names

CE0L, CE1L

CE0R, CE1R

Chip Enables

R/WL

R/WR

Read/Write Enable

OEL

OER

Output Enable

A0L - A15L

A0R - A15R

Address

I/O0L - I/O17L

I/O0R - I/O17R

Data Input/Output

CLKL

CLKR

Clock

ADSL

ADSR

Address Strobe Enable

CNTENL

CNTENR

Counter Enable

CNTRSTL

CNTRSTR

Counter Reset

UBL - LBL

UBR - LBR

Byte Enables (9-bit bytes)

VDDQL

VDDQR

Power (I/O Bus) (3.3V or 2.5V)(1)

OPTL

OPTR

Option for selecting VDDQX(1,2)

VDD

Power (3.3V)

(1)

VSS

Ground (0V)

4832 tbl 01

OE

CLK

CE0

CE1

UB

LB

R/

W

Upper Byte

I/O9-18

Lower Byte

I/O0-8

MODE

X

↑

L

H

X

High-Z

All Bytes Deselected

X

↑

LH

H

L

High-Z

DIN

Write to Lower Byte Only

X

↑

LH

L

H

L

DIN

High-Z

Write to Upper Byte Only

X

↑

L

H

LLL

DIN

Write to Both Bytes

L

↑

LH

H

L

H

High-Z

DOUT

Read Lower Byte Only

L

↑

LH

L

H

DOUT

High-Z

Read Upper Byte Only

L

↑

LH

L

H

DOUT

Read Both Bytes

H

↑

L

H

L

X

High-Z

Outputs Disabled

4832 tbl 02

NOTES:

1. VDD, OPTX, and VDDQX must be set to appropriate operating levels prior to

applying inputs on the I/Os and controls for that port.

2. OPTX selects the operating voltage levels for the I/Os and controls on that port.

If OPTX is set to VIH (3.3V), then that port's I/Os and controls will operate at 3.3V

levels and VDDQX must be supplied at 3.3V. If OPTX is set to VIL (0V), then that

port's I/Os and controls will operate at 2.5V levels and VDDQX must be supplied

at 2.5V. The OPT pins are independent of one another—both ports can operate

at 3.3V levels, both can operate at 2.5V levels, or either can operate at 3.3V

with the other at 2.5V.

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