MC14544BCP Motorola, MC14544BCP Datasheet

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MC14544BCP

Manufacturer Part Number
MC14544BCP
Description
BCD-to-seven segment latch/decoder/driver for liquid crystals
Manufacturer
Motorola
Datasheet

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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
10
70
10
mAdc
mAdc
Unit
mW
mW
_ C
_ C
V
V
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.
0
RBO
This device contains protection circuitry to
Unused inputs must always be tied to an
V SS
PH
PIN ASSIGNMENT
LD
T A = – 55 to 125 C for all packages.
BI
D
C
A
B
1
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14544B
1
2
3
4
5
6
7
8
9
2
3
DISPLAY
v
18
17
16
15
14
13
12
11
10
4
(V in or V out )
V DD
f
g
e
d
c
b
a
RBI
5
6
CERAMIC
CASE 726
CASE 707
L SUFFIX
P SUFFIX
PLASTIC
Plastic
Ceramic
e
v
f
MC14544B
7
d
V DD .
g
a
8
c
b
9
1

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MC14544BCP Summary of contents

Page 1

... Maximum Ratings are those values beyond which damage to the device may occur. †Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW From 125 _ C Ceramic “L” Packages: – From 100 125 _ C REV 3 1/94 MOTOROLA CMOS LOGIC DATA Motorola, Inc. 1995 Symbol Value Unit V DD – ...

Page 2

... Adc 5.0 7.5 — — pF 0.005 5.0 — 150 Adc 0.010 10 — 300 0.015 20 — 600 Adc MOTOROLA CMOS LOGIC DATA ...

Page 3

... PHL = (1.7 ns/pF 420 ns t PHL = (0.66 ns/pF 172 ns t PHL = (0.5 ns/pF 130 ns Setup Time Hold Time Latch Disable Pulse Width (Strobing Data) * The formulas given are for the typical characteristics only PIN PIN MOTOROLA CMOS LOGIC DATA ( pF Symbol TLH 5 THL 5 PLH 5.0 ...

Page 4

... RBO = RBI Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank Blank ** ** Inverse of Output Display Combinations Above as above INCANDESCENT READOUT APPROPRIATE VOLTAGE MC14544B OUTPUT GAS DISCHARGE READOUT APPROPRIATE VOLTAGE MC14544B OUTPUT MOTOROLA CMOS LOGIC DATA ...

Page 5

... All outputs connected to respective C L loads AND C 90% 50% 10 50% DUTY CYCLE ANY OUTPUT Figure 3. Dynamic Power Dissipation Signal Waveforms MOTOROLA CMOS LOGIC DATA 6 5.0 Vdc 0 – 4 – SINK DEVICE VOLTAGE (Vdc) Figure 2. Typical Output Sink (a) Inputs D, Ph, and BI low, and Inputs A, B, and LD high. ...

Page 6

... RBI RBO RBI RBO MC14544B MC14544B (1) (3) a – – – – – – – – – – g CONNECT TO RBI RBO RBI RBO MC14544B MC14544B INPUT CODE (0) (0) MOTOROLA CMOS LOGIC DATA ...

Page 7

... Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur ...

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