參數(shù)資料
型號(hào): 74LV377PWDH
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: Octal D-type flip-flop with data enable; positive edge-trigger
中文描述: LV/LV-A/LVX/H SERIES, POSITIVE EDGE TRIGGERED D FLIP-FLOP, TRUE OUTPUT, PDSO20
封裝: PLASTIC, TSSOP-20
文件頁(yè)數(shù): 7/12頁(yè)
文件大?。?/td> 114K
代理商: 74LV377PWDH
Philips Semiconductors
Product specification
74LV377
Octal D-type flip-flop with data enable;
positive edge-trigger
1998 Jun 10
7
AC WAVEFORMS
V
M
= 1.5V at V
CC
V
M
= 0.5V * V
CC
at V
CC
V
and V
OH
are the typical output voltage drop that occur with the
output load.
2.7V
2.7V
SV00707
VM
CP INPUT
V
OL
GND
V
OH
V
CC
Q
n
OUTPUT
V
M
t
PLH
t
PHL
t
W
1/f
max
Figure 1. Clock (CP) to output (Q
n
) propagation delays,
the clock pulse width and the maximum clock pulse frequency.
ééééééééééééé
ééééééééééééé
ééééééééééééé
GND
t
h
ééééééééééééé
ééééééééééééé
ééééééééééééé
t
h
E INPUT
CP INPUT
D
n
INPUT
GND
GND
V
M
V
CC
V
CC
V
CC
V
M
tW
t
h
SV00671
NOTE:
The shaded areas indicate when the input is permitted
to change for predictable output performance.
Figure 2. Data set-up and hold times from the data input (Dn)
and from the enable input (E) to the clock (CP).
TEST CIRCUIT
PULSE
GENERATOR
R
T
V
I
D.U.T.
V
O
C
L
R
L
= 1k
V
CC
Test Circuit for switching times
DEFINITIONS
R
L
= Load resistor
C
L
= Load capacitance includes jig and probe capacitance
V
CC
V
I
< 2.7V
V
CC
TEST
t
PLH/
t
PHL
R
T
= Termination resistance should be equal to Z
OUT
of pulse generators.
50pF
SV00901
2.7–3.6V
2.7V
Figure 3. Load circuitry for switching times
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