74AVC8T245
8-bit dual supply translating transceiver with configurable
voltage translation; 3-state
Rev. 02 — 28 April 2009
Product data sheet
1. General description
The 74AVC8T245 is an 8-bit, dual supply transceiver that enables bidirectional level
translation. It features two data input-output ports (An and Bn), a direction control input
(DIR), a output enable input (OE) and dual supply pins (V
CC(A)
and V
CC(B)
). Both V
CC(A)
and V
CC(B)
can be supplied at any voltage between 0.8 V and 3.6 V making the device
suitable for translating between any of the low voltage nodes (0.8 V, 1.2 V, 1.5 V, 1.8 V,
2.5 V and 3.3 V). Pins An, OE and DIR are referenced to V
CC(A)
and pins Bn are
referenced to V
CC(B)
. A HIGH on DIR allows transmission from An to Bn and a LOW on
DIR allows transmission from Bn to An. The output enable input (OE) can be used to
disable the outputs so the buses are effectively isolated.
The device is fully specified for partial power-down applications using I
OFF
. The I
OFF
circuitry disables the output, preventing any damaging backflow current through the
device when it is powered down. In suspend mode when either V
CC(A)
or V
CC(B)
are at
GND level, both An and Bn are in the high-impedance OFF-state.
2. Features
I
Wide supply voltage range:
N
V
CC(A)
: 0.8 V to 3.6 V
N
V
CC(B)
: 0.8 V to 3.6 V
I
Complies with JEDEC standards:
N
JESD8-12 (0.8 V to 1.3 V)
N
JESD8-11 (0.9 V to 1.65 V)
N
JESD8-7 (1.2 V to 1.95 V)
N
JESD8-5 (1.8 V to 2.7 V)
N
JESD8-B (2.7 V to 3.6 V)
I
ESD protection:
N
HBM JESD22-A114E Class 3B exceeds 8000 V
N
MM JESD22-A115-A exceeds 200 V
N
CDM JESD22-C101C exceeds 1000 V
I
Maximum data rates:
N
380 Mbit/s (≥ 1.8 V to 3.3 V translation)
N
260 Mbit/s (≥ 1.1 V to 3.3 V translation)
N
260 Mbit/s (≥ 1.1 V to 2.5 V translation)
N
210 Mbit/s (≥ 1.1 V to 1.8 V translation)
N
150 Mbit/s (≥ 1.1 V to 1.5 V translation)
N
100 Mbit/s (≥ 1.1 V to 1.2 V translation)
NXP Semiconductors
74AVC8T245
8-bit dual supply translating transceiver; 3-state
I
I
I
I
I
I
Suspend mode
Latch-up performance exceeds 100 mA per JESD 78 Class II
Inputs accept voltages up to 3.6 V
I
OFF
circuitry provides partial Power-down mode operation
Multiple package options
Specified from
−40 °C
to +85
°C
and
−40 °C
to +125
°C
3. Ordering information
Table 1.
Ordering information
Package
Temperature range Name
74AVC8T245PW
−40 °C
to +125
°C
74AVC8T245BQ
−40 °C
to +125
°C
TSSOP24
Description
plastic thin shrink small outline package; 24 leads;
body width 4.4 mm
Version
SOT355-1
SOT815-1
Type number
DHVQFN24 plastic dual in-line compatible thermal enhanced very
thin quad flat package; no leads; 24 terminals;
body 3.5
×
5.5
×
0.85 mm
4. Functional diagram
B1
21
V
CC(A)
V
CC(B)
B2
20
B3
19
B4
18
B5
17
B6
16
B7
15
B8
14
OE
22
DIR
2
3
A1
4
A2
5
A3
6
A4
7
A5
8
A6
9
A7
10
A8
001aai472
Fig 1.
Logic symbol
74AVC8T245_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 28 April 2009
2 of 23
NXP Semiconductors
74AVC8T245
8-bit dual supply translating transceiver; 3-state
DIR
OE
A1
B1
V
CC(A)
V
CC(B)
to other seven channels
001aai473
Fig 2.
Logic diagram (one channel)
5. Pinning information
5.1 Pinning
74AVC8T245
V
CC(A)
terminal 1
index area
24 V
CC(B)
23 V
CC(B)
22 OE
21 B1
20 B2
19 B3
18 B4
17 B5
16 B6
GND
(1)
GND 12
GND 13
15 B7
14 B8
74AVC8T245
DIR
V
CC(A)
DIR
A1
A2
A3
A4
A5
A6
A7
1
2
3
4
5
6
7
8
9
24 V
CC(B)
23 V
CC(B)
22 OE
21 B1
20 B2
19 B3
18 B4
17 B5
16 B6
15 B7
14 B8
13 GND
001aai489
2
3
4
5
6
7
8
9
A1
A2
A3
A4
A5
A6
A7
A8 10
GND 11
A8 10
GND 11
GND 12
1
001aai490
Transparent top view
(1) The die substrate is attached to this pad using
conductive die attach material. It cannot be used as a
supply pin or input.
Fig 3.
Pin configuration TSSOP24
Fig 4.
Pin configuration DHVQFN24
74AVC8T245_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 28 April 2009
3 of 23
NXP Semiconductors
74AVC8T245
8-bit dual supply translating transceiver; 3-state
5.2 Pin description
Table 2.
Symbol
V
CC(A)
DIR
A1 to A8
GND
[1]
GND
[1]
GND
[1]
B1 to B8
OE
V
CC(B)
V
CC(B)
[1]
Pin description
Pin
1
2
3, 4, 5, 6, 7, 8, 9, 10
11
12
13
22
23
24
Description
supply voltage A (An, OE and DIR inputs are referenced to V
CC(A)
)
direction control
data input or output
ground (0 V)
ground (0 V)
ground (0 V)
output enable input (active LOW)
supply voltage B (Bn inputs are referenced to V
CC(B)
)
supply voltage B (Bn inputs are referenced to V
CC(B)
)
21, 20, 19, 18, 17, 16, 15, 14 data input or output
All GND pins must be connected to ground (0 V).
6. Functional description
Table 3.
Function table
[1]
Input
OE
[2]
L
L
H
X
DIR
[2]
L
H
X
X
Input/output
[3]
An
[2]
An = Bn
input
Z
Z
Bn
input
Bn = An
Z
Z
Supply voltage
V
CC(A)
, V
CC(B)
0.8 V to 3.6 V
0.8 V to 3.6 V
0.8 V to 3.6 V
GND
[3]
[1]
[2]
[3]
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
The An, DIR and OE input circuit is referenced to V
CC(A)
; The Bn input circuit is referenced to V
CC(B)
.
If at least one of V
CC(A)
or V
CC(B)
is at GND level, the device goes into suspend mode.
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
CC(A)
V
CC(B)
I
IK
V
I
I
OK
V
O
I
O
I
CC
74AVC8T245_2
Parameter
supply voltage A
supply voltage B
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
Conditions
Min
−0.5
−0.5
Max
+4.6
+4.6
-
+4.6
-
V
CCO
+ 0.5
+4.6
±50
100
Unit
V
V
mA
V
mA
V
V
mA
mA
V
I
< 0 V
[1]
−50
−0.5
−50
[1][2][3]
[1]
V
O
< 0 V
Active mode
Suspend or 3-state mode
V
O
= 0 V to V
CC
I
CC(A)
or I
CC(B)
−0.5
−0.5
-
-
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 28 April 2009
4 of 23
NXP Semiconductors
74AVC8T245
8-bit dual supply translating transceiver; 3-state
Table 4.
Limiting values
…continued
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
I
GND
T
stg
P
tot
[1]
[2]
[3]
[4]
Parameter
ground current
storage temperature
total power dissipation
Conditions
Min
−100
−65
Max
-
+150
500
Unit
mA
°C
mW
T
amb
=
−40 °C
to +125
°C
[4]
-
The minimum input voltage ratings and output voltage ratings may be exceeded if the input and output current ratings are observed.
V
CCO
is the supply voltage associated with the output port.
V
CCO
+ 0.5 V should not exceed 4.6 V.
For TSSOP24 package: P
tot
derates linearly at 5.5 mW/K above 60
°C.
For DHVQFN24 package: P
tot
derates linearly at 4.5 mW/K above 60
°C.
8. Recommended operating conditions
Table 5.
Symbol
V
CC(A)
V
CC(B)
V
I
V
O
T
amb
∆t/∆V
[1]
[2]
Recommended operating conditions
Parameter
supply voltage A
supply voltage B
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CCI
= 0.8 V to 3.6 V
[2]
Conditions
Min
0.8
0.8
0
Max
3.6
3.6
3.6
V
CCO
3.6
+125
5
Unit
V
V
V
V
V
°C
ns/V
Active mode
Suspend or 3-state mode
[1]
0
0
−40
-
V
CCO
is the supply voltage associated with the output port.
V
CCI
is the supply voltage associated with the input port.
9. Static characteristics
Table 6.
Typical static characteristics at T
amb
= 25
°C
[1][2]
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
OH
V
OL
I
I
I
OZ
HIGH-level output voltage
LOW-level output voltage
input leakage current
OFF-state output current
Conditions
V
I
= V
IH
or V
IL
I
O
=
−1.5
mA; V
CC(A)
= V
CC(B)
= 0.8 V
V
I
= V
IH
or V
IL
I
O
= 1.5 mA; V
CC(A)
= V
CC(B)
= 0.8 V
DIR, OE input; V
I
= 0 V or 3.6 V;
V
CC(A)
= V
CC(B)
= 0.8 V to 3.6 V
A or B port; V
O
= 0 V or V
CCO
;
V
CC(A)
= V
CC(B)
= 3.6 V
suspend mode A port; V
O
= 0 V or V
CCO
;
V
CC(A)
= 3.6 V; V
CC(B)
= 0 V
suspend mode B port; V
O
= 0 V or V
CCO
;
V
CC(A)
= 0 V; V
CC(B)
= 3.6 V
[3]
Min
-
-
-
-
-
-
Typ
0.69
0.07
Max
-
-
Unit
V
V
±0.025 ±0.25 µA
±0.5
±0.5
±0.5
±2.5
±2.5
±2.5
µA
µA
µA
[3]
[3]
74AVC8T245_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 28 April 2009
5 of 23
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
