參數(shù)資料
型號(hào)： 74HC4060
廠商： NXP Semiconductors N.V.
元件分類(lèi)： 通用總線(xiàn)功能
英文描述： 14-stage binary ripple counter with oscillator
中文描述： 14級(jí)的振蕩器二進(jìn)制紋波計(jì)數(shù)器
文件頁(yè)數(shù)： 12/12頁(yè)
文件大?。?/td> 90K
代理商： 74HC4060
December 1990
12
Philips Semiconductors
Product specification
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 (Q
3
) propagation delays, the clock
pulse width, the output transition times and
the maximum clock frequency.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.13 Waveforms showing the master reset (MR)
pulse width, the master reset to output (Q
n
)
propagation delays and the master reset to
clock (RS) removal time.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
.
Fig.14 Waveforms showing the output (Q
n
) to Q
n
+
1
propagation delays.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
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