LX1670 View Datasheet(PDF) - Microsemi Corporation

Part Name

Description

Manufacturer

LX1670

5 - BIT PROGRAMMABLE VOTAGE REFERENCE

Microsemi Corporation 

PRODUCT DATABOOK 1996/1997

5-BI T PROGRAMMABLE VOLTAGE REFERENCE

PR O D U C T I O N D ATA S H E E T

LX1670

BLKEN 6

D0 8

D1 9

D2 10

D3 11

D4B 13

D4 12

BLOCK

< 1.8V

DAC

BLOCK DIAGRAM

2V REF

1

0

S 2X1

MUX

OUT

0.87 * VS

0.935 * VS

14 VCC

4.67/4.47V

10.6/10.1V

5 ENABLE

VCC

4 OVOUT

3 PGOOD

GND 7

Pin Name

VIDO

VSENSE

PGOOD

OV OUT

ENABLE

BLKEN

GND

D0

D1

D2

D3

D4

D4B

VCC

0.93 * VE

1

VIDO

VE

VS

2 VSENSE

Pin #

1

2

3

4

5

6

7

8

9

10

11

12

13

14

FUNCTIONAL PIN DESCRIPTION

Description

Output reference voltage used by PWM controller to set system voltage.

Connected directly to system output voltage.

Open collector output pulls low when the processor's supply is not good.

SCR Driver goes high when processor supply is over voltage.

TTL compatible chip enable. Internally pulled high.

Enables or disables blocking of codes with voltage blow 1.8V for CPU protection. Internally pulled high.

Analog ground return.

LSB DAC logic control. Internally pulled high.

2nd LSB DAC logic control. Internally pulled high.

3rd LSB DAC logic control. Internally pulled high.

MSB DAC logic control. Internally pulled high.

Scales VIDO output when low. Internally pulled high.

Inverting output of D4.

Analog power supply.

Copyright © 1997

Rev. 1.0 7/97

5

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