MICREL MIC5891BWM, MIC5891BN Datasheet

MIC5891 Micrel

MIC5891

8-Bit Serial-Input Latched Source Driver

General Description

The MIC5891 latched driver is a high-voltage, high current
integrated circuit comprised of eight CMOS data latches,
CMOS control circuitry for the common STROBE and OUTPUT
ENABLE, and bipolar Darlington transistor drivers for each
latch.

Bipolar/MOS construction provides extremely low power
latches with maximum interface flexibility.

The MIC5891 will typically operate at 5MHz with a 5V logic
supply.

The CMOS inputs are compatible with standard CMOS,
PMOS, and NMOS logic levels. TTL circuits may be used with
appropriate pull-up resistors to ensure a proper logic-high
input.

A CMOS serial data output allows additional drivers to be
cascaded when more than 8 bits are required.

The MIC5891 has open-emitter outputs with suppression
diodes for protection against inductive load transients. The
output transistors are capable of sourcing 500mA and will
sustain at least 35V in the on-state.

Simultaneous operation of all drivers at maximum rated
current requires a reduction in duty cycle due to package
power limitations. Outputs may be paralleled for higher load
current capability.

The MIC5891 is available in a 16-pin plastic DIP package (N)
and 16-pin wide SOIC package (WM).

Features

• High-voltage, high-current outputs

• Output transient protection diodes

• CMOS-, PMOS-, NMOS-, and TTL-compatible inputs

• 5MHz typical data input rate

• Low-power CMOS latches

Applications

• Alphanumeric and bar graph displays

• LED and incandescent displays

• Relay and solenoid drivers

• Other high-power loads

Ordering Information

Part Number Temperature Range Package

MIC5891BN –40°C to +85°C 16-Pin Plastic DIP
MIC5891BWM –40°C to +85°C 16-pin Wide SOIC

Functional Diagram Pin Configurations

CLOCK

SERIAL
DATA IN

STROBE

GROUND

MOS

BIPOLAR

8-BIT SERIAL PARALLEL SHIFT REGISTER

LATCHES

OUT1OUT2OUT3OUT4OUT5OUT6OUT7OUT

SERIAL

DATA OUT

OUTPUT
ENABLE

8

GROUND

CLOCK
SERIAL

DATA IN

STROBE 4

7-54 December 1997

OUT

1

OUT

2

OUT37

OUT

4

1

2
3

5

6

8

SHIFT

REGISTER

LATCHES

16

15

V

DD

14

OE

V

BB

12

11
10

9

SERIAL
DATA OUT

LOGIC SUPPLY
OUTPUT

ENABLE
LOAD SUPPLY13

OUT

8

OUT

7

OUT

6

OUT

5

MIC5891 Micrel

Typical Circuits

IN

Typical Input Circuit

V

DD

Output Voltage (V

) .............................................. 50V

OUT

Logic Supply Voltage Range (VDD)............... 4.5V to 15V

Load Supply Voltage Range (VBB)................ 5.0V to 50V

Input Voltage Range (VIN)................. –0.3V to VDD+0.3V

Continuous Collector Current (IC) ........................ 500mA

Package Power Dissipation .............................

see graph

Operating Temperature Range (TA)......–55°C to +125°C

Storage Temperature Range (TS).........–65°C to +150°C

Note 1: TA = 25°C
Note 2: Derate at the rate of 20mW/°C above TA = 25°C.
Note 3: Micrel CMOS devices have input-static protection but are

V

BB

susceptible to damage when exposed to extremely high static
electrical charges.

Allowable Duty Cycles

Absolute Maximum Ratings (Notes 1, 2, 3)

Typical Output Circuit

Allowable Package Power

Dissipation vs. Temp.

2.5

2

PDIP

= 60°C/W

1.5

1

θ

JA

V

OUT

Number of

Outputs ON at

I

= –200 mA

OUT

Max. Allowable Duty Cycles

at TA of:

50°C60°C70°C

8 53% 47% 41%
7 60% 54% 48%
6 70% 64% 56%
5 83% 75% 67%
4 100% 94% 84%
3 100% 100% 100%
2 100% 100% 100%
1 100% 100% 100%

7

0.5

CerDIP
= 90°C/W

θ

JA

0

25 50 75 100 125 150

PACKAGE POWER DISSIPATION (W)

AMBIENT TEMPERATURE (°C)

December 1997 7-55