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參數(shù)資料
| 型號： | M74HC690M1R |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 計數(shù)器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP DECADE COUNTER, PDSO20 |
| 封裝： | SO-20 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 839K |
| 代理商： | M74HC690M1R |
1/17
August 2001
s
HIGH SPEED:
fMAX = 53 MHz (TYP.) at VCC = 6V
s
LOW POWER DISSIPATION:
ICC = 4A(MAX.) at TA=25°C
s
HIGH NOISE IMMUNITY:
VNIH = VNIL = 28 % VCC (MIN.)
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 6mA (MIN) for QA to QD OUTPUT
|IOH| = IOL = 4mA (MIN) for RCO OUTPUT
s
BALANCED PROPAGATION DELAYS:
tPLH tPHL
s
WIDE OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 690
DESCRIPTION
The
M74HC690
is
an
high
speed
CMOS
DECADE/COUNTER
REGISTER
(3
STATE)
fabricated with silicon gate C2MOS technology.
The internal circuit is composed of 3 stages
including buffer output, which offers high noise
immunity
and
stable
output.
This
device
incorporates a synchronous counter, four bit
D-type register, and quadruple two-line to one-line
multiplexers with three-state outputs in a single 20
pin package. The counter can be programmed
from the data inputs and have enable P and
enable T inputs and a ripple carry output for easy
expansion. The register/counter select input, R/C,
selects the counter when low or the register when
high for the three state-outputs, QA, QB, QC, and
QD. If the LOAD input (LOAD) is held "L" DATA
input (A - D) are loaded into the internal counter at
positive edge of counter clock input (CCK). In the
counter mode, internal counter counts up at the
positive edge of the counter clock. If the counter
clear inputs (CCLR) is held "L", the internal
counter is cleared asynchronously to the counter
clock. The internal counter’s outputs are stored in
the output register at the positive edge of the
register clock (RCK). If the register clear input
(RCLR) is held "L" the register is cleared
asynchronously to register clock.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HC690
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
TUBE
T & R
DIP
M74HC690B1R
SOP
M74HC690M1R
M74HC690RM13TR
TSSOP
M74HC690TTR
TSSOP
DIP
SOP
DECADE COUNTER/REGISTER (3-STATE)
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