February 2005 1 MIC5821/5822
Micrel, Inc.
MIC5821/5822
MIC5821/5822
8-Bit Serial-Input Latched Drivers
Final Information
General Description
BiCMOS technology gives the MIC5821/5822 family flexibil-
ity 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 incan-
descent 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
8-BIT SERIAL-PARALLEL SHIFT REGISTER
5
SERIAL
DATA OUT
CLK
1
2
3
SERIAL
DATA IN
V
SS
9
V
DD
STROBE
OUTPUT ENABLE
(ACTIVE LOW)
Bipolar
MOS
LATCHES
OUT
8
10111213141516
OUT
7
OUT
6
OUT
5
OUT
4
OUT
3
OUT
2
OUT
1
4
6
7
Sub
GND
V
EE
8
Functional Diagram Pin Configuration
1
2
3
4
5
6
7
12
11
10
9
VDD
1
OUT
2
OUT
3
OUT
4
OUT
CLOCK
SERIAL DATA OUT
SS
V
8
13
14
15
5
OUT
6
OUT
7
OUT
8
OUT
SERIAL DATA IN
STROBE
OUTPUT ENABLE
SUB
VEE
16
LATCHES
SHIFT REGISTER
(Plastic DIP)
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Ordering Information
Part Number
Standard Pb-Free Temp Range Package
MIC5821BN MIC5821YN –40°C to +85°C16-Pin Plastic DIP
MIC5822BN MIC5822YN –40°C to +85°C16-Pin Plastic DIP
Micrel, Inc.
MIC5821/5822
MIC5821/5822 2 February 2005
Absolute Maximum Ratings (Note 1)
at 25°C Free-Air Temperature and VSS = 0V
Output Voltage, VCE (MIC5821) 50V
(MIC5822) 80V
Output Voltage, VCE SUS (MIC5821)(Note 3) 35V
(MIC5822)(Note 3) 50V
Logic Supply Voltage, VDD 15V
Input Voltage Range, VIN –0.3V to VDD + 0.3V
VDD – VEE 25V
Emitter Supply Voltage, VEE –20V
Continuous Output Current, IOUT 500mA
Package Power Dissipation, PD(Note 1) 1.67W
Operating Temperature Range, TA–55°C to +85°C
Storage Temperature Range, TS–65°C to +150°C
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.
Note 4: Specification for packaged product only.
Maximum Allowable Duty Cycle (Plastic DIP)
Number of Outputs ON
(IOUT = 200mA Maximum Allowable Duty Cycle at Ambient Temperature of
VDD = 12V) 25°C40°C50°C60°C70°C
873% 62% 55% 47% 40%
783% 71% 62% 54% 46%
697% 82% 72% 63% 53%
5100% 98% 87% 75% 63%
4100% 100% 100% 93% 79%
3100% 100% 100% 100% 100%
2100% 100% 100% 100% 100%
1100% 100% 100% 100% 100%
SUB
3k7.2k V
EE
OUT
N
Typical Output Driver
CLOCK
SERIAL
DATA I N
V
DD
V
SS
Typical Input Circuits
STROBE
OUTPUT 
ENABLE
V
DD
V
SS
February 2005 3 MIC5821/5822
Micrel, Inc.
MIC5821/5822
Electrical Characteristics (Note 4) TA = –55°C, VDD = 5V, VSS = VEE = 0V (unless otherwise noted)
Limits
Characteristic Symbol Test Conditions Min. Max. Unit
Output Leakage Current ICEX VOUT = 80V 50 µA
Collector-Emitter VCE(SAT) IOUT = 100mA 1.3 V
Saturation Voltage IOUT = 200mA 1.5
IOUT = 350mA, VDD = 7.0V 1.8
Input Voltage VIN0) 0.8 V
VIN(1) VDD = 12V 10.5
VDD = 5.0V 3.5
Input Resistance RIN VDD = 12V 35 k
VDD = 10V 35
VDD = 5.0V 35
Supply Current IDD(ON) One Driver ON, VDD = 12V 5.5 mA
One Driver ON, VDD = 10V 4.5
One Driver ON, VDD = 5.0V 3.0
All Drivers ON, VDD = 12V 16
All Drivers ON, VDD = 10V 14
All Drivers ON, VDD = 5.0V 10
IDD(OFF) All Drivers OFF, VDD = 12V 3.5
All Drivers OFF, VDD = 5.0V 2.0
Electrical Characteristics (Note 4) at TA = 25°C VDD = 5V, VEE = VSS = 0V (unless otherwise specified)
Applicable Limits
Characteristic Symbol Devices Test Conditions Min. Max. Unit
Output Leakage Current ICEX MIC5821 VOUT = 50V 50 µA
VOUT = 50V, TA = +70°C100
MIC5822 VOUT = 80V 50
VOUT = 80V, TA = +70°C100
Collector-Emitter VCE(SAT) Both IOUT = 100mA 1.1 V
Saturation Voltage IOUT = 200mA 1.3
IOUT = 350mA, VDD = 7.0V 1.6
Input Voltage VIN(0) Both 0.8 V
VIN(1) Both VDD = 12V 10.5
VDD = 10V 8.5
VDD = 5.0V 3.5
Input Resistance RIN Both VDD = 12V 50 k
VDD = 10V 50
VDD = 5.0V 50
Supply Current IDD(ON) Both One Driver ON, VDD = 12V 4.5 mA
One Driver ON, VDD = 10V 3.9
One Driver ON, VDD = 5.0V 2.4
All Drivers ON, VDD = 12V 16
All Drivers ON, VDD = 10V 14
All Drivers ON, VDD = 5.0V 8
IDD(OFF) Both All Drivers OFF, VDD = 5.0V, 1.6
All Inputs = 0V
All Drivers OFF, VDD = 12V, 2.9
All Inputs= 0V
Micrel, Inc.
MIC5821/5822
MIC5821/5822 4 February 2005
Electrical Characteristics (Note 4) TA = +125°C, VDD = 5V, VSS = VEE = 0V (unless otherwise noted)
Limits
Characteristic Symbol Test Conditions Min. Max. Unit
Output Leakage Current ICEX VOUT = 80V 500 µA
Collector-Emitter VCE(SAT) IOUT = 100mA 1.3 V
Saturation Voltage IOUT = 200mA 1.5
IOUT = 350mA, VDD = 7.0V 1.8
Input Voltage VIN(0) 0.8 V
VIN(1) VDD = 12V 10.5
VDD = 5.0V 3.5
Input Resistance RIN VDD = 12V 50 k
VDD = 10V 50
VDD = 5.0V 50
Supply Current IDD(ON) One Driver ON, VDD = 12V 4.5 mA
One Driver ON, VDD = 10V 3.9
One Driver ON, VDD = 5.0V 2.4
All Drivers ON, VDD = 12V 16
All Drivers ON, VDD = 10V 14
All Drivers ON, VDD = 5.0V 8
IDD(OFF) All Drivers OFF, VDD = 12V 2.9
All Drivers OFF, VDD = 5.0V 1.6
MIC5821/5822 Family Truth Table
Serial Shift Register Contents Serial Latch Contents Output Contents
Data Clock Data Strobe Output
Input Input I1I2I3…… I8Output Input I1I2I3…… I8Enable I1I2I3…… I8
HHR
1R2…… R7R7
LLR
1R2…… R7R7
XR
1R2R3…… R8R8
XXXX X L R
1R2R3…… R8
P1P2P3…… P8P8HP
1P2P3…… P8LP
1P2P3…… P8
XXXX H HHHH
L = Low Logic Level H = High Logic Level X = Irrelevant P = Present State R = Previous State
Timing Diagram
D
CLOCK
DATA I N
STROBE
OUTPUT
ENABLE
OUT
N
B
C
A
FE
G
February 2005 5 MIC5821/5822
Micrel, Inc.
MIC5821/5822
Timing Conditions
(TA = +25°C, Logic Levels are VDD and VSS)
VDD = 5.0V
A. Minimum Data Active Time Before Clock Pulse (Data Set-Up Time) ....................................................................... 75 ns
B. Minimum Data Active Time After Clock Pulse (Data Hold Time) ............................................................................. 75 ns
C. Minimum Data Pulse Width .................................................................................................................................... 150 ns
D. Minimum Clock Pulse Width ................................................................................................................................... 150 ns
E. Minimum Time Between Clock Activation and Strobe ............................................................................................ 300 ns
F. Minimum Strobe Pulse Width.................................................................................................................................. 100 ns
G. Typical Time Between Strobe Activation and Output Transition ............................................................................. 500 ns
SERIAL DATA present at the input is transferred to the shift register on the logic “0” to logic “1” transition of the CLOCK input
pulse. On succeeding CLOCK pulses, the registers shift data information towards the SERIAL DATA OUTPUT. The SERIAL
DATA must appear at the input prior to the rising edge of the CLOCK input waveform.
Information present at any register is transferred to its respective latch when the STROBE is high (serial-to-parallel conversion).
The latches will continue to accept new data as long as the STROBE is held high. Applications where the latches are bypassed
(STROBE tied high) will require that the ENABLE input be high during serial entry.
When the ENABLE input is high, all of the output buffers are disabled (OFF) without affecting the information stored in the
latches or shift register. With the ENABLE input low, the outputs are controlled by the state of the latches.
Typical Applications
MIC5822 Level Shifting Lamp Driver with Darlington Emitters Tied to a Negative Supply
-9V
+5V
100µ
0.1µ
SERIAL DATA CLOCK
+
1
2
3
4
5
6
7
12
11
10
9
8
13
14
15
SUB
LATCHES
16
SHIFT REGISTER
Micrel, Inc.
MIC5821/5822
MIC5821/5822 6 February 2005
Package Information
0.020
(0.508)
0.018±0.003
(0.457±0.076)
PIN 1
0.780
(19.812)
.250±0.005
(6.350±0.127)
0.025±0.015
(0.635±0.381)
0.100±0.010
(2.540±0.254)
MAX
0.030-0.110
(0.762-2.794) RAD
0.125
(3.175) MIN
0.020
(0.508) MIN
0.130±0.005
(3.302±0.127)
+0.025
–0.015
+0.635
–0.381
0.325
8.255
()
0.009-0.015
(0.229-0.381)
0°-10°
0.290-0.320
(7.336-8.128)
0.040
(1.016)TYP
16-Pin Plastic DIP (N)
February 2005 7 MIC5821/5822
Micrel, Inc.
MIC5821/5822
Micrel, Inc.
MIC5821/5822
MIC5821/5822 8 February 2005
MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
This information furnished by Micrel in this data sheet is believed to be accurate and reliable. However no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 1998 Micrel Incorporated