74AVCH1T45
Dual supply translating transceiver; 3-state
Rev. 02 — 5 May 2009
Product data sheet
1. General description
The 74AVCH1T45 is a single bit, dual supply transceiver that enables bidirectional level
translation. It features two data input-output ports (A and B), a direction control input (DIR)
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 A and DIR are
referenced to V
CC(A)
and pin B is referenced to V
CC(B)
. A HIGH on DIR allows transmission
from A to B and a LOW on DIR allows transmission from B to A.
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 A and B are in the high-impedance OFF-state.
The 74AVCH1T45 has active bus hold circuitry which is provided to hold unused or
floating data inputs at a valid logic level. This feature eliminates the need for external
pull-up or pull-down resistors.
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
High noise immunity
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
500 Mbit/s (1.8 V to 3.3 V translation)
N
320 Mbit/s (< 1.8 V to 3.3 V translation)
N
320 Mbit/s (translate to 2.5 V or 1.8 V)
N
280 Mbit/s (translate to 1.5 V)
NXP Semiconductors
74AVCH1T45
Dual supply translating transceiver; 3-state
I
I
I
I
I
I
I
I
N
240 Mbit/s (translate to 1.2 V)
Suspend mode
Bus hold on data inputs
Latch-up performance exceeds 100 mA per JESD 78 Class II
Inputs accept voltages up to 3.6 V
Low noise overshoot and undershoot < 10 % of V
CC
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
74AVCH1T45GW
74AVCH1T45GM
−40 °C
to +125
°C
−40 °C
to +125
°C
SC-88
XSON6
Description
plastic surface-mounted package; 6 leads
Version
SOT363
Type number
plastic extremely thin small outline package; no leads; SOT886
6 terminals; body 1
×
1.45
×
0.5 mm
4. Marking
Table 2.
Marking
Marking code
[1]
K5
K5
Type number
74AVCH1T45GW
74AVCH1T45GM
[1]
The pin 1 indicator is located on the lower left corner of the device, below the marking code.
5. Functional diagram
DIR
5
DIR
3
A
4
V
CC(A)
V
CC(B)
V
CC(A)
001aag885
A
B
B
V
CC(B)
001aag886
Fig 1.
Logic symbol
Fig 2.
Logic diagram
74AVCH1T45_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 5 May 2009
2 of 22
NXP Semiconductors
74AVCH1T45
Dual supply translating transceiver; 3-state
6. Pinning information
6.1 Pinning
74AVCH1T45
74AVCH1T45
V
CC(A)
GND
1
2
6
5
V
CC(B)
DIR
A
A
3
001aag887
V
CC(A)
1
6
V
CC(B)
GND
2
5
DIR
3
4
B
4
B
001aag888
Transparent top view
Fig 3.
Pin configuration SOT363
Fig 4.
Pin configuration SOT886
6.2 Pin description
Table 3.
Symbol
V
CC(A)
GND
A
B
DIR
V
CC(B)
Pin description
Pin
1
2
3
4
5
6
Description
supply voltage port A and DIR
ground (0 V)
data input or output
data input or output
direction control
supply voltage port B
7. Functional description
Table 4.
Function table
[1]
Input
DIR
[3]
L
H
X
Input/output
[2]
A
A=B
input
Z
B
input
B=A
Z
Supply voltage
V
CC(A)
, V
CC(B)
0.8 V to 3.6 V
0.8 V to 3.6 V
GND
[4]
[1]
[2]
[3]
[4]
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
The input circuit of the data I/O is always active.
The DIR input circuit is referenced to V
CC(A)
.
If at least one of V
CC(A)
or V
CC(B)
is at GND level, the device goes into Suspend mode.
74AVCH1T45_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 5 May 2009
3 of 22
NXP Semiconductors
74AVCH1T45
Dual supply translating transceiver; 3-state
8. Limiting values
Table 5.
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
I
GND
T
stg
P
tot
[1]
[2]
[3]
[4]
Parameter
supply voltage A
supply voltage B
input clamping current
input voltage
output clamping current
output voltage
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
Min
−0.5
−0.5
Max
+4.6
+4.6
-
+4.6
-
V
CCO
+ 0.5
+4.6
±50
100
-
+150
250
Unit
V
V
mA
V
mA
V
V
mA
mA
mA
°C
mW
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
CCO
I
CC(A)
or I
CC(B)
−0.5
−0.5
-
-
−100
−65
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 SC-88 packages: above 87.5
°C
the value of P
tot
derates linearly with 4.0 mW/K.
For XSON6 packages: above 118
°C
the value of P
tot
derates linearly with 7.8 mW/K.
9. Recommended operating conditions
Table 6.
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.
74AVCH1T45_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 5 May 2009
4 of 22
NXP Semiconductors
74AVCH1T45
Dual supply translating transceiver; 3-state
10. Static characteristics
Table 7.
Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
T
amb
= 25
°C
V
OH
V
OL
I
I
I
BHL
I
BHH
I
BHLO
I
BHHO
I
OZ
I
OFF
HIGH-level output
voltage
LOW-level output
voltage
input leakage
current
bus hold LOW
current
bus hold HIGH
current
bus hold LOW
overdrive current
bus hold HIGH
overdrive current
OFF-state output
current
power-off leakage
current
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 input; V
I
= 0 V to 3.6 V;
V
CC(A)
= V
CC(B)
= 0.8 V to 3.6 V
A or B port;
V
I
= 0.42 V; V
CC(A)
= V
CC(B)
= 1.2 V
A or B port;
V
I
= 0.78 V; V
CC(A)
= V
CC(B)
= 1.2 V
A or B port; V
CC(A)
= V
CC(B)
= 1.2 V
A or B port; V
CC(A)
= V
CC(B)
= 1.2 V
A or B port; V
O
= 0 V or V
CCO
;
V
CC(A)
= V
CC(B)
= 0.8 V to 3.6 V
A port; V
I
or V
O
= 0 V to 3.6 V;
V
CC(A)
= 0 V; V
CC(B)
= 0.8 V to 3.6 V
B port; V
I
or V
O
= 0 V to 3.6 V;
V
CC(B)
= 0 V; V
CC(A)
= 0.8 V to 3.6 V
C
I
C
I/O
input capacitance
input/output
capacitance
DIR input; V
I
= 0 V or 3.3 V;
V
CC(A)
= V
CC(B)
= 3.3 V
A and B port; suspend mode;
V
O
= 3.3 V or 0 V;
V
CC(A)
= V
CC(B)
= 3.3 V
data input
V
CCI
= 0.8 V
V
CCI
= 1.1 V to 1.95 V
V
CCI
= 2.3 V to 2.7 V
V
CCI
= 3.0 V to 3.6 V
DIR input
V
CCI
= 0.8 V
V
CCI
= 1.1 V to 1.95 V
V
CCI
= 2.3 V to 2.7 V
V
CCI
= 3.0 V to 3.6 V
0.7V
CC(A)
0.65V
CC(A)
1.6
2
-
-
-
-
-
-
-
-
V
V
V
V
[3]
[1]
Conditions
Min
Typ
Max
Unit
-
-
-
-
-
-
-
-
-
-
-
-
0.69
0.07
±0.025
26
−24
28
−26
±0.5
±0.1
±0.1
1
4
-
-
±0.25
-
-
-
-
±2.5
±1
±1
-
-
V
V
µA
µA
µA
µA
µA
µA
µA
µA
pF
pF
[1]
[2]
T
amb
=
−40 °C
to +85
°C
V
IH
HIGH-level input
voltage
0.7V
CCI
0.65V
CCI
1.6
2
-
-
-
-
-
-
-
-
V
V
V
V
74AVCH1T45_2
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 5 May 2009
5 of 22
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