參數(shù)資料
型號: 74LVC2245A
廠商: NXP Semiconductors N.V.
英文描述: Octal transceiver with direction pin;with 30Ω series termination resistors; with 5-volt tolerant inputs/outputs (3-State)(帶30Ω系列終端電阻器,5V輸入/輸出容限的八收發(fā)器(三態(tài)))
中文描述: 八路收發(fā)器的方向,針;與30Ω串聯(lián)終端電阻,與5伏容限輸入/輸出(3國)(帶30Ω系列終端電阻器,5V的輸入/輸出容限的八收發(fā)器(三態(tài)))
文件頁數(shù): 8/16頁
文件大?。?/td> 87K
代理商: 74LVC2245A
1999 Jun 15
8
Philips Semiconductors
Product specification
Octal transceiver with direction pin; 30
series
termination resistors; 5 V input/output tolerant; 3-state
74LVC2245A
Fig.5 The 3-state enable and disable times.
handbook, full pagewidth
MNA367
tPLZ
tPHZ
outputs
disabled
outputs
enabled
VY
VX
outputs
enabled
OUTPUT
LOW-to-OFF
OFF-to-LOW
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
OE INPUT
VI
VOL
VOH
VCC
VM
GND
GND
tPZL
tPZH
VM
VM
V
M
= 1.5 V at V
CC
2.7 V;
V
M
= 0.5V
CC
at V
CC
< 2.7 V;
V
X
= V
OL
+ 0.3 V at V
CC
2.7 V;
V
X
= V
OL
+ 0.1 V at V
CC
< 2.7 V;
V
Y
= V
OH
0.3 V at V
CC
2.7 V;
V
Y
= V
OH
0.1 V at V
CC
< 2.7 V;
V
OL
and V
OH
are typical output voltage drop that occur with the output load.
Fig.6 Load circuitry for switching times.
Definitions for test circuit:
R
L
= Load resistor; see Chapter “AC characteristics”.
C
= Load capacitance including jig and probe capacitance (see
Chapter “AC characteristics”).
R
= Termination resistance should be equal to the output
Impedance Z
0
of the pulse generator.
TEST
S
1
t
PLH
/t
PHL
t
PLZ
/t
PZL
t
PHZ
/t
PZH
open
2
×
V
CC
GND
V
CC
V
I
<2.7 V
2.7 to 3.6 V
V
CC
2.7 V
handbook, full pagewidth
open
GND
50 pF
2
×
VCC
VCC
VI
VO
MNA368
D.U.T.
CL
RT
RL
500
RL
500
PULSE
GENERATOR
S1
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