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PDF 54AC161 Data sheet ( Hoja de datos )
| Número de pieza | 54AC161 | |
| Descripción | Synchronous Presettable Binary Counter | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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November 1998
54AC161 • 54ACT161
Synchronous Presettable Binary Counter
General Description
The ’AC/’ACT161 are high-speed synchronous modulo-16
binary counters. They are synchronously presettable for ap-
plication in programmable dividers and have two types of
Count Enable inputs plus a Terminal Count output for versa-
tility in forming synchronous multistage counters. The ’AC/
’ACT161 has an asynchronous Master Reset input that over-
rides all other inputs and forces the outputs LOW.
n Synchronous counting and loading
n High-speed synchronous expansion
n Typical count rate of 125 MHz
n Outputs source/sink 24 mA
n ’ACT161 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’AC161: 5962-89561
— ’ACT161: 5962-91722
Features
n ICC reduced by 50%
Logic Symbols
DS100274-1
Pin Names
CEP
CET
CP
MR
P0– P3
PE
Q0– Q3
TC
Description
Count Enable Parallel Input
Count Enable Trickle Input
Clock Pulse Input
Asynchronous Master Reset Input
Parallel Data Inputs
Parallel Enable Inputs
Flip-Flop Outputs
Terminal Count Output
IEEE/IEC
DS100274-2
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACT™ is a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100274
www.national.com
1 page  
Absolute Maximum Ratings (Note 1)
Recommended Operating
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (VCC)
DC Input Diode Current (IIK)
VI = −0.5V
VI = VCC + 0.5V
DC Input Voltage (VI)
DC Output Diode Current (IOK)
VO = −0.5V
VO = VCC + 0.5V
DC Output Voltage (VO)
DC Output Source
or Sink Current (IO)
DC VCC or Ground Current
per Output Pin (ICC or IGND)
Storage Temperature (TSTG)
Junction Temperature (TJ)
CDIP
−0.5V to +7.0V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
−20 mA
+20 mA
−0.5V to VCC + 0.5V
±50 mA
±50 mA
−65˚C to +150˚C
175˚C
Conditions
Supply Voltage (VCC)
’AC
2.0V to 6.0V
’ACT
4.5V to 5.5V
Input Voltage (VI)
Output Voltage (VO)
Operating Temperature (TA)
54AC/ACT
0V to VCC
0V to VCC
−55˚C to +125˚C
Minimum Input Edge Rate (∆V/∆t)
’AC Devices
VIN from 30% to 70% of VCC
VCC @ 3.3V, 4.5V, 5.5V
Minimum Input Edge Rate (∆V/∆t)
125 mV/ns
’ACT Devices
VIN from 0.8V to 2.0V
VCC @ 4.5V, 5.5V
125 mV/ns
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT™ circuits outside databook specifications.
DC Characteristics for ’AC Family Devices
Symbol
Parameter
VIH Minimum High Level
Input Voltage
VIL Maximum Low Level
Input Voltage
VOH Minimum High Level
Output Voltage
VOL Maximum Low Level
Output Voltage
IIN
IOLD
IOHD
ICC
Maximum Input
Leakage Current
Minimum Dynamic
Output Current (Note 3)
Maximum Quiescent
54AC
VCC
TA =
Units
(V) −55˚C to +125˚C
Conditions
Guaranteed Limits
3.0 2.1
VOUT = 0.1V
4.5 3.15 V or VCC − 0.1V
5.5 3.85
3.0 0.9
VOUT = 0.1V
4.5 1.35 V or VCC − 0.1V
5.5 1.65
3.0 2.9
IOUT = −50 µA
4.5 4.4 V
5.5 5.4
(Note 2)
VIN = VIL or VIH
3.0 2.4
IOH = −12 mA
4.5 3.7 V IOH = −24 mA
5.5 4.7
IOH = −24 mA
3.0 0.1
IOUT = 50 µA
4.5 0.1 V
5.5 0.1
(Note 2)
VIN = VIL or VIH
3.0 0.5
IOL = 12 mA
4.5 0.5 V IOL = 24 mA
5.5 0.5
IOL = 24 mA
5.5
±1.0
µA VI = VCC, GND
5.5 50 mA VOLD = 1.65V Max
5.5 −50 mA VOHD = 3.85V Min
5.5 160 µA VIN = VCC
5 www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
20 Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
16 Lead Ceramic Dual-In-Line Package (D)
NS Package Number J16A
11
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11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 54AC161.PDF ] | |
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