MC14544BCP Freescale Semiconductor, Inc, MC14544BCP Datasheet

MC14544BCP

Manufacturer Part Number

MC14544BCP

Description

Manufacturer

Freescale Semiconductor, Inc

Datasheet

1.MC14544BCP.pdf (7 pages)

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Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î

MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

BCD-to-Seven Segment

Latch/Decoder/Driver for

Liquid Crystals

CMOS MSI (Low–Power Complementary MOS)

for use with liquid crystal readouts, and is constructed with complementary

MOS (CMOS) enhancement mode devices. The circuit provides the

functions of a 4–bit storage latch and an 8421 BCD–to–seven segment

decoder and driver. The device has the capability to invert the logic levels of

the output combination. The phase (Ph), blanking (BI), and latch disable (LD)

inputs are used to reverse the truth table phase, blank the display, and store

a BCD code, respectively. For liquid crystal (LC) readouts, a square wave is

applied to the Ph input of the circuit and the electrically common backplane

of the display. The outputs of the circuit are connected directly to the

segments of the LC readout. The Ripple Blanking Input (RBI) and the Ripple

Blanking Output (RBO) can be used to suppress either leading or trailing

zeroes.

incandescent, gas discharge, and fluorescent readouts, connection dia-

grams are given on this data sheet.

computer/calculator display driver, cockpit display driver, and various clock,

watch, and timer uses.

* P OHmax = I OH (V OH – V DD ) and P OLmax = I OL (V OL – V SS )

* Maximum Ratings are those values beyond which damage to the device may occur.

†Temperature Derating:

REV 3

1/94

MAXIMUM RATINGS*

DC Supply Voltage

Input Voltage, All Inputs

DC Input Current per Pin

Operating Temperature Range

Power Dissipation, per Package†

Storage Temperature Range

Maximum Continuous Output Drive

Current (Source or Sink) per Output

Maximum Continuous Output Power*

(Source or Sink) per Output

MOTOROLA CMOS LOGIC DATA

The MC14544B BCD–to–seven segment latch/decoder/driver is designed

For other types of readouts, such as light–emitting diode (LED),

Applications include instrument (e.g., counter, DVM etc.) display driver,

Motorola, Inc. 1995

Latch Storage of Code

Blanking Input

Readout Blanking on All Illegal Input Combinations

Direct LED (Common Anode or Cathode) Driving Capability

Supply Voltage Range = 3.0 V to 18 V

Capability for Suppression of Non–significant zero

Capable of Driving Two Low–power TTL Loads, One Low–power

Schottky TTL Load or Two HTL Loads Over the Rated Temperature

Range

Plastic “P and D/DW” Packages: – 7.0 mW/ _ C From 65 _ C To 125 _ C

Ceramic “L” Packages: – 12 mW/ _ C From 100 _ C To 125 _ C

Rating

(Voltages referenced to V SS )

P OHmax

P OLmax

Symbol

I OHmax

I OLmax

V DD

T stg

V in

P D

T A

I in

– 0.5 to V DD + 0.5

– 55 to + 125

– 65 to + 150

– 0.5 to + 18

Value

500

mAdc

Unit

_ C

guard against damage due to high static

voltages or electric fields. However, pre-

cautions must be taken to avoid applications of

any voltage higher than maximum rated volt-

ages to this high–impedance circuit. For proper

operation, V in and V out should be constrained

to the range V SS

appropriate logic voltage level (e.g., either V SS

or V DD ). Unused outputs must be left open.

RBO

This device contains protection circuitry to

Unused inputs must always be tied to an

V SS

PIN ASSIGNMENT

T A = – 55 to 125 C for all packages.

ORDERING INFORMATION

MC14XXXBCP

MC14XXXBCL

MC14544B

DISPLAY

(V in or V out )

V DD

RBI

CERAMIC

CASE 726

CASE 707

L SUFFIX

P SUFFIX

PLASTIC

Plastic

Ceramic

MC14544B

V DD .

Related parts for MC14544BCP

MC14544BCP Summary of contents

Page 1

MOTOROLA SEMICONDUCTOR TECHNICAL DATA BCD-to-Seven Segment Latch/Decoder/Driver for Liquid Crystals CMOS MSI (Low–Power Complementary MOS) The MC14544B BCD–to–seven segment latch/decoder/driver is designed for use with liquid crystal readouts, and is constructed with complementary MOS (CMOS) enhancement mode devices. The circuit ...

Page 2

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 3

Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î Î ...

Page 4

CONNECTIONS TO VARIOUS DISPLAY READOUTS LIQUID CRYSTAL (LC) READOUT MC14544B ONE OF SEVEN SEGMENTS OUTPUT Ph LIGHT EMITTING DIODE (LED) READOUT COMMON CATHODE LED MC14544B OUTPUT NOTE: Bipolar transistors may be added for gain (for V DD ...

Page 5

5.0 Vdc P OHmax = 70 mWdc – 6 Vdc – 12 – Vdc Vdc – 24 – 16 – 12 – 8.0 ...

Page 6

TYPICAL APPLICATIONS FOR RIPPLE BLANKING a – – – – – – – – – – g CONNECT TO RBI RBO RBI RBO MC14544B MC14544B INPUT ...

Page 7

SEATING PLANE 0.25 (0.010 SEATING PLANE H G Motorola reserves the right to make changes without further ...

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