MICREL MIC5821BN, MIC5822BN Datasheet

MIC5821/5822

8-Bit Serial-Input Latched Drivers

MicrelMIC5821/5822

General Description

BiCMOS technology gives the MIC5821/5822 family flexibil­ity beyond the reach of standard logic buffers and power
driver arrays. These devices each have an eight-bit CMOS
shift register, CMOS control circuitry, eight CMOS data
latches, and eight bipolar current-sink Darlington output
drivers. The 500mA outputs are suitable for use with incan­descent bulbs and other moderate to high current loads. The
drivers can be operated with a split supply where the negative
supply is down to –20V. Except for maximum driver output
voltage ratings, the MIC5821 and MIC5822 are identical.

These devices have greatly improved data-input rates. 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 and 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.

Features

• 3.3 MHz Minimum Data-Input Rate

• CMOS, PMOS, NMOS, TTL Compatible

• Internal Pull-Down or Pull-Up Resistors

• Low-Power CMOS Logic and Latches

• High-Voltage Current-Sink Outputs

• Single or Split Supply Operation

Ordering Information

Part Number Temperature Range Package

MIC5821BN –40°C to +85°C 16-Pin Plastic DIP
MIC5822BN –40°C to +85°C 16-Pin Plastic DIP

Functional Diagram

CLK

1

SERIAL

2

DATA IN

V

SS

3

OUT

OUT

1

8-BIT SERIAL-PARALLEL SHIFT REGISTER

LATCHES

OUT

OUT

OUT

3

2

5

4

OUT

7

Pin Configuration

CLOCK

SERIAL

5

DATA OUT

V

DD

4

STROBE

6

OUTPUT ENABLE

7

MOS

Bipolar

Sub

10111213141516

9

OUT

OUT

6

8

7

(ACTIVE LOW)

GND

8

V

EE

SERIAL DATA IN

SERIAL DATA OUT

STROBE

OUTPUT ENABLE

1

2

V

3

SS

V

DD

4

5

6

7

8

V

EE

SUB

LATCHES

SHIFT REGISTER

(Plastic DIP)

16

OUT

1

15

OUT

2

14

OUT

3

13

OUT

4

12

OUT

5

11

OUT

6

10

OUT

7

9

OUT

8

October 1998 7-37

MicrelMIC5821/5822

Typical Input Circuits

STROBE
OUTPUT

ENABLE

Absolute Maximum Ratings (Note 1)

at 25°C Free-Air Temperature and VSS = 0V
Output Voltage, V

Output Voltage, V

V

DD

Logic Supply Voltage, V
Input Voltage Range, V
VDD – V

EE

CE

CE SUS

Emitter Supply Voltage, V
Continuous Output Current, I
Package Power Dissipation, P
Operating Temperature Range, T
Storage Temperature Range, T

V

SS

Note 1: Derate at the rate of 16.7mW/°C above TA = 25°C.
Note 2: CMOS devices have input static protection but are susceptible to

damage when exposed to extremely high static electrical
charges.

Note 3: For inductive load applications.

(MIC5821) 50V
(MIC5822) 80V
(MIC5821)(Note 3) 35V
(MIC5822)(Note 3) 50V

DD

IN

EE

OUT

D(Note 1)

–0.3V to VDD + 0.3V

A

S

–55°C to +85°C

–65°C to +150°C

15V
25V

–20V

500mA

1.67W

V

DD

CLOCK
SERIAL

DATA IN

V

SS

Maximum Allowable Duty Cycle (Plastic DIP)

Number of Outputs ON

(I

= 200mA Maximum Allowable Duty Cycle at Ambient Temperature of

OUT

VDD = 12V) 25°C40°C50°C60°C70°C

8 73% 62% 55% 47% 40%
7 83% 71% 62% 54% 46%
6 97% 82% 72% 63% 53%
5 100% 98% 87% 75% 63%
4 100% 100% 100% 93% 79%
3 100% 100% 100% 100% 100%
2 100% 100% 100% 100% 100%
1 100% 100% 100% 100% 100%

Typical Output Driver

OUT

N

3K7.2K

SUB

V

EE

7-38 October 1998