MIC5841/5842
8-Bit Serial-Input Latched Drivers
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2006
M9999-050506
(408) 955-1690
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 500mA 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
dissipation, 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.
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
Ordering Information
Part Number
Standard Pb-Free
Temperature Range Package
MIC5841BN MIC5841YN –40ºC to +85ºC 18-Pin Plastic DIP
MIC5841BV MIC5841YV –40ºC to +85ºC 20-Pin PLCC
MIC5841BWM MIC5841YWM –40ºC to +85ºC 18-Pin Wide SOIC
MIC5842BN MIC5842YN –40ºC to +85ºC 18-Pin Plastic DIP
MIC5842BV MIC5842YV –40ºC to +85ºC 20-Pin PLCC
MIC5842BWM MIC5842YWM –40ºC to +85ºC 18-Pin Wide SOIC
Micrel, Inc. MIC5841/42
May 2006
2 M9999-050506
(408) 955-1690
Functional Diagram
8-BIT SERIAL-PARALLEL SHIFT REGISTER
6
SERIAL
DATA OUT
CLK
1
3
4
SERIAL
DATA IN
V
SS
11
V
DD
STROBE
OUTPUT ENABL
E
(ACTIVE LOW)
Bipolar
MOS
LATCHES
OUT
8
12131415161718
OUT
7
OUT
6
OUT
5
OUT
4
OUT
3
OUT
2
OUT
1
5
7
8
Sub
V
EE
9
1
10
K
Micrel, Inc. MIC5841/42
May 2006
3 M9999-050506
(408) 955-1690
Absolute Maximum Ratings(1,2,3)
At 25°C Free-Air Temperature and V
SS
................... 0V
Output Voltage, V
CE
(MIC5841) ............................. 50V
(MIC5842) .............................. 80V
Output Voltage, V
CE(SUS)
(MIC5841)
(1)..................................
35V
(MIC5842) ........................ 50V
Logic Supply Voltage, V
DD
....................................... 15V
VDD with Reference to V
EE
..................................... 25V
Emitter Supply Voltage, V
EE
...................................–20V
Input Voltage Range, V
IN
............... –0.3V to V
DD
+ 0.3V
Continuous Output Current, I
OUT
.........................500mA
Package Power Dissipation, P
D(2)
........................1.82W
Operating Temperature Range, T
A
.......–55°C to +85°C
Storage Temperature Range, T
S
........–65°C to +150°C
Electrical Characteristics
At T
A
= 25°C V
DD
= 5V, V
SS
= V
EE
= 0V (unless otherwise noted)
Limits
Characteristic Symbol Applicable Devices Test Conditions Min Max Unit
V
OUT
= 50V 50 MIC5841
V
OUT
= 50V, T
A
= +70ºC 100
V
OUT
= 80V 50
Output Leakage Current I
CEX
MIC5842
V
OUT
= 80V, T
A
= +70ºC 100
µA
I
OUT
= 100mA 1.1
I
OUT
= 200mA 1.3
Collector-Emitter Saturation Voltage V
CE(SAT)
Both
I
OUT
= 350mA, V
DD
= 7.0V 1.6
V
MIC5841 I
OUT
= 350mA, L = 2mH 35 Collector-Emitter Saturation Voltage V
CE(SUS)(5)
MIC5842 I
OUT
= 350mA, L = 2mH 50
V
V
IN(0)
Both 0.8
V
DD
= 12V 10.5
V
DD
= 10V 8.5
Input Voltage
V
IN(1)
Both
V
DD
= 5.0V(4) 3.5
V
V
DD
= 12V 50
V
DD
= 10V 50
Input Resistance R
IN
Both
V
DD
= 5.0V 50
kΩ
All Drivers ON, V
DD
= 12V 16
All Drivers ON, V
DD
= 10V 14
IDD
(ON)
Both
All Drivers ON, V
DD
= 5.0V 8.0
All Drivers OFF, V
DD
= 12V 2.9
All Drivers OFF, V
DD
= 10V 2.5
Supply Current
IDD
(OFF)
Both
All Drivers OFF, V
DD
= 5.0V 1.6
1.6
MIC5841 V
R
= 50V 50 Clamp Diode Leakage Current I
R
MIC5842 V
R
= 80V 50
µA
Clamp Diode Forward Voltage V
F
Both I
F
= 350mA 2.0 V
Micrel, Inc. MIC5841/42
May 2006
4 M9999-050506
(408) 955-1690
Electrical Characteristics
At T
A
= –55°C V
DD
= 5V, V
SS
= V
EE
= 0V (unless otherwise noted)
Limits
Characteristic Symbol Test Conditions Min Max Unit
Output Leakage Current I
CEX
V
OUT
= 80V 50 µA
I
OUT
= 100mA 1.3
I
OUT
= 200mA 1.5
Collector-Emitter Saturation Voltage V
CE(SAT)
I
OUT
= 350mA, V
DD
= 7.0V 1.8
V
V
IN(0)
0.8
V
DD
= 12V 10.5
Input Voltage
V
IN(1)
V
DD
= 5.0V 3.5
V
V
DD
= 12V 35
V
DD
= 10V 35
Input Resistance R
IN
V
DD
= 5.0V 35
kΩ
All Drivers ON, V
DD
= 12V 16
All Drivers ON, V
DD
= 10V 14
I
DD(ON)
All Drivers ON, V
DD
= 5.0V 10
All Drivers OFF, V
DD
= 12V 3.5
Supply Current
I
DD(OFF)
All Drivers OFF, V
DD
= 5.0V 2.0
mA
Electrical Characteristics
At T
A
= +125°C V
DD
= 5V, V
SS
= V
EE
= 0V (unless otherwise noted)
Limits
Characteristic Symbol Test Conditions Min Max Unit
Output Leakage Current I
CEX
V
OUT
= 80V 500 µA
I
OUT
= 100mA 1.3
I
OUT
= 200mA 1.5
Collector-Emitter Saturation Voltage V
CE(SAT)
I
OUT
= 350mA, V
DD
= 7.0V 1.8
V
V
IN(0)
0.8
V
DD
= 12V 10.5
Input Voltage
V
IN(1)
V
DD
= 5.0V 3.5
V
V
DD
= 12V 50
V
DD
= 10V 50
Input Resistance R
IN
V
DD
= 5.0V 50
kΩ
All Drivers ON, V
DD
= 12V 16
All Drivers ON, V
DD
= 10V 14
I
DD(ON)
All Drivers ON, V
DD
= 5.0V 8
All Drivers OFF, V
DD
= 12V 2.9
Supply Current
I
DD(OFF)
All Drivers OFF, V
DD
= 5.0V 2.1.6
mA
MIC5841A V
R
= 50V 1.6 µA Clamp Diode Leakage Current I
R
MIC5842A V
R
= 80V 100
Notes:
1. For Inductive load applications.
2. Derate at the rate of 18.2mW/°C above TA = 25°C (Plastic DIP)
3. CMOS devices have input-static protection but are susceptible to damage when exposed to extremely high static electrical charges.
4. Operation of these devices with standard TTL may require the use of appropriate pull-up resistors to insure an input logic HIGH.
5. Not 100% tested. Guaranteed by design.
Micrel, Inc. MIC5841/42
May 2006
5 M9999-050506
(408) 955-1690
Timing Conditions
(TA = 25°C Logic Levels are V
DD
and V
SS
) V
DD
= 5V
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 data entry.
When the ENABLE input is high, all of the output buffers are disabled (OFF) without affecting information stored in the
latches or shift register. With the ENABLE input low, the outputs are controlled by the state of the latches.
MIC5840 Family Truth Table
Shift Register Contents Latch Contents Output Contents
Serial
Data
Input
Clock
Input I
1
I
2
I
3
… I
8
Serial
Data
Output
Strobe
Input I
1
I
2
I
3
… I
8
Output
Enable I
1
I
2
I
3
…I
8
H H R1 R2 … R7 R7
L L R1 R2 … R7 R7
X R1 R2 R3 … R8 R8
X X X … X X L R1 R2 R3 … R8
P1 P2 P3 … P8 P8 H P1 P2 P3 … P8 L P1 P2 P3 … P8
X X X … X H H H H … H
L = Low Logic Level
H = High Logic Level
X = Irrelevant
P = Present State
R = Previous State
Micrel, Inc. MIC5841/42
May 2006
6 M9999-050506
(408) 955-1690
Typical Output Driver
Typical Input Circuits
Maximum Allowable Duty Cycle (Plastic DIP)
V
DD
= 5.0V
Max. Allowable Duty Cycle at Ambient Temp eratu re of
Number of Outputs ON
(I
OUT
= 200mA
V
DD
= 5.0V) 25ºC 40ºC 50ºC 60ºC 70ºC
8 85% 72% 64% 55% 46%
7 97% 82% 73% 63% 53%
6 100% 96% 85% 73% 62%
5 100% 100% 100% 88% 75%
4 100% 100% 100% 100% 93%
3 100% 100% 100% 100% 100%
2 100% 100% 100% 100% 100%
1 100% 100% 100% 100% 100%
V
DD
= 12V
Max. Allowable Duty Cycle at Ambient Temp eratu re of
Number of Outputs ON
(I
OUT
= 200mA
V
DD
= 12V) 25ºC 40ºC 50ºC 60ºC 70ºC
8 80% 68% 60% 52% 44%
7 91% 77% 68% 59% 50%
6 100% 90% 79% 69% 58%
5 100% 100% 95% 82% 69%
4 100% 100% 100% 100% 86%
3 100% 100% 100% 100% 100%
2 100% 100% 100% 100% 100%
1 100% 100% 100% 100% 100%
Micrel, Inc. MIC5841/42
May 2006
7 M9999-050506
(408) 955-1690
Typical Applications
Relay/Solenoid Driver MIC5842 MIC5841 Hammer Driver
MIC5841 Solenoid Driver with Output Enable MIC5841 Level Shifting Lamp Driver with
Darlington Emitters Tied to a Negative Supply
Micrel, Inc. MIC5841/42
May 2006
8 M9999-050506
(408) 955-1690
Typical Applications, Continued
1
2
3
4
5
6
7
14
13
12
11
10
LATCHES
8
9
15
16
17
18
SHIFT REGISTER
C
DD
V
SS
V
SUB
SUB
ST
OE
10k
RFC
1000p
15
+75V
Transmitter
10k
RFC1000p
25
+75V
10k
RFC
1000p
25
+75V
RFC
Antenna
Receiver
Diode
D1 D2 D3
(Latch 1) (Latch 5) (Latch 8)
Receive OFF ACTIVE OFF
Transmit ACTIVE OFF ACTIVE
+75V
PIN Diodes: UM9651
CLOCK
STROBE
DATA IN
–5V
+5V
0.01µ
0.01µ
0.01µ
+
100µ
D1
D2
D3
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
The 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.
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© 1998 Micrel, Incorporated.