TM124MBK36E, TM124MBK36T 1048576 BY 36-BIT DYNAMIC RAM MODULE
TM248NBK36E, TM248NBK36T 2097152 BY 36-BIT DYNAMIC RAM MODULE
SMMS139 – MARCH 1994
•
Organization
TM124MBK36E . . . 1 048 576 × 36
TM248NBK36E . . . 2 097 152 × 36
•
Enhanced Page-Mode Operation With
CAS-Before-RAS, RAS-Only, and Hidden
Refresh
•
•
Single 5-V Power Supply (±10% Tolerance)
•
•
Presence Detect
72-Pin Leadless Single-In-Line Memory
Module (SIMM)
Performance Ranges:
ACCESS ACCESS ACCESS READ
TIME
TIME
TIME
OR
•
TM124MBK36E – Utilizes Eight 4-Megabit
Dynamic RAMs in Plastic Small-Outline
J-Lead (SOJ) Packages and Two 2-Megabit
Dual-CAS Dynamic RAMs in Plastic
t
t
t
WRITE
CYCLE
(MIN)
RAC
AA
CAC
(MAX)
’124MBK36E-60 60 ns
’124MBK36E-70 70 ns
’124MBK36E-80 80 ns
’248NBK36E-60 60 ns
’248NBK36E-70 70 ns
’248NBK36E-80 80 ns
(MAX)
30 ns
35 ns
40 ns
30 ns
35 ns
40 ns
(MAX)
15 ns
18 ns
20 ns
15 ns
18 ns
20 ns
110 ns
130 ns
150 ns
110 ns
130 ns
150 ns
Small-Outline J-Lead (SOJ) Packages
•
TM248NBK36E – Utilizes Sixteen 4-Megabit
Dynamic RAMs in Plastic Small-Outline
J-Lead (SOJ) Packages and Four 2-Megabit
Dual-CAS Dynamic RAMs in Plastic
•
•
Low Power Dissipation
Small-Outline J-Lead (SOJ) Packages
Operating Free-Air Temperature Range:
•
•
Long Refresh Period . . . 16 ms
(1024 Cycles)
0°C to 70°C
†
•
•
Gold-Tabbed Versions Available:
– TM124MBK36E
– TM248NBK36E
All Inputs, Outputs, Clocks Fully TTL
Compatible
•
•
3-State Output
Tin-Lead (Solder) Tabbed Versions
Available:
– TM124MBK36T
Common CAS Control for Nine Common
Data-In and Data-Out Lines in Four Blocks
– TM248NBK36T
description
The TM124MBK36E is a dynamic random-access memory (RAM) organized as four times 1048576 × 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 dynamic RAMs, each in a 20/26-lead plastic small-outline
J-lead (SOJ) package, and two TMS42260DJ, 1 048 576 × 2-bit dual-CAS dynamic RAMs, each in a 24/26-lead
plastic small-outline J-lead (SOJ) package, mounted on a substrate with decoupling capacitors. Each
TMS44400DJ or TMS42260DJ is described in the TMS44400 or TMS42260 data sheet, respectively.
The TM124MBK36E is available in the single-sided BK leadless module for use with sockets. It features RAS
access times of 60 ns, 70 ns, and 80 ns. This device is characterized for operation from 0°C to 70°C.
The TM248NBK36E is a dynamic random-access memory (RAM) organized as four times 2 097 152 × 9 (bit 9
is generally used for parity) in a 72-pin leadless single-in-line memory module (SIMM). The SIMM is composed
of sixteen TMS44400DJ, 1 048 576 × 4-bit dynamic RAMs, each in a 20/26-lead plastic small-outline J-lead
(SOJ)package, andfourTMS42260DJ, 1 048 576× 2-bitdual-CASdynamicRAMs, eachina24/26-leadplastic
small-outline J-lead (SOJ) package, mounted on a substrate with decoupling capacitors. Each TMS44400DJ
or TMS42260DJ is described in the TMS44400 or TMS42260 data sheet, respectively.
The TM248NBK36E is available in the double-sided BK leadless module for use with sockets. It features RAS
access times of 60 ns, 70 ns, and 80 ns. This device is rated 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.
Copyright 1994, Texas Instruments Incorporated
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.
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