HEF4794BT datasheet(4/16 Pages) PHILIPS

Part #	HEF4794BT

Description	8-stage shift-and-store register LED driver

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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4 / 16 page

1999 Jun 30

4

Philips Semiconductors

Product speciﬁcation

8-stage shift-and-store register LED driver

HEF4794B

FUNCTIONAL DESCRIPTION

Table 1

Function table; note 1

Note

1. H = HIGH state;

L = LOW state;

X = don’t care;

↑ = positive-going transition;

↓ = negative-going transition;

Z = high-impedance OFF state;

nc = no change;

O6' = the information in the seventh shift register

stage.

a) At the positive clock edge the information in the

7th register stage is transferred to the 8th register

stage and the OS output.

INPUTS

PARALLEL

OUTPUTS

SERIAL

OUTPUTS

CP

EO

STR

D

O0

On

OS

OS'

↑

LX

X

Z

O6'nc

↓

LX

X

Z

nc

O7

↑

HL

X

nc

O6'nc

↑

HH

L

On − 1

O6'nc

↑

HHH

H

On − 1

O6'nc

↓

H

nc

O7

FAMILY DATA

See

“Family Specifications” except for: rating for DC

current into any open-drain output is 40 mA.

IDD LIMITS CATEGORY MSI

See

“Family Specifications” for ratings.

DC CHARACTERISTICS

VSS =0V.

SYMBOL

PARAMETER

CONDITIONS

Tamb (°C)

UNIT

−40

+25

+85

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

VOL

LOW level output

voltage

VI =VSS or VDD;

IO < 20 mA; VDD =5V

−

0.75

−

0.75

−

1.5

V

VI =VSS or VDD;

IO < 20 mA;

VDD =10V

−

0.75

−

0.75

−

1.5

V

VI =VSS or VDD;

IO < 20 mA;

VDD =15V

−

0.75

−

0.75

−

1.5

V

IOZH

HIGH level output

leakage current;

3-state

VO =15V; VDD =5V

−

2

−

2

−

15

µA

VO =15V; VDD =10V

−

2

−

2

−

15

µA

VO =15V; VDD =15V

−

2

−

2

−

15

µA

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HEF4794BT Datasheet(PDF) 4 Page - NXP Semiconductors

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