74LVC2T45; 74LVCH2T45
Dual supply translating transceiver; 3-state
Rev. 03 — 19 January 2010
Product data sheet
1. General description
The 74LVC2T45; 74LVCH2T45 are dual bit, dual supply translating transceivers with
3-state outputs that enable bidirectional level translation. They feature two data
input-output ports (nA and nB), 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 1.2 V and
5.5 V making the device suitable for translating between any of the low voltage nodes
(1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V and 5.0 V). Pins nA and DIR are referenced to V
CC(A)
and
pins nB are referenced to V
CC(B)
. A HIGH on DIR allows transmission from nA to nB and a
LOW on DIR allows transmission from nB to nA.
The devices are 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 port and B port are in the high-impedance OFF-state.
Active bus hold circuitry in the 74LVCH2T45 holds unused or floating data inputs at a valid
logic level.
2. Features
Wide supply voltage range:
V
CC(A)
: 1.2 V to 5.5 V
V
CC(B)
: 1.2 V to 5.5 V
High noise immunity
Complies with JEDEC standards:
JESD8-7 (1.2 V to 1.95 V)
JESD8-5 (1.8 V to 2.7 V)
JESD8C (2.7 V to 3.6 V)
JESD36 (4.5 V to 5.5 V)
ESD protection:
HBM JESD22-A114E Class 3A exceeds 4000 V
MM JESD22-A115-A exceeds 200 V
CDM JESD22-C101C exceeds 1000 V
Maximum data rates:
420 Mbps (3.3 V to 5.0 V translation)
210 Mbps (translate to 3.3 V))
140 Mbps (translate to 2.5 V)
75 Mbps (translate to 1.8 V)
60 Mbps (translate to 1.5 V)
NXP Semiconductors
74LVC2T45; 74LVCH2T45
Dual supply translating transceiver; 3-state
Suspend mode
Latch-up performance exceeds 100 mA per JESD 78 Class II
±24
mA output drive (V
CC
= 3.0 V)
Inputs accept voltages up to 5.5 V
Low power consumption: 16
μA
maximum I
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
74LVC2T45DC
74LVCH2T45DC
74LVC2T45GT
74LVCH2T45GT
74LVC2T45GD
74LVCH2T45GD
74LVC2T45GM
74LVCH2T45GM
−40 °C
to +125
°C
XQFN8U
−40 °C
to +125
°C
XSON8U
−40 °C
to +125
°C
XSON8
−40 °C
to +125
°C
Name
VSSOP8
Description
Version
plastic very thin shrink small outline package; 8 leads; SOT765-1
body width 2.3 mm
plastic extremely thin small outline package; no leads; SOT833-1
8 terminals; body 1
×
1.95
×
0.5 mm
plastic extremely thin small outline package; no leads; SOT996-2
8 terminals; UTLP based; body 3
×
2
×
0.5 mm
plastic extremely thin quad flat package; no leads;
8 terminals; UTLP based; body 1.6
×
1.6
×
0.5 mm
SOT902-1
Type number
4. Marking
Table 2.
Marking
Marking code
V45
X45
V45
X45
V45
X45
V45
X45
Type number
74LVC2T45DC
74LVCH2T45DC
74LVC2T45GT
74LVCH2T45GT
74LVC2T45GD
74LVCH2T45GD
74LVC2T45GM
74LVCH2T45GM
74LVC_LVCH2T45_3
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 19 January 2010
2 of 32
NXP Semiconductors
74LVC2T45; 74LVCH2T45
Dual supply translating transceiver; 3-state
5. Functional diagram
DIR
5
DIR
1A
2
1A
7
1B
1B
2A
3
2A
6
V
CC(A)
V
CC(B)
V
CC(A)
001aag577
2B
2B
V
CC(B)
001aag578
Fig 1.
Logic symbol
Fig 2.
Logic diagram
6. Pinning information
6.1 Pinning
74LVC2T45
74LVCH2T45
V
CC(A)
1
8
V
CC(B)
1A
2
7
1B
74LVC2T45
74LVCH2T45
2A
V
CC(A)
1A
2A
GND
1
2
3
4
001aai904
3
6
2B
8
7
6
5
V
CC(B)
1B
2B
DIR
GND
4
5
DIR
001aai905
Transparent top view
Fig 3.
Pin configuration SOT765-1 (VSSOP8)
Fig 4.
Pin configuration SOT833-1 (XSON8)
74LVC_LVCH2T45_3
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 19 January 2010
3 of 32
NXP Semiconductors
74LVC2T45; 74LVCH2T45
Dual supply translating transceiver; 3-state
74LVC2T45
74LVCH2T45
terminal 1
index area
V
CC(B)
1
8
74LVC2T45
74LVCH2T45
V
CC(A)
1A
2A
GND
1
2
3
4
8
7
6
5
V
CC(B)
1B
7
V
CC(A)
2B
1B
2B
DIR
DIR
2
6
1A
3
4
5
2A
GND
001aai906
001aaj617
Transparent top view
Transparent top view
Fig 5.
Pin configuration SOT996-2 (XSON8U)
Fig 6.
Pin configuration SOT902-1 (XQFN8U)
6.2 Pin description
Table 3.
Symbol
Pin description
Pin
SOT765-1, SOT833-1
and SOT996-2
V
CC(A)
1A
2A
GND
DIR
2B
1B
V
CC(B)
1
2
3
4
5
6
7
8
SOT902-1
7
6
5
4
3
2
1
8
supply voltage A (port A and DIR)
data input or output
data input or output
ground (0 V)
direction control
data input or output
data input or output
supply voltage B (port B)
Description
7. Functional description
Table 4.
Function table
[1]
Input
DIR
L
H
X
Input/output
[2]
nA
nA = nB
input
Z
nB
input
nB = nA
Z
Supply voltage
V
CC(A)
, V
CC(B)
1.2 V to 5.5 V
1.2 V to 5.5 V
GND
[3]
[1]
[2]
[3]
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.
When either V
CC(A)
or V
CC(B)
is at GND level, the device goes into suspend mode.
74LVC_LVCH2T45_3
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 19 January 2010
4 of 32
NXP Semiconductors
74LVC2T45; 74LVCH2T45
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
+6.5
+6.5
-
+6.5
-
V
CCO
+ 0.5
+6.5
±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]
[2]
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 6.5 V.
For VSSOP8 packages: above 110
°C
the value of P
tot
derates linearly with 8.0 mW/K.
For XSON8, XSON8U and XQFN8U packages: above 45
°C
the value of P
tot
derates linearly with 2.4 mW/K.
9. Recommended operating conditions
Table 6.
Symbol
V
CC(A)
V
CC(B)
V
I
V
O
T
amb
Δt/ΔV
Recommended operating conditions
Parameter
supply voltage A
supply voltage B
input voltage
output voltage
ambient temperature
input transition rise and fall rate
V
CCI
= 1.2 V
V
CCI
= 1.4 V to 1.95 V
V
CCI
= 2.3 V to 2.7 V
V
CCI
= 3 V to 3.6 V
V
CCI
= 4.5 V to 5.5 V
[1]
[2]
V
CCO
is the supply voltage associated with the output port.
V
CCI
is the supply voltage associated with the input port.
[2]
Conditions
Min
1.2
1.2
0
Max
5.5
5.5
5.5
V
CCO
5.5
+125
20
20
20
10
5
Unit
V
V
V
V
V
°C
ns/V
ns/V
ns/V
ns/V
ns/V
Active mode
Suspend or 3-state mode
[1]
0
0
−40
-
-
-
-
-
74LVC_LVCH2T45_3
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 03 — 19 January 2010
5 of 32
京公网安备 11010802033920号
EEWORLD
