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参数资料
| 型号： | 74HCT4060PW |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 计数器 |
| 英文描述： | 14-stage binary ripple counter with oscillator |
| 中文描述： | HCT SERIES, ASYN NEGATIVE EDGE TRIGGERED 14-BIT UP BINARY COUNTER, PDSO16 |
| 文件页数： | 4/12页 |
| 文件大小： | 90K |
| 代理商： | 74HCT4060PW |
December 1990
12
Philips Semiconductors
Product specication
14-stage binary ripple counter with oscillator
74HC/HCT4060
Fig.11 External components connection for a crystal oscillator.
TYPICAL CRYSTAL OSCILLATOR
In Fig.11, R2 is the power limiting resistor.
For starting and maintaining oscillation a minimum
transconductance is necessary, so R2 should not
be too large. A practical value for R2 is 2.2 k
.
AC WAVEFORMS
Fig.12 Waveforms showing the clock (RS) to
output (Q3) propagation delays, the clock
pulse width, the output transition times and
the maximum clock frequency.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.13 Waveforms showing the master reset (MR)
pulse width, the master reset to output (Qn)
propagation delays and the master reset to
clock (RS) removal time.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”.
Fig.14 Waveforms showing the output (Qn) to Qn+1 propagation delays.
(1) HC : VM = 50%; VI = GND to VCC.
HCT: VM = 1.3 V; VI = GND to 3 V.
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