MIC59P50 Micrel Semiconductor, MIC59P50 Datasheet

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MIC59P50

Manufacturer Part Number
MIC59P50
Description
8-Bit Parallel-Input Protected Latched Driver
Manufacturer
Micrel Semiconductor
Datasheet

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MIC59P50
General Description
The MIC59P50 parallel-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 CLEAR, STROBE, and OUTPUT ENABLE func-
tions. Similar to the MIC5801, additional protection circuitry
supplied on this device includes thermal shutdown, under
voltage lockout (UVLO), and over-current shutdown.
The bipolar/MOS combination provides an extremely low-
power latch with maximum interface flexibility. The MIC59P50
has open-collector outputs capable of sinking 500mA and
integral diodes for inductive load transient suppression with
a minimum output breakdown voltage rating of 80V above V
(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 MIC59P50 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.
Each of these eight outputs has an independent over-current
shutdown at 500 mA. Upon current shutdown, the affected
channel will turn OFF and the flag will go low until V
cycled or the ENABLE/RESET pin is pulsed high. Current
pulses less than 2 s will not activate over-current shutdown.
Temperatures above 165 C will shut down the device and
activate the open collector FLAG output at pin 1. The UVLO
circuit disables the outputs at low V
provided.
Functional Diagram
IN
STROBE
V DD
1.25V
2.2R
R
+
UVLO
CLEAR
SHUTDOWN
THERMAL
FLAG
DD
ENABLE/RESET
; hysteresis of 0.5V is
Circuitry below dashed line is
included in each of the 8 channels.
S
R
I SHUTDOWN
Q
DD
70k
+
R1
V EE
EE
COMMON
is
7-58
I REF
I OUT / N
R2
3k
OUTPUT
Features
• 4.4 MHz Minimum Data Input Rate
• High-Voltage, High-Current Outputs
• Per-Output Over-Current Shutdown (500mA Typical)
• Undervoltage Lockout
• Thermal Shutdown
• Output Fault Flag
• Output Transient Protection Diodes
• CMOS, PMOS, NMOS, and TTL Compatible Inputs
• Internal Pull-Down Resistors
• Low-Power CMOS Latches
• Single or Split Supply Operation
Ordering Information
* 300-mil “skinny DIP”
8-Bit Parallel-Input Protected Latched Driver
Part Number
MIC59P50BN
MIC59P50BV
MIC59P50BWM
Pin Configuration
(DIP and SOIC)
STROBE
CLEAR
FLAG
Temperature Range
V EE
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
–40 C to +85 C
–40 C to +85 C
–40 C to +85 C
MIC59P50
10
11
12
1
2
3
4
5
6
7
8
9
UVLO
SHUTDOWN
THERMAL
I LIMIT
24
23
22
21
20
19
18
17
16
15
14
13
V SS
OUTPUT
ENABLE/RESET
V DD
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
COMMON
24-Pin Plastic DIP*
28-Pin PLCC
24-Pin Wide SOIC
Package
October 1998
Micrel

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MIC59P50 Summary of contents

Page 1

... With a 5V logic supply, the MIC59P50 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 ...

Page 2

... Logic reference (Ground) pin. 7- OUT OUT OUT MIC59P50BV OUT OUT OUT OUT MIC59P50BN NUMBER OF OUTPUTS CONDUCTING SIMULTANEOUSLY PERCENT DUTY CYCLE Micrel 7 100 ...

Page 3

... MIC59P50 Electrical Characteristics +25 C; unless noted Characteristic Symbol Output Leakage Current I CEX Collector-Emitter V CE(SAT) Saturation Voltage Input Voltage V IN(0) V IN(1) Input Resistance R IN Flag Output Current I OL Flag Output Leakage I OH Supply Current I DD(ON) (One output active) I DD(ON) (All outputs active) I DD(OFF) ...

Page 4

... MIC59P50 CLEAR STROBE OUTPUT ENABLE OUT N Timing Conditions (T = +25 C, Logic Levels are V and Minimum data active time before strobe enabled (data set-up time) ...................................................................... Minimum data active time after strobe disabled (data hold time) ............................................................................ Minimum strobe pulse width .................................................................................................................................. 125 ns D ...

Page 5

... MIC59P50 Typical Applications FLAG OUTPUT STROBE INPUT 1 INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 INPUT 7 INPUT 8 MIC59P50 Protected Relay Driver 10k +5V +5V I LIMIT 1 24 THERMAL SHUTDOWN UVLO 7-62 +24V 0.1µF 22µ ...

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