MIC5891 Micrel Semiconductor, MIC5891 Datasheet

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MIC5891

Manufacturer Part Number
MIC5891
Description
8-Bit Serial-Input Latched Source Driver
Manufacturer
Micrel Semiconductor
Datasheet

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MIC5891
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).
Functional Diagram
GROUND
STROBE
DATA IN
SERIAL
CLOCK
BIPOLAR
MOS
OUT
1
8-BIT SERIAL PARALLEL SHIFT REGISTER
OUT
2
OUT
3
OUT
LATCHES
4
OUT
5
OUT
6
OUT
7
OUT
8
7-54
Features
Applications
Ordering Information
Pin Configurations
DATA OUT
OUTPUT
ENABLE
Part Number
MIC5891BN
MIC5891BWM
SERIAL
8-Bit Serial-Input Latched Source Driver
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
Alphanumeric and bar graph displays
LED and incandescent displays
Relay and solenoid drivers
Other high-power loads
GROUND
STROBE
DATA IN
SERIAL
CLOCK
OUT
OUT
OUT
OUT
1
2
3
4
Temperature Range
–40 C to +85 C
–40 C to +85 C
1
2
3
4
5
6
7
8
MIC5891
REGISTER
LATCHES
SHIFT
V
V
OE
DD
BB
16
15
14
13
12
11
10
9
SERIAL
DATA OUT
LOGIC SUPPLY
OUTPUT
ENABLE
LOAD SUPPLY
OUT
OUT
OUT
OUT
16-Pin Plastic DIP
16-pin Wide SOIC
8
7
6
5
December 1997
Package
Micrel

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MIC5891 Summary of contents

Page 1

... 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). Functional Diagram CLOCK SERIAL ...

Page 2

... MIC5891 Typical Circuits IN Typical Input Circuit Typical Output Circuit Allowable Package Power Dissipation vs. Temp. 2.5 2 PDIP = 60°C/W 1 0.5 CerDIP = 90°C 100 AMBIENT TEMPERATURE (°C) December 1997 Absolute Maximum Ratings V DD Output Voltage (V Logic Supply Voltage Range (V Load Supply Voltage Range (V ...

Page 3

... MIC5891 Electrical Characteristics V = 50V 12V +25 C; unless noted Characteristic Output Leakage Current Output Saturation Voltage Output Sustaining Voltage Input Voltage Input Current Input Impedance Maximum Clock Frequency Serial Data Output Resistance Turn-On Delay Turnoff Delay Supply Current Diode Leakage Current Diode Forward Voltage Note 4: Positive (negative) current is defined as going into (coming out of) the specified device pin ...

Page 4

... MIC5891 CLOCK DATA IN STROBE OUTPUT ENABLE OUT N Truth Table Serial Shift Register Contents Data Clock Input Input … … … … … … Low Logic Level ...

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