DESCRIPTION

The TC514256AP/AJ/AZ is the new generation dynamic RAM organized 262,144 words by 4 bits.

The TC514256AP/AJ/AZ utilizes TOSHIBA's CMOS Silicon gate process technology as well as advanced

circuit techniques to provide wide operating margins, both internally and to the system user.

Multiplexed address inputs permit the TC514256AP/AJ/AZ to be packaged in a standard 20 pin plastic

DIP, 26/20 pin plastic SOJ and 20/19 pin plastic ZIP. The package size provides high system bit

densities and is compatible with widely available automated testing and insertion equipment.

oriented features include single power supply of 5V±10 tolerance, direct interfacing capability with

high performance logic families such as Schottky TTL.

System

FEATURES

262,144 word by 4 bit organization

Fast access time and cycle time

trai

TAA

teac

tac

Columuess

Acces inse

CAS Access Time

Cycle Time

Fast Page Mode

Cycle Time

TCS14256AP/AJAZ-701-801-10

80ns

70ns

35ns

20ns

130ns

40ns

40ns

20ns

150ns

45ns

Single power supply of 5V±10

with a built-in VBB generator

100ns

50ns

25ns

180ns

55ns

? Low Power

440mW MAX. Operating

(TC514256AP/AJ/AZ-70)

385mW MAX. Operating

(TC514256AP/āJ/AZ-80)

330mW MAX. Operating

(TC514256AP/AJ/AZ-10)

5.5mW MAX. Standby

Outputs 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 and outputs TTL compatible

512 refresh cycles/8ms

? Package

TC514256AP : DIP20-P-300B

TC514256AJ : SOJ26-P-300

TC514256AZ : ZIP20-P-400