NTE1531 datasheet(2/3 Pages) NTE

Part #	NTE1531

Description	Integrated Circuit Voltage Regulator for Electronic Tuning System

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Manufacturer	NTE [NTE Electronics]

Direct Link	http://www.nteinc.com

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Operational Characteristics (Cont’d): (TA = +25°C, unless otherwise specified)

Parameter

Symbol

Conditions

Min

Typ

Max

Unit

VDD Voltage

VDD(5)

VCLK = +B2 = 16V, IDD = 18mA, Iref

= 10mA, Vref = 8V,

TA = –20° to +70°C, +B1 opened.

Vref–0.3

–

10

V

Radio Back–Up

Signal Voltage

VBUC

+B1 = +B2 = 9.15 to 16V, Vref = 8V 0.78VDD

–

VDD

V

Clock Back–Up

Signal Voltage

VINHI

+B1 = +B2 = 9.15 to 16V, Vref = 8V 0.78VDD

–

VDD

V

Radio Back–Up Signal

Rise Voltage

VTH BUC UP +B1 = +B2, Vref = 8V, Iref = 10mA

8.9

–

9.3

V

Radio Back–Up Signal

Hysteresis

VTH BUC DN +B1 = +B2, Vref = 8V, Iref = 10mA

50

–

200

mV

BUC Delay Time

at +B Step Input

tD

+B1 = +B2 = 13.2V,

C = 22

µF, R = 22k ohm

85

–

400

ms

Current Dissipation

ICC(1)

+B1 = +B2 = 13.2V,

IDD = 30mA, Iref = 10mA

–

70

–

mA

ICC(2)

+B2 = 13.2V, no load, +B1 opened.

–

0.63

1.4

mA

Vref Thermal Drift

|∆Vref|

TA = –10 to +60°C,

Vref = 8V (25°C)

–60

0

60

mV

Logic Table:

B1

B2

CLK

VDD

Vref

BUC

INHI

Condition

L

H

L

5V

0V

L

When back–up of time

H

L

9V

8V

H

radio on

L

H

9V

8V

L

H

read out time when radio off

H

9V

8V

H

read out time when radio on

NOTE: This device is for REPLACEMENT ONLY! No application notes are available.

Block Diagram

Control LSI

Control Signal

Generator

Counter IC

Control Signal

Generator

Logic

Circuit

Comparator

VDD Generator

for Back–Up

Time

Delay

VDD

Generator

Vref

Generator

Reference

Voltage

Generator

Comparator

14

13

12

14

2

3

10

N.C.

Vref

VDD

C2

V1

Det

C3

C1

GND

B2

CLK

B1

INHI

BUC

98

511

6

7

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