Datasheet > U631H256D1C35

U631H256D1C35

更新时间： 2025-07-19 10:13:07

品牌	Logo	应用领域
SIMTEK		静态存储器光电二极管
页数	文件大小	规格书
12页	196K
描述
32KX8 NON-VOLATILE SRAM, 35ns, PDIP28, 0.600 INCH, PLASTIC, DIP-28

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U631H256D1C35 数据手册

U631H256

SoftStore 32K x 8 nvSRAM

Features

Description

The U631H256 has two separate Once a STORE cycle is initiated,

S High-performance CMOS non-

volatile static RAM 32768 x 8 bits modes of operation: SRAM mode further input or output are disabled

S 25, 35 and 45 ns Access Times

S 10, 15 and 20 ns Output Enable

Access Times

and nonvolatile mode. In SRAM until the cycle is completed.

mode, the memory operates as an Because a sequence of addresses

ordinary static RAM. In nonvolatile is used for STORE initiation, it is

operation, data is transferred in important that no other read or

parallel from SRAM to EEPROM or write accesses intervene in the

from EEPROM to SRAM. In this sequence or the sequence will be

mode SRAM functions are disab- aborted.

S Software STORE Initiation

S Automatic STORE Timing

S 10⁶STORE cycles to EEPROM

S 100 years data retention in

EEPROM

led.

Internally, RECALL is a two step

procedure. First, the SRAM data is

S Automatic RECALL on Power Up The U631H256 is a fast static RAM

S Software RECALL Initiation

S Unlimited RECALL cycles from

EEPROM

(25, 35, 45 ns), with a nonvolatile cleared and second, the nonvola-

electrically

erasable

PROM tile information is transferred into

(EEPROM) element incorporated the SRAM cells.

in each static memory cell. The The RECALL operation in no way

SRAM can be read and written an alters the data in the EEPROM

unlimited number of times, while cells. The nonvolatile data can be

independent nonvolatile data resi- recalled an unlimited number of

des in EEPROM. Data transfers times.

S Unlimited Read and Write to

SRAM

S Single 5 V ± 10 % Operation

S Operating temperature ranges:

0 to 70 °C

-40 to 85 °C

from the SRAM to the EEPROM The U631H256 is pin compatible

(the STORE operation), or from the with standard SRAMs.

EEPROM to the SRAM (the

-55 to 125 °C (only 35 ns)

S QS 9000 Quality Standard

S ESD protection > 2000 V

(MIL STD 883C M3015.7-HBM)

S RoHS compliance and Pb- free

S Packages:

RECALL operation) are initiated

through software sequences.

The U631H256 combines the high

performance and ease of use of a

PDIP28 (600 mil, only C/K-Type)

SOP28 (330 mil)

fast SRAM with nonvolatile data

integrity.

Pin Description

Pin Configuration

A14

A12

VCC

A13

A11

Signal Name Signal Description

A0 - A14

DQ0 - DQ7

Address Inputs

Data In/Out

PDIP

SOP

Chip Enable

Output Enable

Write Enable

Power Supply Voltage

Ground

A10

VCC

VSS

DQ7

DQ6

DQ5

DQ4

DQ3

DQ0

DQ1

DQ2

VSS

Top View

April 7, 2005

12 3 4 5 6 7...12

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与U631H256D1C35相关器件

型号	品牌	获取价格	描述	数据表
U631H256D1C35G1	CYPRESS	获取价格	32KX8 NON-VOLATILE SRAM, 35ns, PDIP28, 0.600 INCH, GREEN, PLASTIC, DIP-28
U631H256D1C45	SIMTEK	获取价格	Non-Volatile SRAM, 32KX8, 45ns, CMOS, PDIP28, 0.600 INCH, PLASTIC, DIP-28
U631H256D1C45G1	SIMTEK	获取价格	Non-Volatile SRAM, 32KX8, 45ns, CMOS, PDIP28, 0.600 INCH, GREEN, PLASTIC, DIP-28
U631H256D1K25	SIMTEK	获取价格	32KX8 NON-VOLATILE SRAM, 25ns, PDIP28, 0.600 INCH, PLASTIC, DIP-28
U631H256D1K35	SIMTEK	获取价格	Non-Volatile SRAM, 32KX8, 35ns, CMOS, PDIP28, 0.600 INCH, PLASTIC, DIP-28
U631H256D1K45	SIMTEK	获取价格	Non-Volatile SRAM, 32KX8, 45ns, CMOS, PDIP28, 0.600 INCH, PLASTIC, DIP-28
U631H256D1K45G1	CYPRESS	获取价格	32KX8 NON-VOLATILE SRAM, 45ns, PDIP28, 0.600 INCH, GREEN, PLASTIC, DIP-28
U631H256DC45G1	CYPRESS	获取价格	32KX8 NON-VOLATILE SRAM, 45ns, PDIP28, 0.300 INCH, LEAD FREE, PLASTIC, DIP-28
U631H256S2C25G1	SIMTEK	获取价格	SoftStore 32K x 8 nvSRAM
U631H256S2C35	SIMTEK	获取价格	Non-Volatile SRAM, 32KX8, 35ns, CMOS, PDSO28, 0.330 INCH, SOP2-28

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