©2001 Silicon Storage Technology, Inc.

S71134-02-000

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The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.

ComboMemory is a trademark of Silicon Storage Technology, Inc.

These specifications are subject to change without notice.

Preliminary Specifications

FEATURES:

•

ROM + SRAM ROM/RAM Combo

– SST30VR041: 512K x8 ROM + 128K x8 SRAM

– SST30VR043: 512K x8 ROM + 32K x8 SRAM

•

ROM/RAM combo on a monolithic chip

•

Equivalent ComboMemory (Flash + SRAM):

SST31LF041A for code development and

pre-production

•

Wide Operating Voltage Range: 2.7-3.3V

•

Chip Access Time

– SST30VR041

70 ns and 150 ns

– SST30VR043 150 ns

•

Low Power Dissipation:

– Standby:

1.0 µW (Typical)

– Operating: 3.0 mW (Typical)

•

Fully Static Operation

– No clock or refresh required

•

Three state Outputs

•

Packages Available

– 32-pin TSOP (8mm x14mm)

PRODUCT DESCRIPTION

The SST30VR041/043 are ROM/RAM combo chips con-

sisting of 4 Mbit Read Only Memory organized as 512

KBytes and a Static Random Access Memory organized

as either 128 or 32 KBytes. Output Enable Input (OE#) is

pin-shared with RAMCS# (RAM Enable Input) signal in

order to maintain the standard 32-pin TSOP package.

The device is fabricated using SST’s advanced CMOS low

power process technology.

The SST30VR041/043 have an output enable input for pre-

cise control of the data outputs. It also has two (2) separate

chip enable inputs for selection of either RAM or ROM and

for minimizing current drain during power-down mode.

The SST30VR041/043 is particularly well suited for use in

low voltage (2.7-3.3V) supplies such as pagers, organizers

and other handheld applications.

RAMCS#

OE#/RAMCS#

ROMCS#

WE#

AMS-A0

Note: AMS = Most Significant Address

DQ7-DQ0

ROMCS#

RAM

ROM

WE#

OE#

OE#

381 ILL B1.2

4 Mbit ROM + 1 Mbit / 256 Kbit SRAM ROM/RAM Combo

SST30VR041 / SST30VR043

SST30VR041/0434 Mb Mask ROM (x8) + 1 Mb / 256 Kbit SRAM (x8) Combo