74LVC4245A
Octal dual supply translating transceiver; 3-state
Rev. 06 — 18 January 2008
Product data sheet
1. General description
The 74LVC4245A is an octal dual supply translating transceiver featuring non-inverting
3-state bus compatible outputs in both send and receive directions. It is designed to
interface between a 3 V and 5 V bus in a mixed 3 V and 5 V supply environment.
The device features an output enable input (pin OE) for easy cascading and a
send/receive input (pin DIR) for direction control. Pin OE controls the outputs so that the
buses are effectively isolated.
In suspend mode, when V
CCA
is zero, there will be no current flow from one supply to the
other supply. The A-outputs must be set 3-state and the voltage on the A-bus must be
smaller than V
diode
(typical 0.7 V).
V
CCA
≥
V
CCB
, except in suspend mode.
2. Features
I
5 V tolerant inputs/outputs, for interfacing with 5 V logic
I
Wide supply voltage range:
N
3 V port (V
CCB
): 1.5 V to 3.6 V
N
5 V port (V
CCA
): 1.5 V to 5.5 V
I
CMOS low-power consumption
I
Direct interface with TTL levels
I
Inputs accept voltages up to 5.5 V
I
High-impedance when V
CC
= 0 V
I
Complies with JEDEC standard no. JESD8B/JESD36
I
ESD protection:
N
HBM JESD22-A114E exceeds 2000 V
N
MM JESD22-A115-A exceeds 200 V
I
Multiple package options
I
Specified from
−40 °C
to +85
°C
and
−40 °C
to +125
°C
NXP Semiconductors
74LVC4245A
Octal dual supply translating transceiver; 3-state
3. Ordering information
Table 1.
Ordering information
Package
Temperature range
74LVC4245AD
74LVC4245ADB
74LVC4245APW
74LVC4245ABQ
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
−40 °C
to +125
°C
Name
SO24
SSOP24
TSSOP24
DHVQFN24
Description
plastic small outline package; 24 leads;
body width 7.5 mm
plastic shrink small outline package; 24 leads;
body width 5.3 mm
Version
SOT137-1
SOT340-1
Type number
plastic thin shrink small outline package; 24 leads; SOT355-1
body width 4.4 mm
plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 24
terminals; body 3.5
×
5.5
×
0.85 mm
SOT815-1
4. Functional diagram
2
DIR
OE
22
3
A0
B0
21
4
22
2
G3
3EN1
3EN2
5
A1
B1
A2
B2
19
20
1
3
4
5
6
7
8
9
10
mna452
6
2
21
20
19
8
18
17
16
15
14
10
9
7
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
14
15
16
17
18
mna453
Fig 1.
IEC Logic symbol
Fig 2.
Logic diagram
74LVC4245A_6
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 18 January 2008
2 of 17
NXP Semiconductors
74LVC4245A
Octal dual supply translating transceiver; 3-state
5. Pinning information
5.1 Pinning
74LVC4245A
V
CCA
terminal 1
index area
24 V
CCB
23 V
CCB
22 OE
21 B0
20 B1
19 B2
18 B3
17 B4
16 B5
GND
(1)
GND 12
GND 13
15 B6
14 B7
74LVC4245A
DIR
V
CCA
DIR
A0
A1
A2
A3
A4
A5
A6
1
2
3
4
5
6
7
8
9
24 V
CCB
23 V
CCB
22 OE
21 B0
20 B1
19 B2
18 B3
17 B4
16 B5
15 B6
14 B7
13 GND
001aaa349
2
3
4
5
6
7
8
9
A0
A1
A2
A3
A4
A5
A6
A7 10
GND 11
A7 10
GND 11
GND 12
1
001aah087
Transparent top view
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as a
supply pin or input.
Fig 3.
Pin configuration SO24 and (T)SSOP24
Fig 4.
Pin configuration DHVQFN24
5.2 Pin description
Table 2.
Symbol
V
CCA
V
CCB
GND
DIR
A[0:7]
B[0:7]
OE
Pin description
Pin
1
23, 24
11, 12, 13
2
3, 4, 5, 6, 7, 8, 9, 10
21, 20, 19, 18, 17, 16, 15, 14
22
Description
supply voltage (5 V bus)
supply voltage (3 V bus)
ground (0 V)
direction control
data input or output
data input or output
output enable input (active LOW)
74LVC4245A_6
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 18 January 2008
3 of 17
NXP Semiconductors
74LVC4245A
Octal dual supply translating transceiver; 3-state
6. Functional description
Table 3.
Input
OE
L
L
H
[1]
Functional table
[1]
Input/output
DIR
L
H
X
An
A=B
input
Z
Bn
input
B=A
Z
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
7. Limiting values
Table 4.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
V
CCA
V
CCB
I
IK
V
I
I
OK
V
O
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
Parameter
supply voltage 5 V port
supply voltage 3 V port
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
storage temperature
power dissipation
Conditions
Min
−0.5
−0.5
Max
+6.5
+4.6
-
+6.5
±50
V
CC
+ 0.5
+6.5
±50
100
-
+150
500
Unit
V
V
mA
V
mA
V
V
mA
mA
mA
°C
mW
V
I
< 0 V
[1]
−50
−0.5
-
[1]
[1]
V
O
> V
CC
or V
O
< 0 V
output HIGH or LOW state
output 3-state
V
O
= 0 V to V
CC
−0.5
−0.5
-
-
−100
−65
T
amb
=
−40 °C
to +125
°C
[2]
-
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SO24 packages: above 70
°C
the value of P
tot
derates linearly with 8 mW/K.
For (T)SSOP24 packages: above 60
°C
the value of P
tot
derates linearly with 5.5 mW/K.
For DHVQFN24 packages: above 60
°C
the value of P
tot
derates linearly with 4.5 mW/K.
8. Recommended operating conditions
Table 5.
Symbol
V
CCA
V
CCB
V
I
V
O
T
amb
74LVC4245A_6
Recommended operating conditions
Parameter
supply voltage 5 V port (for maximum
speed performance)
Conditions
V
CCA
≥
V
CCB
; see
Figure 5
Min
1.5
1.5
0
0
0
−40
Typ
-
-
-
-
-
-
Max
5.5
3.6
5.5
V
CC
5.5
+125
Unit
V
V
V
V
V
°C
supply voltage 3 V port (for low-voltage V
CCA
≥
V
CCB
; see
Figure 5
applications)
input voltage
output voltage
ambient temperature
for control inputs
output HIGH or LOW state
output 3-state
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 18 January 2008
4 of 17
NXP Semiconductors
74LVC4245A
Octal dual supply translating transceiver; 3-state
Table 5.
Symbol
∆t/∆V
Recommended operating conditions
…continued
Parameter
input transition rise and fall rate
Conditions
V
CCB
= 2.7 V to 3.0 V
V
CCB
= 3.0 V to 3.6 V
V
CCA
= 3.0 V to 4.5 V
V
CCA
= 4.5 V to 5.5 V
Min
-
-
-
-
Typ
-
-
-
-
Max
20
10
20
10
Unit
ns/V
ns/V
ns/V
ns/V
9. Static characteristics
Table 6.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol
V
IH
V
IL
V
OH
Parameter
HIGH-level input voltage
LOW-level input voltage
Conditions
V
CCB
= 2.7 V to 3.6 V
V
CCA
= 4.5 V to 5.5 V
V
CCB
= 2.7 V to 3.6 V
V
CCA
= 4.5 V to 5.5 V
HIGH-level output voltage V
I
= V
IH
or V
IL
V
CCB
= 2.7 V to 3.6 V; I
O
=
−100 µA
V
CCB
= 2.7 V; I
O
=
−12
mA
V
CCB
= 3.0 V; I
O
=
−24
mA
V
CCA
= 4.5 V to 5.5 V; I
O
=
−100 µA
V
CCA
= 4.5 V; I
O
=
−12
mA
V
CCA
= 4.5 V; I
O
=
−24
mA
V
OL
LOW-level output voltage
V
I
= V
IH
or V
IL
V
CCB
= 2.7 V to 3.6 V; I
O
= 100
µA
V
CCB
= 2.7 V; I
O
= 12 mA
V
CCB
= 3.0 V; I
O
= 24 mA
V
CCA
= 4.5 V to 5.5 V; I
O
= 100
µA
V
CCA
= 4.5 V; I
O
= 12 mA
V
CCA
= 4.5 V; I
O
= 24 mA
I
I
I
OZ
input leakage current
OFF-state output current
V
I
= 5.5 V or GND
V
I
= V
IH
or V
IL
V
CCB
= 3.6 V; V
O
= V
CCB
or GND
V
CCA
= 5.5 V; V
O
= V
CCA
or GND
I
CC
supply current
I
O
= 0 A
V
CCB
= 3.6 V;
other inputs at V
CCB
or GND
V
CCA
= 5.5 V;
other inputs at V
CCA
or GND
-
-
0.1
0.1
10
10
µA
µA
[2]
Min
2.0
2.0
-
-
V
CCB
−
0.2
V
CCB
−
0.5
V
CCB
−
0.8
V
CCA
−
0.2
V
CCA
−
0.5
V
CCA
−
0.8
-
-
-
-
-
-
-
-
-
Typ
[1]
-
-
-
-
V
CCB
-
-
V
CCA
-
-
-
-
-
-
-
-
±0.1
±0.1
±0.1
Max
-
-
0.8
0.8
-
-
-
-
-
-
0.20
0.40
0.55
0.20
0.40
0.55
±5
±5
±5
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
µA
µA
µA
T
amb
=
−40 °C
to +85
°C
74LVC4245A_6
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 06 — 18 January 2008
5 of 17
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