IDT709099L_15 datasheet(3/16 Pages) IDT

Part #	IDT709099L

Description	HIGH-SPEED 128K x 8 SYNCHRONOUS PIPELINED DUAL-PORT STATIC RAM

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Manufacturer	IDT [Integrated Device Technology]

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6.42

IDT709099L

High-Speed 128K x 8 Synchronous Pipelined Dual-Port Static RAM

Industrial and Commercial Temperature Ranges

3

NOTES:

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

2. ADS, CNTEN, CNTRST = X.

3. OE is an asynchronous input signal.

Truth Table I—Read/Write and Enable Control(1,2,3)

OE

CLK

CE0

CE1

R/W

I/O0-7

Mode

X

↑

H

X

High-Z

Deselected—Power Down

X

↑

X

L

X

High-Z

Deselected—Power Down

X

↑

LH

L

DATAIN

Write

L

↑

LH

H

DATAOUT

Read

H

X

L

H

X

High-Z

Outputs Disabled

4846 tbl 02

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 - A16L

A0R - A16R

Address

I/O0L - I/O7L

I/O0R - I/O7R

Data Input/Output

CLKL

CLKR

Clock

ADSL

ADSR

Address Strobe

CNTENL

CNTENR

Counter Enable

CNTRSTL

CNTRSTR

Counter Reset

FT

/PIPEL

FT

/PIPER

Flow-Through/Pipeline

VCC

Power

GND

Ground

4846 tbl 01

NOTES:

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

2. CE0 and OE = VIL; CE1 and R/W = VIH.

3. Outputs configured in Flow-Through Output mode: if outputs are in Pipelined mode the data out will be delayed by one cycle.

4. ADS is independent of all other signals including CE0 and CE1.

5. The address counter advances if CNTEN = VIL on the rising edge of CLK, regardless of all other signals including CE0 and CE1.

6. While an external address is being loaded (ADS = VIL), R/W = VIH is recommended to ensure data is not written arbitrarily.

Truth Table II—Address Counter Control(1,2,6)

Address

Addr

Used

CLK

ADS

CNTEN

CNTRST

I/O(3)

Mode

XX

0

↑

XX

L

DI/O(0)

Counter Reset to Address 0

An

X

An

↑

L(4)

XH

DI/O(n)

External Address Utilized

An

Ap

↑

HH

H

DI/O(n)

External Address Blocked—Counter Disabled (Ap reused)

XAp

Ap + 1

↑

H

L(5)

HDI/O(n+1)

Counter Enable—Internal Address Generation

4846 tbl 03

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