Pin No. Pin Name I/O

Internal

Connection

Description

13

A5

O

CMOS OUT

Connects to DRAM A5

14

A4

O

CMOS OUT

Connects to DRAM A4

15

A3

O

CMOS OUT

Connects to DRAM A3

16

A2

O

CMOS OUT

Connects to DRAM A2

17

A1

O

CMOS OUT

Connects to DRAM A1

18

A0

O

CMOS OUT

Connects to DRAM A0

19

RASB

O

CMOS OUT

Connects to DRAM RASB

20

WRB

O

CMOS OUT

Connects to DRAM WRB

21

DATA

I/O

CMOS I/O

Data I/O pin

22

A8

O

CMOS I/O

Connects to DRAM A8

23

CASB

O

CMOS I/O

Connects to DRAM CASB

24

VDD

I

—

Positive power supply

Absolute Maximum Ratings*

Supply Voltage ................................. –0.3V to 6V

Storage Temperature................. –50

Operating Temperature............... –20

*Note: These are stress ratings only. Stresses exceeding the range specified under “Absolute Maxi-

mum Ratings” may cause substantial damage to the device. Functional operation of this

device at other conditions beyond those listed in the specification is not implied and prolonged

exposure to extreme conditions may affect device reliability.

Electrical Characteristics

(Ta=25

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

—

—

4.5

5.0

5.5

V

Operating Current

5V

No load,

—2.5

8

mA

Pre-amplifier Voltage Gain

5V

Ω

Open loop

—

2000—V/V

Comparator Voltage Gain

5V

Ω

Open loop

—

2000—V/V

“L” Input Voltage

—

—

0

—

V

HT8955A

3

5th May ’98