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參數(shù)資料
| 型號： | M74HC697B1R |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 計數(shù)器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 1507K |
| 代理商： | M74HC697B1R |
1/16
July 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 697
DESCRIPTION
The M74HC697 is an high speed CMOS UP /
DOWN
COUNTER
REGISTER
(3
STATE)
fabricated with sub-micron silicon gate C2MOS
technology.
The M74HC697 is a 4 BIT BINARY COUNTER
with REGISTER.
The device counts on the positive edge of the
counter clock input (CCK) when selected by the
"Counter Mode". If the input U/D is held "H", the
internal counter counts up, and held "L", counts
down. The internal counter’s outputs are stored in
the output register at the positive edge of register
clock (RCK).
The counter features enable P and enable T 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. Both
the counter clock CCR and register clock RCK are
positive-edge triggered. The counter clear CCLR
is active low and is asynchronous.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
M74HC697
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
PACKAGE
TUBE
T & R
DIP
M74HC697B1R
SOP
M74HC697M1R
M74HC697RM13TR
TSSOP
M74HC697TTR
TSSOP
DIP
SOP
U/D 4 BIT BINARY COUNTER/REGISTER (3-STATE)
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