HANBit

HMD1M4Z1

URL:www.hbe.co.kr

HANBit Electronics Co.,Ltd.

REV.1.0(August.2002)

1

PIN ASSIGNMENT

DESCRIPTION

The HMD1M4Z1 is an 1M x 4 bits Fast Page Mode CMOS DRAMs. Fast Page Mode offers high speed random access of

memory cells

within the same row. Power supply voltage (+5V ), access time (-5, -6), power consumption(Normal or Low power), and package

type (ZIP)

are optional features of this Module. The HMD1M4Z1 have CAS-before-RAS refresh, RAS-only refresh and Hidden

refresh capabilities.

The HMD1M4Z1 is optimized for application to the systems, which are required high density and large capacity such as main

memory for main frames and mini computers, personal computer and high performance microprocessor systems.

The HMD1M4Z1 provides common data and outputs.

Features

w Fast Page Mode operation

w CAS-before-RAS refresh capability

w RAS-only and Hidden refresh capability

w Fast parallel test mode capability

w TTL(5V) compatible inputs and outputs

w Early write or output enable controlled write

w Available in 20pin ZIP packages

w Single +5V

± 10% power supply

w 1,024 Refresh Cycles/16ms

w Performance Range

PIN DESCRIPTION

PIN

SYMBOL

1

/OE

2

/CAS

3

DQ2

4

DQ3

5

6

DQ0

7

DQ1

8

/WE

9

/RAS

10

A9

11

A0

12

A1

13

A2

14

A3

15

16

A4

17

A5

18

A6

19

A7

20

A8

Speed

HMD1M4Z1-5

50

15

90

35

HMD1M4Z1-6

60

15

110

40

PIN

FUNCTION

PIN

FUNCTION

A0

– A9

Address Inputs

/WE

Read/Write

Enable

DQ0

–

DQ3

Data

Input/Output

Vcc

Power

(+5V)

/RAS

Row Address

Strobe

Vss

Ground

/CAS

Column

Address Strobe

NC

No

Connection

/OE

Data Output

Enable

4Mbit(1Mx4bit) Fast Page Mode, 1K Refresh, 20Pin ZIP, 5V Design

Part No.

HMD1M4Z1