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参数资料
| 型号： | M74HC697C1R |
| 厂商： | 意法半导体 |
| 元件分类： | 计数器 |
| 英文描述： | HC697/699 U/D 4 BIT BINARY COUNTER/REGISTER 3-STATE HC696/698 U/D DECADE COUNTER/REGISTER 3-STATE |
| 中文描述： | HC697/699上/下4位二进制计数器/注册3态HC696/698上/下十进制计数器/寄存器三态 |
| 文件页数： | 1/22页 |
| 文件大小： | 429K |
| 代理商： | M74HC697C1R |
M54/74HC696/697
M54/74HC698/699
March 1993
HC697/699 U/D 4 BIT BINARY COUNTER/REGISTER (3-STATE)
HC696/698 U/D DECADE COUNTER/REGISTER (3-STATE)
B1R
(Plastic Package)
ORDER CODES :
M54HCXXXF1R
M74HCXXXM1R
M74HCXXXB1R
M74HCXXXC1R
F1R
(Ceramic Package)
M1R
(Micro Package)
C1R
(Chip Carrier)
PIN CONNECTIONS (top view)
NC =
No Internal
Connection
.
HIGH SPEED
fMAX = 50 MHz (TYP.) AT VCC =5 V
.
LOW POWER DISSIPATION
ICC =4
A (MAX.) AT TA =25 °C
.
HIGH NOISE IMMUNITY
VNIH =VNIL =28 % VCC (MIN.)
.
OUTPUT DRIVE CAPABILITY
15 LSTTL LOADS (for QA to QD)
10 LSTTL LOADS (for RCO)
.
SYMMETRICAL OUTPUT IMPEDANCE
|IOH|= IOL = 6 mA (MIN.) FOR QA TO QD
|IOH|= IOL = 4 mA (MIN.) FOR RCO OUTPUT
.
BALANCED PROPAGATION DELAYS
tPLH =tPHL
.
WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
.
PIN AND FUNCTION COMPATIBLE
WITH LSTTL 54/74LS696/697/698/699
DESCRIPTION
The HC696/697 are high speed CMOS up/down
counters fabricated with silicon gate C
2MOS
technology. They achieve the high speed operation
similar to equivalent LSTTL while maintaining the
CMOS low power dissipation. The HC696/698 are
BCD DECADE COUNTER, and the HC697/699 are
4-BIT BINARY COUNTER. Both devices have
register.
They count 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 CCK and register clock RCK
are positive-edge triggered. The counter clear
CCLR is active low and is synchronous for
HC698/699, and asynchronous for HC696/697.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
1/22
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