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Número de pieza | UT54ACTS264 | |
Descripción | Look-Ahead Carry Generators | |
Fabricantes | Aeroflex Circuit Technology | |
Logotipo | ||
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UT54ACS264/UT54ACTS264
Look-Ahead Carry Generators for Counters
Datasheet
November 2010
www.aeroflex.com/logic
FEATURES
Performs look-ahead carry across n-bit counters
Accommodates active-high or active-low carry
Improves cascaded counters system performance
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
UT54ACS264- SMD 5962-96576
UT54ACTS264 - SMD 5962-96577
DESCRIPTION
The UT54ACS264 and the UT54ACTS264 are look-ahead gen-
erators designed specifically to perform a carry-anticipate across
any number of n-bit counters, thus increasing system clock fre-
quency. A carry enable CE, and carry outputs RCOA and RCOB
are provided for n-bit cascading.
Use the counter with either active-high-carry or active-low-car-
ry counters. For active-high-carry counters, CE is active high,
the A set of inputs and output RCOA are used. The B set of
inputs are connected to a low logic level. For active-low-carry
counters, CE is active low, the B set of inputs and output RCOB
are used. The A set of inputs are connected to a high logic level.
The devices are characterized over full military temperature
range of -55°C to +125°C.
PINOUTS
A1
B1
A0
B0
A3
B3
RCOB
VSS
16-Pin DIP
Top View
A1 1 16 VDD
B1 2 15 B2
A0 3 14 A2
B0 4 13 CE
A3 5 12 C0
B3 6 11 C1
RCOB 7 10 RCOA
VSS 8
9 C2
16-Lead Flatpack
Top View
1 16
2 15
3 14
4 13
5 12
6 11
7 10
89
VDD
B2
A2
CE
C0
C1
RCOA
C2
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
-200
8
200
V
mA
mA
-8 mA
2.1 mW/
MHz
10 μA
1.6 mA
15 pF
15 pF
5
5 Page Aeroflex Colorado Springs - Datasheet Definition
Advanced Datasheet - Product In Development
Preliminary Datasheet - Shipping Prototype
Datasheet - Shipping QML & Reduced Hi-Rel
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www.aeroflex.com
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
product or service from Aeroflex convey a license under any
patent rights, copyrights, trademark rights, or any other of the
intellectual rights of Aeroflex or of third parties.
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11
11 Page |
Páginas | Total 11 Páginas | |
PDF Descargar | [ Datasheet UT54ACTS264.PDF ] |
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