MIC58P42 Datasheet, PDF (1/5 Pages) Micrel Semiconductor – 8-Bit Serial-Input Protected Latched Driver

MIC58P42
Micrel
MIC58P42
8-Bit Serial-Input Protected Latched Driver
General Description
Features
The MIC58P42 serial-input latched driver is a high-voltage
(80V), high-current (500mA) integrated circuit comprised of
eight CMOS data latches, a bipolar Darlington transistor
driver for each latch, and CMOS control circuitry for the
common STROBE, CLOCK, SERIAL DATA INPUT, and
OUTPUT ENABLE functions. Similar to the MIC5842, addi-
tional protection circuitry supplied on this device includes
thermal shutdown, under voltage lockout (UVLO), and over-
current shutdown.
The bipolar/CMOS combination provides an extremely low-
power latch with maximum interface flexibility. The MIC58P42
has open-collector outputs capable of sinking 500 mA and
integral diodes for inductive load transient suppression 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 and may be
paralleled for higher load current capability.
With a 5V logic supply, the MIC58P42 will typically operate at
better than 5MHz. With a 12V logic supply, significantly
higher speeds are obtained. The CMOS inputs are compat-
ible with standard CMOS, PMOS, and NMOS circuits. TTL
circuits may require pull-up resistors. By using the serial data
output, drivers may be cascaded for interface applications
requiring additional drive lines.
• 3.3 MHz Minimum Data-Input Rate
• CMOS, PMOS, NMOS, and TTL Compatible
• Internal Pull-Up/Pull-Down Resistors
• Low Power CMOS Logic and Latches
• High Voltage (80V) Current-Sink Outputs
• Output Transient-Protection Diodes
• Single or Split Supply Operation
• Thermal Shutdown
• Under-Voltage Lockout
• Per-Output Over-Current Shutdown (500mA typical)
Ordering Information
Part Number Temperature Range Package
MIC58P42BN
–40°C to +85°C
18-Pin Plastic DIP
MIC58P42BV
–40°C to +85°C
20-Pin PLCC
MIC58P42BWM –40°C to +85°C
18-Pin Wide SOIC
Each of these eight outputs has an independent over current
shutdown of 500 mA. Upon over-current detection, the
7
affected channel
ENABLE/RESET
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2µs will not activate current shutdown. Temperatures above
165°C will shut down the device. The UVLO circuit prevents
operation at low V_DD; hysteresis of 0.5V is provided. See the
MIC59P60 for a similar device that additionally provides an
error flag output.
Functional Diagram
Pin Configuration
(DIP and SOIC)
CLOCK 2
SERIAL
DATA IN
3
VSS 4
UVLO
8-BIT SERIAL–PARALLEL SHIFT REGISTER
LATCHES
MOS
BIPOLAR
6 SERIAL DATA OUT
5 VDD
7 STROBE
8 OUTPUT
ENABLE/RESET
THERMAL
SHUTDOWN
ILIMIT
10
18
17
16
15
14
13
12
11
SUB ₁
9
K OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8
VEE
VEE
CLOCK
1
SUB
2
SERIAL DATA IN 3
VSS ₄
VDD ₅
SERIAL DATA OUT 6
STROBE 7
OUTPUT
ENABLE/RESET
8
VEE ₉
SUB
UVLO
18 OUT1
17 OUT2
16 OUT3
15 ^OUT4
14 OUT5
13 OUT6
12 OUT7
11 OUT8
10 K
I LIMIT
THERMAL
SHUTDOWN
October 1998
7-49