based on 8Mx16 SDRAM with LVTTL, 4 banks & 4K Refresh
HYM71V8M655A(L)TU6 Series
DESCRIPTION
The Hynix HYM71V8M655ATU6 Series are 8Mx64bits Synchronous DRAM Modules. The modules are composed of four 8Mx16bits
CMOS Synchronous DRAMs in 400mil 54pin TSOP-II package, one 2Kbit EEPROM in 8pin TSSOP package on a 144pin glass-epoxy
printed circuit board. Two 0.33uF and one 0.1uF decoupling capacitors per each SDRAM are mounted on the PCB.
The Hynix HYM71V8M655ATU6 Series are Dual In-line Memory Modules suitable for easy interchange and addition of 64Mbytes
memory. The Hynix HYM71V8M655ATU6 Series are fully synchronous operation referenced to the positive edge of the clock . All
inputs and outputs are synchronized with the rising edge of the clock input. The data paths are internally pipelined to achieve very high
bandwidth.
FEATURES
•
•
•
•
PC100MHz support
144pin SDRAM Micro SO DIMM
Serial Presence Detect with EEPROM
1.18” (30.00mm) Height PCB with double sided com-
ponents
Single 3.3±0.3V power supply
- 1, 2, 4 or 8 or Full page for Sequential Burst
•
•
All device pins are compatible with LVTTL interface
- 1, 2, 4 or 8 for Interleave Burst
Data mask function by DQM
•
Programmable CAS Latency ; 2, 3 Clocks
•
•
•
•
•
•
SDRAM internal banks : four banks
Module bank : one physical bank
Auto refresh and self refresh
4096 refresh cycles / 64ms
Programmable Burst Length and Burst Type
ORDERING INFORMATION
Part No.
HYM71V8M655HCTU6-8
HYM71V8M655HCTU6-P
HYM71V8M655HCTU6-S
HYM71V8M655HCLTU6-8
HYM71V8M655HCLTU6-P
HYM71V8M655HCLTU6-S
Clock
Frequency
125MHz
100MHz
100MHz
125MHz
100MHz
100MHz
Internal
Bank
Ref.
Power
SDRAM
Package
Plating
Normal
4 Banks
4K
Low Power
TSOP-II
Gold
This document is a general product description and is subject to change without notice. Hynix Semiconductor Inc. does not assume any responsibility for
use of circuits described. No patent licenses are implied.
Rev. 0.3/Dec.
01
2
PC100 SDRAM SO DIMM
HYM71V8M655A(L)TU6 Series
PIN DESCRIPTION
PIN
CK0, CK1
CKE0
/S0
BA0, BA1
A0 ~ A11
/RAS, /CAS, /WE
DQM0~DQM7
DQ0 ~ DQ63
VCC
V
SS
SCL
SDA
NC
PIN NAME
Clock Inputs
Clock Enable
Chip Select
SDRAM Bank Address
Address
Row Address Strobe, Column
Address Strobe, Write Enable
Data Input/Output Mask
Data Input/Output
Power Supply (3.3V)
Ground
SPD Clock Input
SPD Data Input/Output
No Connection
DESCRIPTION
The system clock input. All other inputs are registered to the SDRAM on the
rising edge of CLK
Controls internal clock signal and when deactivated, the SDRAM will be one
of the states among power down, suspend or self refresh
Enables or disables all inputs except CK, CKE and DQM
Selects bank to be activated during /RAS activity
Selects bank to be read/written during /CAS activity
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