Siemens HYM328020GD-50, HYM328020GD-60 Datasheet

8M × 32-Bit Dynamic RAM Module
SMALL OUTLINE MEMORY MODULE

Preliminary Information

• 8 388 608 words by 32-bit organization

• Fast access and cycle time

50 ns access time

95 ns cycle time (-50 version)

60 ns access time

110 ns cycle time (-60 version)

• Fast page mode capability with

35 ns cycle time (-50 version)
40 ns cycle time (-60 version)

• Single + 3.3 V (± 0.3 V) supply

• Low power dissipation

max. 2016 mW active (-50 version)
max. 1728 mW active (-60 version)

HYM 328020GD-50/-60

LVCMOS– 3.6 mW standby
LVTTL – 28.8 mW standby

• CAS-before-RAS refresh, RAS-only-refresh, Self Refresh

• 4 decoupling capacitors mounted on substrate

• All inputs, outputs and clock fully TTL compatible

• 72 pin, dual read-out, two bank, Small Outline DIMM Module

• Utilizes four 4M × 16 -DRAMs (HYB 3165160T)

• 4096 refresh cycles / 64 ms

• Gold contact pad

Semiconductor Group 195

11.94

HYM328020GD-50/-60

8M x 32 SO-DIMM

The HYM 328020GD -50/-60 is a 32 MByte DRAM module organized as 8 388 608 words by 32-bit
in a 72-pin, dual read-out, small outline package comprising four HYB 3165160T 4M × 16 DRAMs
in 500 mil wide TSOPII-54 - packages mounted together with four 0.2 µF ceramic decoupling
capacitors on a PC board. Each HYB 3165800T is described in the data sheet and is fully
electrically tested and processed according to Siemens standard quality procedure prior to module
assembly. After assembly onto the board, a further set of electrical tests is performed.

The density and speed of the module can be detected by the use of presence detect pins.
These modules are ideal for portable systems applications where high memory capacity is needed.

Ordering Information
Type Ordering Code Package Descriptions

HYM 328020GD -50 on request L-DIM-72-2 50 ns DRAM module
HYM 328020GD -60 on request L-DIM-72-2 60 ns DRAM module

Pin Names

A0-A11 Row Address Input
A0-A9 Column Address Inputs
DQ0 - DQ31 Data Input/Output
RAS0 - RAS3 Row Address Strobe
CAS0 - CAS3 Column Address Strobe
WE Read / Write Input
Vcc Power (+3.3 Volt)
Vss Ground
PD1 - PD7 Presence Detect Pins
N.C. No Connection

Presence-Detect and ID-pin Thruth Table *):

Module PD1 PD2 PD3 PD4 PD5 PD6 PD7
HYM 328020GD -50 NC NC VSS VSS VSS VSS NC
HYM 328020GD -60 NC NC VSS VSS NC NC NC

note: PD1 .. PD4 : configuration

PD5 .. PD6 : speed

PD7 : refresh mode (NC = normal refresh)
*) according to JEDEC letter ballot JC-42.5-95 Item #646/651

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