MC14547B Datasheet, PDF (1/7 Pages) Motorola, Inc – HIGH CURRENT BCD-TO-SEVEN SEGMENT DECODER/DRIVER

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
High Current BCD-to-Seven
Segment Decoder/Driver
The MC14547 BCD–to–seven segment 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 an 8421 BCD–to–seven segment decoder with high output drive
capability. Blanking (BI), can be used to turn off or pulse modulate the
brightness of the display. The MC14547 can drive seven–segment
light–emitting diodes (LED), incandescent, fluorescent or gas discharge
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.
• High Current Sourcing Outputs (Up to 65 mA)
• Low Logic Circuit Power Dissipation
• Supply Voltage Range = + 3.0 V to + 18 V
• Blanking Input
• Readout Blanking on All Illegal Combinations
• Lamp Intensity Modulation Capability
• Multiplexing Capability
• Capable of Driving Two Low–Power TTL Loads, One Low–Power
Schottky TTL Load or Two HTL Loads over the Rated Temperature
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _Range
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ^{• Use MC14511B for Applications Requiring Data Latches}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{MAXIMUM RATINGS* (Voltages referenced to VSS, Pin 8)}
Rating
Symbol
Value
Unit
DC Supply Voltage
Input Voltage, All Inputs
Operating Temperature Range
Storage Temperature Range
Maximum Continuous Output Drive
Current (Source) per Output
VDD
– 0.5 to + 18
V
Vin – 0.5 to VDD + 0.5 V
TA
– 55 to + 125
_C
Tstg
– 65 to + 150
_C
IOHmax
65
mA
Maximum Continuous Power Dissipation
PD
1200*
mW
* Maximum Ratings are those values beyond which damage to the device may occur.
* See Power Derating Curve Figure 1.
This device contains circuitry to protect the inputs against damage
due to high static voltages or electric fields; however, it is advised that
normal precautions be taken to avoid application of any voltage higher
than maximum rated voltages to this high-impedance circuit. A destruc-
tive high current mode may occur if Vin and Vout is not constrained to
the range VSS ≤ (Vin or Vout) ≤ VDD.
Due to the sourcing capability of this circuit, damage can occur to the
device if VDD is applied, and the outputs are shorted to VSS and are at a
logical 1 (See Maximum Ratings).
Unused inputs must always be tied to an appropriate logic voltage
level (e.g., either VSS or VDD).
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14547B
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
DW SUFFIX
SOIC
CASE 751G
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBDW
Plastic
Ceramic
SOIC
TA = – 55° to 125°C for all packages.
B1
C2
NC 3
BI 4
NC 5
D6
A7
VSS 8
16 VDD
15 f
14 g
13 a
12 b
11 c
10 d
9e
DISPLAY
a
f gb
e
c
d
012 345 6789
TRUTH TABLE
Inputs
Outputs
BI D C B A a b c d e f g
0 X X XX0 0 0 0 0 0 0
1 0 0 001111110
1 0 0 010110000
1 0 0 101101101
1 0 0 111111001
1 0 1 000110011
1 0 1 011011011
1 0 1 100011111
1 0 1 111110000
1 1 0 001111111
1 1 0 011110011
1 1 0 100000000
1 1 0 110000000
1 1 1 000000000
1 1 1 010000000
1 1 1 100000000
1 1 1 110000000
X = Don’t care
Display
Blank
0
1
2
3
4
5
6
7
8
9
Blank
Blank
Blank
Blank
Blank
Blank
MC14547B
1