參數(shù)資料
型號: 74LV161
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Presettable synchronous 4-bit binary counter; asynchronous reset
中文描述: 可預(yù)置同步4位二進制計數(shù)器;異步復(fù)位
文件頁數(shù): 10/16頁
文件大?。?/td> 148K
代理商: 74LV161
Philips Semiconductors
Presettable synchronous 4-bit binary counter;
asynchronous reset
Product specification
74LV161
1997 May 15
10
SV00580
V
M
CEP, CET
INPUT
CP INPUT
V
M
t
h
t
su
t
su
t
h
GND
GND
V
I
V
I
The shaded areas indicate when the input is permitted to change
for predictable output performance.
Figure 5. CEP and CET set-up and hold times.
TEST CIRCUIT
SWITCH POSITION
PULSE
GENERATOR
R
T
V
I
D.U.T.
V
O
C
L
R
L
V
CC
R
L
Test Circuit for switching times
Open
GND
S
1
DEFINITIONS
V
CC
V
I
< 2.7V
V
CC
TEST
S
1
t
PLH/
t
PHL
t
PLZ/
t
PZL
Open
R
L
= Load resistor; see AC CHARACTERISTICS for value.
C
= Load capacitance includes jig and probe capacitance:
See AC CHARACTERISTICS for value.
R
= Termination resistance should be equal to Z
OUT
of
pulse generators.
2 x V
CC
2 x V
CC
2.7V
2.7–3.6V
t
PHZ/
t
PZH
GND
SV00776
Figure 6. Load circuitry for switching times.
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