M54975FP Mitsumi Electronics, Corp., M54975FP Datasheet

M54975FP

Manufacturer Part Number

M54975FP

Description

Manufacturer

Mitsumi Electronics, Corp.

Datasheet

1.M54975FP.pdf (5 pages)

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DESCRIPTION

The M54975 is a semiconductor integrated circuit fabricated using

Bi-CMOS technology. It contains a serial input to serial/parallel

output 8-bit CMOS shift register and CMOS latch as well as bipolar

8-bit parallel-output driver.

FEATURES

APPLICATION

Thermal printer head dot driver, Serial-to parallel conversion, Relay

and Solenoid driver

FUNCTION

The M54975 consists of an 8-bit D-type flip-flop, the output of

which is connected to 8 latches.

When data is applied to the serial data input (S-IN) and a clock

pulse is applied to clock input (T), an “L” to “H” change of the clock

will cause the data input signals to enter the internal shift registers

and the data in the shift registers will be shifted in order.

BLOCK DIAGRAM

Serial input to serial/parallel output

Cascade connections possible through serial output

Latch circuit included for each stage

Enable input for output control

Serial input/output level is compatible with standard CMOS

Driver : Withstand voltage ...................................... BV

Wide operating temperature range ..................... T

Low supply current .................................. I

Power supply

Enable input

Serial input

Latch input

Large drive current ................................ (I

Clock

LATCH

S-IN

L-GND

Logic GND

10 A at standby

O(max)

L D

=-20 – +75 C

CEO

=300mA)

L D

30V

Parallel outputs

L D

Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER

Using a number of M54975 units for bit expansion in series will

entail connecting serial output (S-OUT) to S-IN of the next-stage

M54975.

In parallel output, when the latch input is set to “H” and the output-

control input (enable input EN) is “L”, a clock pulse changing from

“L” to “H” will cause the serial data input signal to appear at output

O1, and the data will be shifted in order at outputs O2 – O8.

The parallel output will yield a signal that is inverted with respect to

the serial data input.

Setting the LATCH input to “L” will prevent data from entering the

latch.

When the EN input is set to “H”, all outputs (O1 – O8) will be set to

OFF. Since the internal logic state of the IC is uncertain at power-

on time, set the EN input to “H” (and outputs O1 – O8 will set to

PIN CONFIGURATION (TOP VIEW)

Serial output

Enable input

Driver GND

Serial input

Logic GND

Latch input

L D

Clock

MITSUBISHI <CONTROL / DRIVER IC>

L D

LATCH

P-GND

L-GND

S-OUT

S-IN

Outline

16P4(P)

16P2N-A(FP)

M54975P/FP

P-GND

S-OUT

Driver GND

Serial output

Parallel outputs

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M54975FP Summary of contents

Page 1

DESCRIPTION The M54975 is a semiconductor integrated circuit fabricated using Bi-CMOS technology. It contains a serial input to serial/parallel output 8-bit CMOS shift register and CMOS latch as well as bipolar 8-bit parallel-output driver. FEATURES Serial input to serial/parallel output ...

Page 2

OFF) until the input data is set and the internal logic state has been determined. L-GND is the ground of the CMOS logic circuit section and P-GND TIMING CHART S-IN T LATCH ...

Page 3

... Clock pulse fall time f(T) MITSUBISHI <CONTROL / DRIVER IC> Bi-CMOS 8-BIT SERIAL-INPUT LATCHED DRIVER =- Conditions S-OUT O1 – OFF O1 – M54975P T = M54975FP Conditions O1 – OFF M54975P M54975FP = =5V, unless otherwise noted Test conditions T =-20 – =4. =0.4V OL ...

Page 4

TIMING CHART Serial input S-IN Clock T Latch input LATCH SWITCHING CHARACTERISTICS (T Symbol Parameter Low-to-high-level output propagation time t PLH From input T to output S-OUT High-to-low-level output propagation time t PHL From input T to output S-OUT Low-to-high-level ...

Page 5

... Current value : output current per circuit 100 0 M54975P/FP Driver output 0.5 1.0 1.5 (V) OL (M54975P 100 Duty cycle (%) (M54975FP) – 5. 100 Duty cycle (%) ...

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