U631H64 Просмотр технического описания (PDF) - Simtek Corporation

Номер в каталоге

Компоненты Описание

Список матч

U631H64

SoftStore 8K x 8 nvSRAM

Simtek Corporation 

U631H64

Due to this automatic RECALL, SRAM operation

cannot commence until tRESTORE after VCC exceeds

VSWITCH.

If the U631H64 is in a WRITE state at the end of power

up RECALL, the SRAM data will be corrupted.

To help avoid this situation, a 10 KΩ resistor should be

connected between W and VCC.

Hardware Protection

The U631H64 offers hardware protection against inad-

vertent STORE operation through VCC sense.

For VCC < VSWITCH the software initiated STORE opera-

tion will be inhibited.

Low Average Active Power

The U631H64 has been designed to draw significantly

less power when E is LOW (chip enabled) but the

access cycle time is longer than 55 ns.

When E is HIGH the chip consumes only standby cur-

rent.

The overall average current drawn by the part depends

on the following items:

1. CMOS or TTL input levels

2. the time during which the chip is disabled (E HIGH)

3. the cycle time for accesses (E LOW)

4. the ratio of READs to WRITEs

5. the operating temperature

6. the VCC level

The information describes the type of component and shall not be considered as assured characteristics. Terms of

delivery and rights to change design reserved.

March 31, 2006

STK Control #ML0045

11

Rev 1.0

Share Link: