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74ACT163TTR датащи(PDF) 1 Page - STMicroelectronics

номер детали 74ACT163TTR
подробное описание детали  SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
Download  13 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74ACT163TTR датащи(HTML) 1 Page - STMicroelectronics

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April 2001
s
HIGH SPEED:
fMAX = 250MHz (TYP.) at VCC = 5V
s
LOW POWER DISSIPATION:
ICC = 8µA(MAX.) at TA=25°C
s
COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.), VIL = 0.8V (MAX.)
s
50
Ω TRANSMISSION LINE DRIVING
CAPABILITY
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN)
s
BALANCED PROPAGATION DELAYS:
tPLH tPHL
s
OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 163
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74ACT163 is an advanced high-speed CMOS
SYNCRONOUS
PRESETTABLE
COUNTER
fabricated
with
sub-micron silicon gate and
double-layer metal wiring C2MOS tecnology. It is a
4 bit binary counter with Synchronous Clear.
The circuit have four fundamental modes of
operation, in order of preference: synchronous
reset, parallel load, count-up and hold. Four
control inputs, Master Reset (CLEAR), Parallel
Enable Input (LOAD), Count Enable Input (PE)
and Count Enable Carry Input (TE), determine the
mode of operation as shown in the Truth Table. A
LOW signal on CLEAR overrides counting and
parallel loading and sets all outputs on LOW state
on the next rising edge of CLOCK . A LOW signal
on
LOAD
overrides
counting
and
allows
information on Parallel Data inputs to be loaded
into the flip-flop on the next rising edge of CLOCK.
With LOAD and CLEAR HIGH, PE and TE permit
counting when both are HIGH. Conversely, a
LOW signal on either PE and TE inhibits counting.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
All
inputs
and
outputs
are
equipped
with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74ACT163
SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
TUBE
T & R
DIP
74ACT163B
SOP
74ACT163M
74ACT163MTR
TSSOP
74ACT163TTR
TSSOP
DIP
SOP


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