參數(shù)資料
型號(hào): 74LVC4245A
廠商: NXP Semiconductors N.V.
元件分類: 模擬專用變換器
英文描述: 3-state,Octal dual supply translating transceiver
中文描述: 3態(tài),八路雙電源轉(zhuǎn)換收發(fā)器
文件頁(yè)數(shù): 7/16頁(yè)
文件大小: 90K
代理商: 74LVC4245A
1999 Jun 15
7
Philips Semiconductors
Product specification
Octal dual supply translating transceiver; 3-state
74LVC4245A
AC CHARACTERISTICS
GND = 0 V; t
r
= t
f
2.5 ns; C
L
= 50 pF; T
amb
=
40 to 85
°
C.
Notes
1.
2.
Typical values are measured at V
CCA
= 5.0 V and V
CCB
= 3.3 V and T
amb
= 25
°
C.
Typical values are measured at V
CCA
= 5.0 V and T
amb
= 25
°
C.
SYMBOL
PARAMETER
WAVEFORMS
LIMITS
UNIT
V
CCA
= 5 V
±
0.5 V
V
CCB
= 3.3 V
±
0.3 V
V
CCB
= 2.7 V
MIN.
TYP.
(1)
MAX.
MIN.
TYP.
(2)
MAX.
t
PHL
/t
PLH
propagation delay
A
n
to B
n
propagation delay
B
n
to A
n
3-state output enable
time OE to A
n
3-state output enable
time OE to B
n
3-state output disable
time OE to A
n
3-state output disable
time OE to B
n
see Figs 4 and 7
1.5
4.0
6.5
1.5
4.5
7.0
ns
see Figs 4 and 7
1.5
4.0
6.5
1.5
4.5
7.0
ns
t
PZH
/t
PZL
see Figs 6 and 7
1.5
6.2
10
1.5
7.0
11.0
ns
see Figs 6 and 7
1.5
5.0
8.1
1.5
5.7
8.7
ns
t
PHZ
/t
PLZ
see Figs 6 and 7
1.5
5.3
7.5
1.5
5.7
8.0
ns
see Figs 6 and 7
1.5
5.8
7.8
1.5
6.2
8.5
ns
AC WAVEFORMS
Fig.4
The input (A
n
, B
n
) to output (B
n
, A
n
)
propagation delays.
handbook, halfpage
MNA366
An, Bn
INPUT
Bn, An
OUTPUT
tPHL
tPLH
GND
VI
VM
VM
VOH
VOL
V
M
= 1.5 V at 2.7 V
V
CCB
3.6 V;
V
M
= 0.5V
CCA
at V
CCA
4.5 V;
V
and V
are typical output voltage drop that occur
with the output load.
Fig.5 Supply operation area.
handbook, halfpage
(V)
1.5
2.7
5.7
Complies with TTL levels
0.9
MNA454
3.9
2.1
4.5
5.1
3.3
1.5
2.1
2.7
3.3
3.6
1.2
1.8
2.4
3.0
VCCA (V)
VCCB
Full operation
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