MC14558B Datasheet, PDF (1/7 Pages) Motorola, Inc – BCD-TO-SEVEN SEGMENT DECODER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
BCD-to-Seven Segment
Decoder
The MC14558B decodes 4–bit binary coded decimal data dependent on
the state of auxiliary inputs, Enable and RBI, and provides an active–high
seven–segment output for a display driver.
An auxiliary input truth table is shown, in addition to the BCD to
seven–segment truth table, to indicate the functions available with the two
auxiliary inputs.
Leading Zero blanking is easily obtained with an external flip–flop in time
division multiplexed systems displaying most significant decade first.
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
• Segment Blanking for All Illegal Input Combinations
• Lamp Test Function
• Capability for Suppression of Non–Significant Zeros
• Lamp Intensity Function
• Capable of Driving Two Low–power TTL Loads. One Low–power
Schottky TTL Load or Two HTL Loads Over the Rated Temperature
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Range
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{MAXIMUM RATINGS* (Voltages referenced to VSS)}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Rating
Symbol
Value
Unit
DC Supply Voltage
VDD
– 0.5 to + 18
V
Input Voltage, All Inputs
Vin – 0.5 to VDD + 0.5 V
DC Input Voltage, per Pin
Iin
± 10
mAdc
Operating Temperature Range
TA
– 55 to + 125
_C
Power Dissipation, per Package†
PD
500
mW
Storage Temperature Range
Tstg
– 65 to + 150
_C
* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
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
AUXILIARY INPUT TRUTH TABLE
Enable
Pin 3
RBI
Pin 5
BCD
Input
Code
RBO
Pin 4
Function Performed
0
0
X
0
Lamp Test
0
1
X
1
Blank Segments
1
1
0
1
Display Zero
1
0
0
0
Blank Segments
1
X
1–9
1
1–9 Displayed
X = Don’t Care
RBI = Ripple Blanking Input
RBO = Ripple Blanking Output
MC14558B
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBD
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
PIN ASSIGNMENT
B1
C2
ENABLE 3
RBO 4
RBI 5
D6
A7
VSS 8
16 VDD
15 f
14 g
13 a
12 b
11 c
a
f gb
e
c
d
10 d
9e
DISPLAY
012 345 6789
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14558B
1