Aeroflex UTMC UT54ACTS193, UT54ACS193 Datasheet
137 RadHard MSI Logic
UT54ACS193/UT54ACTS193
Radiation-Hardened
Synchronous 4-Bit Up-Down Dual Clock Counters
FEATURES
Look-ahead circuitry enhances cascaded counters
Fully synchronous in count modes
Asynchronous clear
radiation-hardened CMOS
- Latchup immune
High speed
Low power consumption
Single 5 volt supply
Available QML Q or V processes
Flexible package
16-pin DIP
-
DESCRIPTION
The UT54ACS193 and the UT54ACTS193 are synchronous 4-
operation is provided by having all flip-flops clocked
simultaneously so that the outputs change coincident with each
output counting spikes normally associated with asynchronous
counters.
level transition of either count input (Up or Down). The direction of the counting is determined by which count input is pulsed
The counters are fully programmable. The outputs may be preset to either level by placing a low on the load input and entering
agree with the data inputs independently of the count pulses.
Asynchronous loading allows the counters to be used as modu-
preset inputs.
A clear input has been provided that forces all outputs to the low
pendent of the count and the load inputs.
The counter is designed for efficient cascading without the need
BO) produces a low-
Similarly, the carry output (CO
while the count is maximum
PINOUTS
Top View
16-Lead Flatpack
FUNCTION TABLE
FUNCTION CLOCK UPCLOCK
DOWN
CLR LOAD
Count Up H L H
Count Down H L H
Reset X X H X
Load Preset
Input
X X L L
1
2
3
4
5
7
6
16
15
14
13
12
10
11
B
Q
B
Q
A
DOWN
UP
Q
C
Q
D
V
DD
A
CLR
BO
CO
C
8 9
V
SS
D
LOAD
1
2
3
4
5
7
6
16
15
14
13
12
10
11
V
DD
8 9
B
Q
B
Q
A
DOWN
UP
Q
C
Q
D
A
CLR
BO
CO
LOAD
C
V
SS
D
RadHard MSI Logic 138
UT54ACS193/UT54ACTS193
LOGIC SYMBOL
(14)
CLR
(5)
UP
G1
CT=0
CTRDIV 16
(4)
DOWN
(15)
A
(1)
B
(10)
C
(9)
D
(12)
(3)
Q
A
(7)
Q
D
(6)
Q
C
(2)
Q
B
3D
(1)
(2)
(4)
(8)
2+
G2
(11)
LOAD C3
(13)
BO
2CT=0
1-
CO
1CT=15
Note:
1. Logic symbol in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
139 RadHard MSI Logic
UT54ACS193/UT54ACTS193
LOGIC DIAGRAM
A
DOWN
UP
CLR
LOAD
(15)
(4)
(5)
(1)
(10)
(9)
(14)
(11)
Q
(7)
(6)
(2)
(3)
(12)
(13)
B
C
D
BO
CO
D
C
B
A
Q
Q
Q
C
Q
R
S
Q
C
Q
R
S
Q
C
Q
R
S
Q
C
Q
R
S
Q
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