HT8658 datasheet(4/15 Pages) HOLTEK

4 / 15 page

Pad No.

Pad Name

I/O

Internal

Connection

Description

18~20

CAS1B~

CAS3B

CMOS

Column address strobe for DRAM1~DRAM3

LEDB

Open Drain

NMOS

Status indicator when LSI is active

PLYB

Pull-High

Play/Pause trigger input (toggle function)

RECB

Pull-High

Record/Pause trigger input (toggle function)

RESB

Pull-High

Reset the system or the play counter

WRB

CMOS

Write enable signal output for DRAM interface

RASB

CMOS

Row address strobe output for DRAM interface

DATA

I/O

—

Encoded data I/O pin

OSC2

OSC1

—

Oscillation external resistor connect pin

Absolute Maximum Ratings

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

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

°C to 125°C

Input Voltage ............... VSS–0.3 Vto VDD+0.3V

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

°C to 70°C

Electrical Characteristics

(Ta=25°C)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VDD

Condition

VDD

Operating Voltage

—

4.5

5.0

5.5

IDD

Operating Current

No load,

FOSC=384KHz

—0.8

2.0

ISTB

Stand-By Current

—

100

µA

IOL

LED Sink Current

VOL=0.5V

3.0

5.0

—

VIH

“H” Input Voltage

—

0.7VDD

—VDD

VIL

“L” Input Voltagse

—

0.2VDD

FOSC

System Frequency

ROSC=91K

—

384

—

KHz

VOUT

Max. Vout Output Voltage

RL>50K

1.5

—

VP-P

HT8658/HT8659

26th Sep ’96

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