SEMICONDUCTOR TECHNICAL DATA
L SUFFIX
CERAMIC
CASE 623
The MC14534B is composed of five BCD ripple counters that have their
respective outputs multiplexed using an internal scanner. Outputs of each
counter are selected by the scanner and appear on four (BCD) pins.
Selection is indicated by a logic high on the appropriate digit select pin. Both
BCD and digit select outputs have three–state controls providing an
“open–circuit” when these controls are high and allowing multiplexing.
Cascading may be accomplished by using the carry–out pin. The counters
and scanner can be independently reset by applying a high to the counter
master reset (MR) and the scanner reset (SR). The MC14534B was
specifically designed for application in real time or event counters where
continual updating and multiplexed displays are used.
P SUFFIX
PLASTIC
CASE 709
DW SUFFIX
SOIC
CASE 751E
•
•
•
•
•
•
Four Operating Modes (See truth table)
Input Error Detection Circuit
Clock Conditioning Circuits for Slow Transition Inputs
Counter Sequences on Positive Transition of Clock A
Supply Voltage Range = 3.0 Vdc to 18 Vdc
Capable of Driving Two Low–power TTL Loads or One Low–power
Schottky TTL Load Over the Rated Temperature Range
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBDW
Plastic
Ceramic
SOIC
T
A
= – 55° to 125°C for all packages.
BLOCK DIAGRAM
TO CAPACITORS
22
1
V
= PIN 24
= PIN 12
DD
23
V
CLOCK B
CLOCK A
3
SS
PULSE ERROR
DETECTOR
ERROR OUT
PULSE
SHAPER
4
2
TEST
CONTROL
MASTER
RESET
UNITS
TENS
HUNDREDS
THOUSANDS
TEN
THOUSANDS
13
CARRY
CARRY OUT
C
÷
10
C
C
÷
10
C
C
÷
10
C
C
÷
10
C
C
÷
10
C
n+4
n+4
n+4
n+4
n+4
CONTROL
Q0
Q3
Q0
Q3
Q0
Q3
Q0
Q3
Q0
Q3
5
6
MODE A
MODE B
OUTPUT
17
18
MUX
MUX
MUX
MUX
CONTROL
Q3
Q2
MUX
BCD
OUT
19
20
SCANNER
RESET
Q1
Q0
9
R
10
SCANNER
CLOCK
SCANNER
3–STATE BCD
CONTROL
21
15
3–STATE DIGIT
CONTROL
3–State Control
Out
7
8
14
16
11
DS5
DS1
DS2
DS3
DS4
NOTE:
0
1
Q or DS
High Impedance
= 3–STATE
DIGIT SELECT
OUTPUT BUFFER
REV 3
1/94
Motorola, Inc. 1995
MOTOROLA CMOS LOGIC DATA
MC14534B
1