HYB514256B-70 datasheet(1/22 Pages) SIEMENS

Part #	HYB514256B-70

Description	256 K x 4-Bit Dynamic RAM Low Power 256 K x 4-Bit Dynamic RAM

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Manufacturer	SIEMENS [Siemens Semiconductor Group]

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Semiconductor Group

55

01.95

•

262 144 words by 4-bit organization

•

Fast access and cycle time

50 ns access time

95 ns cycle time (-50 version)

60 ns access time

110 ns cycle time (-60 version)

70 ns access time

130 ns cycle time (-70 version)

•

Fast page mode cycle time

35 ns (-50 version)

40 ns (-60 version)

45 ns (-70 version)

•

Low power dissipation

max. 495 mW active (-50 version)

max. 440 mW active (-60 version)

max. 385 mW active (-70 version)

max. 5.5 mW standby

max. 1.1 mW standby for L-version

Ordering Information

Type

Ordering Code

Package

Description

HYB 514256B-50

Q67100-Q1044

P-DIP-20-2

DRAM (access time 50ns)

HYB 514256B-60

Q67100-Q530

P-DIP-20-2

DRAM (access time 60 ns)

HYB 514256B-70

Q67100-Q433

P-DIP-20-2

DRAM (access time 70 ns)

HYB 514256BJ-50

Q67100-Q1054

P-SOJ-26/20-1

DRAM (access time 50 ns)

HYB 514256BJ-60

Q67100-Q536

P-SOJ-26/20-1

DRAM (access time 60 ns)

HYB 514256BJ-70

Q67100-Q537

P-SOJ-26/20-1

DRAM (access time 70 ns)

HYB 514256BL-50

on request

P-DIP-20-2

DRAM (access time 50 ns)

HYB 514256BL-60

Q67100-Q542

P-DIP-20-2

DRAM (access time 60 ns)

HYB 514256BL-70

Q67100-Q543

P-DIP-20-2

DRAM (access time 70 ns)

HYB 514256BJL-50

on request

P-SOJ-26/20-1

DRAM (access time 50 ns)

HYB 514256BJL-60

Q67100-Q608

P-SOJ-26/20-1

DRAM (access time 60 ns)

HYB 514256BJL-70

Q67100-Q607

P-SOJ-26/20-1

DRAM (access time 70 ns)

256 K

× 4-Bit Dynamic RAM

Low Power 256 K

× 4-Bit Dynamic RAM

Advanced Information

•

Single + 5 V (

± 10 %) supply with a built-in V

BB

generator

•

Output unlatched at cycle end allows two-

dimensional chip selection

•

Read-modify-write, CAS-before-RAS

refresh, RAS-only refresh, hidden-refresh

and fast page mode capability

•

All inputs, outputs and clocks

TTL-compatible

•

512 refresh cycles/8 ms

512 refresh cycles/64 ms

for L-version only

•

Plastic Packages:

P-DIP-20-2,

P-SOJ-26/20-1

HYB 514256B/BJ-50/-60/-70

HYB 514256BL/BJL-50/-60/-70

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HYB514256B-70 Datasheet(PDF) 1 Page - Siemens Semiconductor Group

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