October 1998

7-49

MIC58P42

Micrel

VEE

OUTPUT

ENABLE/RESET

STROBE

SERIAL DATA OUT

VDD

VSS

SERIAL DATA IN

CLOCK

VEE

OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

SHIFT REGISTER

LATCHES

SUB

UVLO

THERMAL

SHUTDOWN

I LIMIT

SUB

General Description

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.

Each of these eight outputs has an independent over current
shutdown of 500 mA. Upon over-current detection, the
affected channel will turn OFF until V

is cycled or the

ENABLE/RESET pin is pulsed high. Current pulses less than
2

s will not activate current shutdown. Temperatures above

165

C will shut down the device. The UVLO circuit prevents

operation at low V

; hysteresis of 0.5V is provided. See the

MIC59P60 for a similar device that additionally provides an
error flag output.

Features

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

C to +85

18-Pin Plastic DIP

MIC58P42BV

C to +85

20-Pin PLCC

MIC58P42BWM

C to +85

18-Pin Wide SOIC

Pin Configuration

(DIP and SOIC)

Functional Diagram

CLOCK

SERIAL

DATA IN

VSS

UVLO

THERMAL

SHUTDOWN

ILIMIT

OUT8

OUT7

OUT6

OUT5

OUT4

OUT3

OUT2

OUT1

SUB

VEE

MOS

BIPOLAR

SERIAL DATA OUT

VDD

STROBE

OUTPUT
ENABLE/RESET

8-BIT SERIALPARALLEL SHIFT REGISTER

LATCHES

MIC58P42

8-Bit Serial-Input Protected Latched Driver

7-50

October 1998

MIC58P42

Micrel

Absolute Maximum Ratings (Note 1, 2)

at 25

C Free-Air Temperature and V

= 0V

Output Voltage

80V

Output Voltage, V

CE(SUS)

(Note 1)

50V

Logic Supply Voltage Range, V

4.5V to 15V

with Reference to V

25V

Emitter Supply Voltage (Substrate), V

20V

Input Voltage Range, V

0.3V to V

+ 0.3V

Package Power Dissipation, P

MIC58P42BN

1.82W

Derate above T

= +25

18mW/

MIC58P42BV

1.4W

Derate above T

= +25

14mW/

MIC58P42BWM

1.2W

Derate above T

= +25

12mW/

Operating Temperature Range, T

C to +125

Storage Temperature Range, T

C to +150

Note 1: For Inductive load applications.

Note 2: CMOS devices have input-static protection but are susceptible to

damage when exposed to extremely high static electrical
charges.

STROBE
OUTPUT

ENABLE

CLOCK

SERIAL

DATA IN

Typical Input Circuits

PLCC Pin Configuration

OUT 1

OUT 2

OUT 3

OUT 4

OUT 5

OUT 6

OUT 7

OUT 8

SERIAL DATA OUT

VSS

SERIAL DATA IN

STROBE

OE/RESET

VDD

MIC58P42BV

CLOCK

SUB

OUT

Typical Output Driver

Pin

Name

Description

(DIP & S.O.)

1,9

Substrate. Most Negative voltage in the system connects here.

CLOCK

Serial Data Clock. A CLEAR input must also be clocked into the latches.

SERIAL DATA IN

Serial Data Input pin.

Logic reference (Ground) pin.

Logic Positive Supply voltage.

SERIAL DATA OUT

Serial Data Output pin. (Flowthrough).

STROBE

Output Strobe pin. Loads output latches when high. Strobe is needed to clear latch.

OUTPUT

When Low, Outputs are active. When High, device is reset from a fault condition.

ENABLE/RESET

Transient suppression diode's cathode common pin.

11--18

OUTPUT N

Open Collector outputs 8 through 1.

Pin Description

October 1998

7-51

MIC58P42

Micrel

Electrical Characteristics

at T

= +25

C, V

= 5V, V

= V

= 0V (unless otherwise noted)

Limits

Characteristic

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Output Leakage Current

CEX

OUT

= 80V

OUT

= 80V, T

= +70

100

Collector-Emitter

CE(SAT)

OUT

= 100mA

0.9

1.1

Saturation Voltage

OUT

= 200mA

1.1

1.3

OUT

= 350mA

1.3

1.6

Collector-Emitter

CE(SUS)

OUT

= 350mA, L = 2mH

Sustaining Voltage

Input Voltage

IN(0)

1.0

IN(1)

= 12V

10.5

= 10V

8.5

= 5.0V, Note 1

3.5

Input Resistance

= 12V

200

= 10V

300

= 5.0V

600

Supply Current

DD(ON)

All Drivers ON, V

= 12V

6.4

10.0

All Drivers ON, V

= 10V

6.0

9.0

All Drivers ON, V

= 5.0V

4.6

7.5

DD (1 ON)

One Driver ON, All others OFF, V

= 12V

3.1

4.5

One Driver ON, All others OFF, V

= 10V

2.9

4.5

One Driver ON, All others OFF, V

= 5V

2.3

3.6

DD(OFF)

All Drivers OFF, V

= 12V

2.6

4.2

All Drivers OFF, V

= 10V

2.4

3.6

All Drivers OFF, V

= 5.0V

1.9

3.0

Clamp Diode

= 80V

Leakage Current

Clamp Diode

= 350mA

1.7

2.0

Forward Voltage

Output Current

LIM

500

Shutdown Threshold

Start Up Voltage

Note 2

3.5

4.0

4.5

Minimum Supply (V

)

DD MIN

3.0

3.5

4.0

Thermal Shutdown

165

Thermal Shutdown Hysteresis

Note 1: Operation of these devices with standard TTL or DTL may require the use of appropriate pull-up resistors to insure a minimum logic "1".
Note 2: Undervoltage Lockout is guaranteed to release device at no more than 4.5V, and disable the device at no less than 3.0V.

7-52

October 1998

MIC58P42

Micrel

CLOCK

DATA IN

STROBE

OUTPUT

ENABLE

OUTN

Timing Conditions

= +25

C, Logic Levels are V

and V

), V

= 5V

A. Typical Data Active Time Before Clock Pulse (Data Set-Up Time) ........................................................................... 75 ns
B. Minimum Data Active Time After Clock Pulse (Data Hold Time) .............................................................................. 75 ns
C. Minimum Data Pulse Width ..................................................................................................................................... 150 ns
D. Minimum Clock Pulse Width .................................................................................................................................... 150 ns
E. Minimum Time Between Clock Activation and Strobe ............................................................................................. 300 ns
F. Minimum Strobe Pulse Width ................................................................................................................................... 100 ns
G. Typical Time Between Strobe Activation and Output Transition ............................................................................. 500 ns

SERIAL DATA present at the input is transferred to the shift register on the logic "0" to logic "1" transition of the CLOCK input
pulse. On succeeding CLOCK pulses, the registers shift data information towards the SERIAL DATA OUTPUT. The SERIAL
DATA must appear at the input prior to the rising edge of the CLOCK input waveform.

Information present at any register is transferred to its respective latch when the STROBE is high (serial-to-parallel conversion).
The latches will continue to accept new data as long as the STROBE is held high. Applications where the latches are bypassed
(STROBE tied high) will require that the ENABLE input be high to prevent invalid output states.

When the ENABLE input is high, all of the output buffers are disabled (OFF) without affecting information stored in the latches
or shift register. With the ENABLE input low, the outputs are controlled by the state of the latches. A positive OUTPUT ENABLE/
RESET pulse resets the output after a current shutdown fault. Thermal limit faults are not latched and require no reset pulse.

MIC58P42 Truth Table

Shift Register Contents

Serial

Latch Contents

Output Contents

Serial Data

Clock

Data

Strobe

Output

Input

Input I

......

Output

Input

......

Enable

...... I

......

O ......

X ......

......

......P

......

...... H

L = Low Logic Level
H = High Logic Level
X = Irrelevant
P = Present State
R = Previous State
O = Output OFF

October 1998

7-53

MIC58P42

Micrel

= 12V

Number of Outputs ON

OUT

= 200mA

Max. Allowable Duty Cycle at Ambient Temperature of:

= 12V)

80%

68%

60%

52%

44%

91%

77%

68%

59%

50%

100%

90%

79%

69%

58%

100%

95%

82%

69%

100%

86%

100%

Number of Outputs ON

OUT

= 200mA

Max. Allowable Duty Cycle at Ambient Temperature of:

= 5.0V)

85%

72%

64%

55%

46%

97%

82%

73%

63%

53%

100%

96%

85%

73%

62%

100%

88%

75%

100%

93%

100%

0.5

0.6

0.7

0.8

0.9

1.1

1.2

1.3

1.4

1.5

100

150

SATURATION VOLTAGE (V)

TEMPERATURE (°C)

Output Saturation

Voltage vs. Temperature

= 350mA

= 100mA

= 5V to 12V

100

150

SUPPLY CURRENT (mA)

TEMPERATURE (°C)

ALL OUTPUTS ON

ALL OUTPUTS OFF

Supply Current

vs. Temperature

= 5V

0.35

0.40

0.45

0.50

0.55

0.60

100

150

SHUTDOWN THRESHOLD (A)

TEMPERATURE (°C)

= 5V

= 12V

Current Shutdown

Threshold vs. Temperature

100

150

200

250

300

OUTPUT DELAY (ns)

SUPPLY VOLTAGE (V

)

OFF

Output Delay

vs. Supply Voltage

= 50

100

150

SUPPLY CURRENT (mA)

TEMPERATURE (°C)

Supply Current

vs. Temperature

ALL OUTPUTS ON

ALL OUTPUTS OFF

= 12V

0.3

0.4

0.5

0.6

0.7

0.8

0.9

CURRENT LIMIT DELAY (ľs)

OUTPUT CURRENT (A)

Current Shutdown

Delay vs. Output Current

= 12V

= 5V

Maximum Allowable Duty Cycle, Plastic DIP

= 5.0V

Typical Characteristic Curves

Part Number MIC58P42