MIC59P50_11 Datasheet, PDF (1/5 Pages) Micrel Semiconductor – 8-Bit Parallel-Input Protected Latched Driver

MIC59P50
Micrel
MIC59P50
8-Bit Parallel-Input Protected Latched Driver
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_EE
(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 VDD is
cycled or the ENABLE/RESET pin is pulsed high. Current
pulses less than 2µs 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_DD; hysteresis of 0.5V is
provided.
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
Part Number Temperature Range
Package
MIC59P50BN
–40°C to +85°C
24-Pin Plastic DIP*
MIC59P50BV
–40°C to +85°C
28-Pin PLCC
MIC59P50BWM –40°C to +85°C
24-Pin Wide SOIC
* 300-mil “skinny DIP”
Functional Diagram
Pin Configuration
(DIP and SOIC)
STROBE
VDD
CLEAR FLAG ^ENABLE/RESET
2.2R
1.25V
R
+
–
UVLO
THERMAL
SHUTDOWN
ISHUTDOWN
–
+
IREF
IOUT / N
SQ
R
COMMON
OUTPUT
IN
R1
70k
Circuitry below dashed line is
included in each of the 8 channels.
R2
3k
VEE
FLAG 1
CLEAR ²
STROBE 3
IN 1 4
IN 2 5
IN 3 ⁶
IN 4 7
IN 5 8
IN 6 ⁹
IN 7 10
IN 8 11
VEE 12
ILIMIT _{24 VSS}
THERMAL
SHUTDOWN
23
OUTPUT
ENABLE/RESET
22 _VDD
21 OUT 1
20 OUT 2
19 OUT 3
18 OUT 4
17 OUT 5
16 OUT 6
15 OUT 7
14 OUT 8
UVLO
13 COMMON
7-58
October 1998