MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC14511B
BCD-To-Seven Segment
Latch/Decoder/Driver
The MC14511B BCD–to–seven segment latch/decoder/driver is
constructed with complementary MOS (CMOS) enhancement mode devices
and NPN bipolar output drivers in a single monolithic structure. The circuit
provides the functions of a 4–bit storage latch, an 8421 BCD–to–seven
segment decoder, and an output drive capability. Lamp test (LT), blanking
(BI), and latch enable (LE) inputs are used to test the display, to turn–off or
pulse modulate the brightness of the display, and to store a BCD code,
respectively. It can be used with seven–segment light–emitting diodes
(LED), incandescent, fluorescent, gas discharge, or liquid crystal readouts
either directly or indirectly.
Applications include instrument (e.g., counter, DVM, etc.) display driver,
computer/calculator display driver, cockpit display driver, and various clock,
watch, and timer uses.
•
•
•
•
•
•
•
•
•
•
Low Logic Circuit Power Dissipation
High–Current Sourcing Outputs (Up to 25 mA)
Latch Storage of Code
Blanking Input
Lamp Test Provision
Readout Blanking on all Illegal Input Combinations
Lamp Intensity Modulation Capability
Time Share (Multiplexing) Facility
Supply Voltage Range = 3.0 V to 18 V
Capable of Driving Two Low–power TTL Loads, One Low–power
Schottky TTL Load or Two HTL Loads Over the Rated Temperature
Range
•
Chip Complexity: 216 FETs or 54 Equivalent Gates
•
Triple Diode Protection on all Inputs
MAXIMUM RATINGS*
(Voltages Referenced to VSS)
Rating
Symbol
VDD
Vin
I
TA
PD
Tstg
IOHmax
POHmax
DC Supply Voltage
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
D SUFFIX
SOIC
CASE 751B
DW SUFFIX
SOIC
CASE 751G
ORDERING INFORMATION
MC14XXXBCP
Plastic
MC14XXXBCL
Ceramic
MC14XXXBDW
SOIC
MC14XXXBD
SOIC
TA = – 55° to 125°C for all packages.
PIN ASSIGNMENT
B
C
LT
BI
LE
D
A
VSS
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
f
g
a
b
c
d
e
e
d
f
a
g
b
c
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
Value
Unit
V
V
mA
– 0.5 to + 18
Input Voltage, All Inputs
DC Current Drain per Input Pin
Operating Temperature Range
Power Dissipation per Package†
Storage Temperature Range
Maximum Output Drive Current
(Source) per Output
Maximum Continuous Output Power
(Source) per Output ‡
– 0.5 to VDD + 0.5
10
– 55 to + 125
500
– 65 to + 150
25
50
DISPLAY
_
C
mW
0
1
Inputs
LE BI LT
X
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
D
X
X
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
C
X
X
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
B
X
X
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A
X
X
0
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
a
1
0
1
0
1
1
0
1
0
1
1
1
0
0
0
0
0
0
b
1
0
1
1
1
1
1
0
0
1
1
1
0
0
0
0
0
0
c
1
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
2
3
4
5
6
7
8
9
_
C
mA
mW
TRUTH TABLE
Outputs
d
1
0
1
0
1
1
0
1
1
0
1
0
0
0
0
0
0
0
e
1
0
1
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
f
1
0
1
0
0
0
1
1
1
0
1
1
0
0
0
0
0
0
g
1
0
0
0
1
1
1
1
1
0
1
1
0
0
0
0
0
0
Display
8
Blank
0
1
2
3
4
5
6
7
8
9
Blank
Blank
Blank
Blank
Blank
Blank
*
‡POHmax = IOH (VDD – VOH)
* 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
1 1 1
X
X
X
X
*
X = Don’t Care
* Depends upon the BCD code previously applied when LE = 0
REV 3
1/94
©
MOTOROLA CMOS LOGIC DATA
Motorola, Inc. 1995
MC14511B
361
MOTOROLA [ MOTOROLA, INC ]
