SNR008

8M-bit Mask ROM

1. INTRODUCTION

The SNR008 is a signal power, 8M-bit, read only memory. It is organized as 1M bytes,

operates for single 3V power supply, support static standby mode. The SNR008

embedded two different interfaces, one is a standard 8-bit interface bus which

compatible with SNL310, another one is a special 8-bit AD (address/data) bus which

compatible with SNC710.

SNR008 offers automatic power-down, with power-down controlled by the chip enable

“CE\”. When chip enable goes to high, SNR008 will entry power-down mode in order to

save the power consumption.

2. FEATURES

Power supply: 2.4V ~ 3.6V

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Memory Size: 8M-bit

Totally static operation

Embedded a standard 8-bit bus interface compatible with SNL310 or a 8-bit AD

(address/data) bus interface compatible with SNC710

Access time: 200ns @3V

3. PIN ASSIGNMENTS

Symbol

I/O

Standard ROM interface

AD Bus interface

TYPE

I 1: Standard ROM type

0: AD Bus interface

A[8..19]

I Standard ROM Address [8..19]

NC

A[7]

I Standard ROM Address A7

TESTM

A[6]

I Standard ROM Address A6

Bank Select 4

A[5]

I Standard ROM Address A5

Bank Select 3

A[4]

I Standard ROM Address A4

Bank Select 2

A[3]

I Standard ROM Address A3

Bank Select 1

A[2]

I Standard ROM Address A2

Bank Select 0

A[1]

I Standard ROM Address A1

ALECLK

A[0]

I Standard ROM Address A0

READY

D[0..7]

I/O Standard ROM Data [0..7]

Address/Data bus [0..7]

CEB

I Standard ROM Chip Enable

Chip Enable

OEB

I Standard ROM Output Enable

NC

VDD

P 3.3volt Positive Power supply

3.3volt Positive Power supply

GND

P Ground

Ground

Ver. 1.3

August 29, 2003

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