TM2SR72EPN 2ā097ā152 BY 72ĆBIT TM4SR72EPN 4ā194ā304 BY 72ĆBIT SYNCHRONOUS DYNAMIC RAM MODULES
SMMS698A − JUNE 1997 − REV...
TM2SR72EPN 2ā097ā152 BY 72ĆBIT TM4SR72EPN 4ā194ā304 BY 72ĆBIT SYNCHRONOUS DYNAMIC RAM MODULES
SMMS698A − JUNE 1997 − REVISED FEBRUARY 1998
D Organization
− TM2SR72EPN . . . 2 097 152 x 72 Bits − TM4SR72EPN . . . 4 194 304 x 72 Bits
D Single 3.3-V Power Supply
(±10% Tolerance)
D Designed for 66-MHz 4-Clock Systems D JEDEC 168-Pin Dual-In-Line Memory
Module (DIMM) Without Buffer for Use With Socket
D TM2SR72EPN — Uses Nine 16M-Bit
Synchronous Dynamic RAMs (SDRAMs) (2M × 8-Bit) in Plastic Thin Small-Outline Packages (TSOPs)
D TM4SR72EPN — Uses 18 16M-Bit SDRAMs
(2M × 8-Bit) in Plastic TSOPs
D Performance Ranges:
D
D D D
D
D
D
D D D
SYNCHRONOUS
CLOCK CYCLE
TIME
tCK3
tCK2
(CL = 3)† (CL = 2)
’xSR72EPN-10
10 ns
† CL = CAS latency
15 ns
ACCESS TIME
(CLOCK TO
OUTPUT)
tAC3
tAC2
(CL = 3) (CL = 2)
7.5 ns
7 ns
REFRESH INTERVAL
64 ms
High-Speed, Low-Noise Low-
Voltage TTL (LVTTL) Interface
Byte-Read/Write Capability
Read Latencies 2 and 3 Supported
Support Burst-Interleave and Burst-Interrupt Operations
Burst Length Programmable to 1, 2, 4, and 8
Two Banks for On-Chip Interleaving (Gapless Access)
Ambient Temperature Range 0°C to 70°C Gold-Plated Contacts
Pipeline Architecture
Serial Presence Detect (SPD) Using EEPROM
description
The TM2SR72EPN is a 16M-byte, 168-pin dual-in-line memory module (DIMM). The DIMM is composed of nine TMS626812ADGE, 2 097 152 x 8-bit SDRAMs, each in a 400-mil, 44-pin plastic thin small-outline package (TSOP) mounted on a substrate with dec...