TM124MBK36C Datasheet, PDF (1/11 Pages) Texas Instruments – DYNAMIC RAM MODULE

TM124MBK36C, TM124MBK36S 1048576 BY 36-BIT
TM248NBK36C, TM248NBK36S 2097152 BY 36-BIT
DYNAMIC RAM MODULE
SMMS138B – MARCH 1992 – REVISED JUNE 1995
D Organization
TM124MBK36C . . . 1 048 576 × 36
TM248NBK36C . . . 2 097152 × 36
D Single 5-V Power Supply (±10% Tolerance)
D 72-pin Leadless Single In-Line Memory
Module (SIMM)
D TM124MBK36C – Utilizes Eight 4-Megabit
DRAMs in Plastic Small-Outline J-Lead
(SOJ) Packages and Two 4-Megabit
Quad-CAS DRAMs in Plastic SOJ Packages
D TM248NBK36C – Utilizes Sixteen 4-Megabit
DRAMs in Plastic SOJ Packages and Four
4-Megabit Quad-CAS DRAMs in Plastic SOJ
Packages
D Long Refresh Period
16 ms (1024 Cycles)
D All Inputs, Outputs, Clocks Fully TTL
Compatible
D 3-State Output
D Common CAS Control for Nine Common
Data-In and Data-Out Lines, in Four Blocks
D Enhanced Page Mode Operation With
CAS-Before-RAS ( CBR), RAS-Only, and
Hidden Refresh
D Presence Detect
D Performance Ranges:
ACCESS ACCESS ACCESS READ
TIME
TIME TIME OR
tRAC
tAA
tCAC WRITE
CYCLE
(MAX)
(MAX) (MAX) (MIN)
′124MBK36C-60 60 ns
′124MBK36C-70 70 ns
′124MBK36C-80 80 ns
′248NBK36C-60 60 ns
30 ns
35 ns
40 ns
30 ns
15 ns
18 ns
20 ns
15 ns
110 ns
130 ns
150 ns
110 ns
′248NBK36C-70 70 ns
35 ns 18 ns 130 ns
′248NBK36C-80 80 ns
40 ns
D Low Power Dissipation
20 ns 150 ns
D Operating Free-Air-Temperature Range
0°C to 70°C
D Gold-Tabbed Versions Available:^†
– TM124MBK36C
– TM248NBK36C
D Tin-Lead (Solder) Tabbed Versions
– TM124MBK36S
– TM248NBK36S
description
TM124MBK36C
The TM124MBK36C is a dynamic random-access memory (DRAM) organized as four times 1 048 576 × 9 (bit
9 is generally used for parity) in a 72-pin leadless single in-line memory module (SIMM). The SIMM is composed
of eight TMS44400DJ, 1 048 576 × 4-bit DRAMs, each in 20/26-lead plastic small-outline J-lead packages
(SOJs), and two TMS44460DJ, 1 048 576 × 4-bit Quad-CAS DRAMs, in 24/26-lead plastic SOJs mounted on
a substrate with decoupling capacitors. Each TMS44400DJ and TMS44460DJ is described in the TMS44400
and TMS44460 data sheets, respectively.
The TM124MBK36C is available in the single-sided BK leadless module for use with sockets.
The TM124MBK36C features RAS access times of 60 ns, 70 ns, and 80 ns. This device is characterized for
operation from 0°C to 70°C.
† _{Part numbers in this data sheet are for the gold-tabbed version; the information applies to both gold-tabbed and solder-tabbed versions.}
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1995, Texas Instruments Incorporated
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251–1443
1