Micrel

MIC5841/5842

7-42

October 1998

MIC5841/5842

8-Bit Serial-Input Latched Drivers

Features

• 3.3 MHz Minimum Data-Input Rate

• CMOS, PMOS, NMOS, TTL Compatible

• Internal Pull-Up/Pull-Down Resistors

• Low-Power CMOS Logic and Latches

• High-Voltage Current-Sink Outputs

• Output Transient-Protection Diodes

• Single or Split Supply Operation

Functional Diagram

Pin Configuration

(DIP, SOIC)

DD

1

2

3

4

5

6

7

14

13

12

11

10

V

1

OUT

2

OUT

3

OUT

4

OUT

CLOCK

SERIAL DATA OUT

SS

V

8

9

15

16

17

18

5

OUT

6

OUT

7

OUT

8

OUT

K

EE

V

SERIAL DATA IN

STROBE

OUTPUT ENABLE

EE

V

C

DD

V

SS

V

SUB

SUB

ST

OE

8-BIT SERIAL-PARALLEL SHIFT REGISTER

6

SERIAL

DATA OUT

CLK

1

3

4

SERIAL

DATA IN

11

STROBE

OUTPUT ENABLE

(ACTIVE LOW)

Bipolar

MOS

LATCHES

12

13

14

15

16

17

18

5

7

8

Sub

9

1

10

K

General Description

Using BiCMOS technology, the MIC5841/5842 integrated

circuits were fabricated to be used in a wide variety of

peripheral power driver applications. The devices each have

an eight-bit CMOS shift register, CMOS control circuitry,

eight CMOS data latches, and eight bipolar current-sink

Darlington output drivers.

These two devices differ only in maximum voltage ratings.

The MIC5842 offers premium performance with a minimum

output breakdown voltage rating of 80V (50V sustaining). The

drivers can be operated with a split supply where the negative

supply is down to –20V.

The 500 mA outputs, with integral transient-suppression

diodes, are suitable for use with lamps, relays, solenoids and

other inductive loads.

These devices have improved speed characteristics. With a

5V logic supply, they will typically operate faster than 5 MHz.

With a 12V supply, significantly higher speeds are obtained.

The CMOS inputs are compatible with standard CMOS,

PMOS, and NMOS logic levels. TTL or DTL circuits may

require the use of appropriate pull-up resistors. By using the

serial data output, the drivers can be cascaded for interface

applications requiring additional drive lines.

The MIC5840 family is available in DIP, PLCC, and SOIC

packages. Because of limitations on package power dissipa-

tion, the simultaneous operation of all drivers at maximum

rated current might require a reduction in duty cycle. A

copper-alloy lead frame provides for maximum package

power dissipation.

Ordering Information

Part Number

Temperature Range

Package

MIC5841BN

–40

°C to +85°C

18-Pin Plastic DIP

MIC5841BV

–40

°C to +85°C

20-Pin PLCC

MIC5841BWM

–40

°C to +85°C

18-Pin Wide SOIC

MIC5842BN

–40

°C to +85°C

18-Pin Plastic DIP

MIC5842BV

–40

°C to +85°C

20-Pin PLCC

MIC5842BWM

–40

°C to +85°C

18-Pin Wide SOIC