MIC5891 Datasheet, PDF (1/4 Pages) Micrel Semiconductor – 8-Bit Serial-Input Latched Source Driver

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
CLOCK
SERIAL
DATA IN
STROBE
GROUND
MOS
BIPOLAR
8-BIT SERIAL PARALLEL SHIFT REGISTER
LATCHES
OUT₁ OUT₂ OUT₃ OUT₄ OUT₅ OUT₆ OUT₇ OUT₈
Pin Configurations
SERIAL
DATA OUT
OUTPUT
ENABLE
GROUND 1
CLOCK 2
SERIAL
DATA IN
3
STROBE 4
OUT₁ 5
OUT₂ 6
OUT₃ 7
OUT₄ 8
16 ^SERIAL
DATA OUT
SHIFT _VDD 15 LOGIC SUPPLY
REGISTER
OE
14
OUTPUT
ENABLE
LATCHES V_BB 13 LOAD SUPPLY
12 OUT₈
11 OUT₇
10 OUT₆
9 OUT₅
7-54
December 1997