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PDF UT54ACS169 Data sheet ( Hoja de datos )
| Número de pieza | UT54ACS169 | |
| Descripción | 4-Bit Up-Down Binary Counters | |
| Fabricantes | Aeroflex Circuit Technology | |
| Logotipo |  |
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Standard Products
UT54ACS169/UT54ACTS169
4-Bit Up-Down Binary Counters
Datasheet
November 2010
www.aeroflex.com/logic
FEATURES
Fully synchronous operation for counting and programming
Internal look-ahead for fast counting
Carry output for n-bit cascading
Fully independent clock circuit
1.2μ CMOS
- Latchup immune
High speed
Low power consumption
Single 5 volt supply
Available QML Q or V processes
Flexible package
- 16-pin DIP
- 16-lead flatpack
UT54ACS169 - SMD 5962-96560
UT54ACTS169 - SMD 5962-96561
DESCRIPTION
The UT54ACS169 and the UT54ACTS169 are synchronous 4-
bit binary counters that feature an internal carry look-ahead for
cascading in high-speed counting applications. Synchronous
operation is provided by having all flip-flops clocked simulta-
neously so that the outputs change coincident with each other
when instructed by the count-enable inputs and internal gating.
Synchronous operation helps eliminate the output counting
spikes that are normally associated with asynchronous (ripple
clock) counters. The clock input triggers the four flip-flops on
the rising (positive-going) edge of the clock.
The counters are fully programmable (i.e., the outputs may each
be preset high or low). The load input circuitry allows loading
with the carry-enable output of cascaded counters. Loading is
synchronous; applying a low level at the load input disables the
counter and causes the outputs to agree with the data inputs after
the next clock pulse.
The carry look-ahead circuitry provides for cascaded counters
for n-bit synchronous application without additional gating. In-
strumental in accomplishing this function are two count-enable
inputs and a carry output. Assert both count enable inputs (ENP
and ENT) to count. The direction of the count is determined by
the level of the U/D input. When U/D is high, the counter counts
up; when low, it counts down. Input ENT is fed forward to
enable the carry output. The ripple carry output
RCO enables a low-level pulse while the count is zero (all inputs
low) counting down or maximum (15) counting up. The low-
level overflow carry pulse can be used to enable successive cas-
caded stages.
PINOUTS
16-Pin DIP
Top View
U/D
CLK
A
B
C
D
ENP
VSS
1
2
3
4
5
6
7
8
16 VDD
15 RCO
14 QA
13 QB
12 QC
11 QD
10 ENT
9 LOAD
16-Lead Flatpack
Top View
U/D
CLK
A
B
C
D
ENP
VSS
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
VDD
RCO
QA
QB
QC
QD
ENT
LOAD
Transitions at ENP or ENT are allowed regardless of the level
of the clock input.
The counters feature a fully independent clock circuit. Changes
at control inputs (ENP, ENT, LOAD, U/D) that modify the op-
erating mode have no effect on the contents of the counter until
clocking occurs. The function of the counter (whether enabled,
disabled, loading, or counting) will be dictated solely by the
conditions meeting the stable setup and hold times.
The devices are characterized over full military temperature
range of -55°C to +125°C.
1
1 page  
DC ELECTRICAL CHARACTERISTICS 7
(VDD = 5.0V ±10%; VSS = 0V 6, -55°C < TC < +125°C); Unless otherwise noted, Tc is per the temperature range ordered.
SYMBOL
VIL
VIH
IIN
VOL
VOH
IOS
IOL
IOH
Ptotal
PARAMETER
Low-level input voltage 1
ACTS
ACS
High-level input voltage 1
ACTS
ACS
Input leakage current
ACTS/ACS
Low-level output voltage 3
ACTS
ACS
High-level output voltage 3
ACTS
ACS
Short-circuit output current 2 ,4
ACTS/ACS
Output current10
(Sink)
Output current10
(Source)
Power dissipation 2, 8, 9
IDDQ
ΔIDDQ
Quiescent Supply Current
Quiescent Supply Current Delta
ACTS
CIN
COUT
Input capacitance 5
Output capacitance 5
CONDITION
VIN = VDD or VSS
IOL = 8.0mA
IOL = 100μA
IOH = -8.0mA
IOH = -100μA
VO = VDD and VSS
VIN = VDD or VSS
VOL = 0.4V
VIN = VDD or VSS
VOH = VDD - 0.4V
CL = 50pF
VDD = 5.5V
For input under test
VIN = VDD - 2.1V
For all other inputs
VIN = VDD or VSS
VDD = 5.5V
ƒ = 1MHz @ 0V
ƒ = 1MHz @ 0V
MIN
.5VDD
.7VDD
-1
MAX
UNIT
0.8
.3VDD
V
V
1 μA
0.40 V
0.25
.7VDD
VDD-0.25
V
-200 200 mA
8 mA
-8 mA
2.3 mW/
MHz
10 μA
1.6 mA
15 pF
15 pF
5
5 Page 
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Aeroflex UTMC Microelectronic Systems Inc. (Aeroflex)
reserves the right to make changes to any products and
services herein at any time without notice. Consult Aeroflex
or an authorized sales representative to verify that the
information in this data sheet is current before using this
product. Aeroflex does not assume any responsibility or
liability arising out of the application or use of any product
or service described herein, except as expressly agreed to in
writing by Aeroflex; nor does the purchase, lease, or use of a
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patent rights, copyrights, trademark rights, or any other of the
intellectual rights of Aeroflex or of third parties.
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11
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet UT54ACS169.PDF ] | |
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