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FEATURES
DESCRIPTION/ORDERING INFORMATION
DGG OR DGV PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1DIR
1B1
1B2
GND
1B3
1B4
V
CCB
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
V
CCB
2B5
2B6
GND
2B7
2B8
2DIR
1OE
1A1
1A2
GND
1A3
1A4
V
CCA
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CCA
2A5
2A6
GND
2A7
2A8
2OE
SN74LVCH16T245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES635A JULY 2005 REVISED AUGUST 2005
Control Inputs V
IH
/V
IL
Levels Are Referenced
to V
CCA
Voltage
V
CC
Isolation Feature If Either V
CC
Input Is at
GND, All Outputs Are in the High-Impedance
State
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.65-V to
5.5-V Power-Supply Range
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
I
off
Supports Partial-Power-Down Mode
Operation
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
200-V Machine Model (A115-A)
1000-V Charged-Device Model (C101)
This 16-bit noninverting bus transceiver uses two
separate configurable power-supply rails. The A port
is designed to track V
CCA
. V
CCA
accepts any supply
voltage from 1.65 V to 5.5 V. The B port is designed
to track V
CCB
. V
CCB
accepts any supply voltage from
1.65 V to 5.5 V. This allows for universal low-voltage
bidirectional translation between any of the 1.8-V,
2.5-V, 3.3-V, and 5-V voltage nodes.
The SN74LVCH16T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by V
CCA
.
The SN74LVCH16T245 is designed for asynchronous communication between two data buses. The logic levels
of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs or the
A-port outputs or place both output ports into the high-impedance mode. The device transmits data from the A
bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs
are activated. The input circuitry on both A and B ports is always active and must have a logic HIGH or LOW
level applied to prevent excess I
CC
and I
CCZ
.
ORDERING INFORMATION
T
A
PACKAGE
(1)
ORDERABLE PART NUMBER
TOP-SIDE MARKING
TSSOP DGG
Tape and reel
SN74LVCH16T245DGGR
LVCH16T245
TVSOP DGV
Tape and reel
SN74LVCH16T245DGVR
LDHT245
40
C to 85
C
VFBGA GQL
Tape and reel
SN74LVCH16T245GQLR
LDHT245
VFBGA ZQL (Pb-free)
Tape and reel
SN74LVCH16T245ZQLR
(1)
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Copyright 2005, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
GQL OR ZQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
2
1
3
4
6
5
K
SN74LVCH16T245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES635A JULY 2005 REVISED AUGUST 2005
Active bus-hold circuitry holds unused or undriven data inputs at a valid logic state. Use of pullup or pulldown
resistors with the bus-hold circuitry is not recommended.
This device is fully specified for partial-power-down applications using I
off
. The I
off
circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
The V
CC
isolation feature ensures that if either V
CC
input is at GND, then all outputs are in the high-impedance
state. The bus-hold circuitry on the powered-up side always stays active.
To ensure the high-impedance state during power up or power down, OE should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
TERMINAL ASSIGNMENTS
(1)
1
2
3
4
5
6
A
1DIR
NC
NC
NC
NC
1OE
B
1B2
1B1
GND
GND
1A1
1A2
C
1B4
1B3
V
CCB
V
CCA
1A3
1A4
D
1B6
1B5
GND
GND
1A5
1A6
E
1B8
1B7
1A7
1A8
F
2B1
2B2
2A2
2A1
G
2B3
2B4
GND
GND
2A4
2A3
H
2B5
2B6
V
CCB
V
CCA
2A6
2A5
J
2B7
2B8
GND
GND
2A8
2A7
K
2DIR
NC
NC
NC
NC
2OE
(1)
NC No internal connection
FUNCTION TABLE
(1)
(EACH 16-BIT SECTION)
CONTROL INPUTS
OUTPUT CIRCUITS
OPERATION
OE
DIR
A PORT
B PORT
L
L
Enabled
Hi-Z
B data to A bus
L
H
Hi-Z
Enabled
A data to B bus
H
X
Hi-Z
Hi-Z
Isolation
(1)
Input circuits of the data I/Os are always active.
2
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To Seven Other Channels
1DIR
1A1
1B1
1OE
To Seven Other Channels
2DIR
2A1
2B1
2OE
1
47
24
36
48
2
25
13
Absolute Maximum Ratings
(1)
SN74LVCH16T245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES635A JULY 2005 REVISED AUGUST 2005
LOGIC DIAGRAM (POSITIVE LOGIC)
over operating free-air temperature range (unless otherwise noted)
MIN
MAX
UNIT
V
CCA
Supply voltage range
0.5
6.5
V
V
CCB
I/O ports (A port)
0.5
6.5
V
I
Input voltage range
(2)
I/O ports (B port)
0.5
6.5
V
Control inputs
0.5
6.5
V
O
Voltage range applied to any output
A port
0.5
6.5
V
in the high-impedance or power-off state
(2)
B port
0.5
6.5
A port
0.5 V
CCA
+ 0.5
V
O
Voltage range applied to any output in the high or low state
(2) (3)
V
B port
0.5 V
CCB
+ 0.5
I
IK
Input clamp current
V
I
< 0
50
mA
I
OK
Output clamp current
V
O
< 0
50
mA
I
O
Continuous output current
50
mA
Continuous current through each V
CCA
, V
CCB
, and GND
100
mA
DGG package
70
JA
Package thermal impedance
(4)
DGV package
58
C/W
GQL/ZQL package
28
T
stg
Storage temperature range
65
150
C
(1)
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2)
The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
(3)
The output positive-voltage rating may be exceeded up to 6.5 V maximum if the output current rating is observed.
(4)
The package thermal impedance is calculated in accordance with JESD 51-7.
3
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Recommended Operating Conditions
(1) (2) (3)
SN74LVCH16T245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES635A JULY 2005 REVISED AUGUST 2005
V
CCI
V
CCO
MIN
MAX
UNIT
V
CCA
1.65
5.5
Supply voltage
V
V
CCB
1.65
5.5
1.65 V to 1.95 V
V
CCI
0.65
2.3 V to 2.7 V
1.7
High-level
V
IH
Data inputs
(4)
V
input voltage
3 V to 3.6 V
2
4.5 V to 5.5 V
V
CCI
0.7
1.65 V to 1.95 V
V
CCI
0.35
2.3 V to 2.7 V
0.7
Low-level
V
IL
Data inputs
(4)
V
input voltage
3 V to 3.6 V
0.8
4.5 V to 5.5 V
V
CCI
0.3
1.65 V to 1.95 V
V
CCA
0.65
2.3 V to 2.7 V
1.7
High-level
Control inputs
V
IH
V
input voltage
(referenced to V
CCA
)
(5)
3 V to 3.6 V
2
4.5 V to 5.5 V
V
CCA
0.7
1.65 V to 1.95 V
V
CCA
0.35
2.3 V to 2.7 V
0.7
Low-level
Control inputs
V
IL
V
input voltage
(referenced to V
CCA
)
(5)
3 V to 3.6 V
0.8
4.5 V to 5.5 V
V
CCA
0.3
V
I
Input voltage
Control inputs
0
5.5
V
Active state
0
V
CCO
V
I/O
Input/output voltage
V
3-State
0
5.5
1.65 V to 1.95 V
4
2.3 V to 2.7 V
8
I
OH
High-level output current
mA
3 V to 3.6 V
24
4.5 V to 5.5 V
32
1.65 V to 1.95 V
4
2.3 V to 2.7 V
8
I
OL
Low-level output current
mA
3 V to 3.6 V
24
4.5 V to 5.5 V
32
1.65 V to 1.95 V
20
2.3 V to 2.7 V
20
Input transition
t/
v
Data inputs
ns/V
rise or fall rate
3 V to 3.6 V
10
4.5 V to 5.5 V
5
T
A
Operating free-air temperature
40
85
C
(1)
V
CCI
is the V
CC
associated with the data input port.
(2)
V
CCO
is the V
CC
associated with the output port.
(3)
All unused control inputs of the device must be held at V
CCA
GND to ensure proper device operation and minimize power consumption.
Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
(4)
For V
CCI
values not specified in the data sheet, V
IH
min = V
CCI
0.7 V, V
IL
max = V
CCI
0.3 V.
(5)
For V
CCA
values not specified in the data sheet, V
IH
min = V
CCA
0.7 V, V
IL
max = V
CCA
0.3 V.
4
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Electrical Characteristics
(1) (2)
SN74LVCH16T245
16-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES635A JULY 2005 REVISED AUGUST 2005
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V
CCA
V
CCB
MIN
TYP
MAX
MIN
MAX
UNIT
I
OH
= 100
A,
V
I
= V
IH
1.65 V to 4.5 V
1.65 V to 4.5 V
V
CCO
0.1
I
OH
= 4 mA,
V
I
= V
IH
1.65 V
1.65 V
1.2
V
OH
I
OH
= 8 mA,
V
I
= V
IH
2.3 V
2.3 V
1.9
V
I
OH
= 24 mA,
V
I
= V
IH
3 V
3 V
2.4
I
OH
= 32 mA,
V
I
= V
IH
4.5 V
4.5 V
3.8
I
OL
= 100
A,
V
I
= V
IL
1.65 V to 4.5 V
1.65 V to 4.5 V
0.1
I
OL
= 4 mA,
V
I
= V
IL
1.65 V
1.65 V
0.45
V
OL
I
OL
= 8 mA,
V
I
= V
IL
2.3 V
2.3 V
0.3
V
I
OL
= 24 mA,
V
I
= V
IL
3 V
3 V
0.55
I
OL
= 32 mA,
V
I
= V
IL
4.5 V
4.5 V
0.55
Control
I
I
V
I
= V
CCA
or GND
1.65 V to 5.5 V
1.65 V to 5.5 V
0.5
1
2
A
inputs
V
I
= 0.58 V
1.65 V
1.65 V
15
V
I
= 0.7 V
2.3 V
2.3 V
45
I
BHL
(3)
A
V
I
= 0.8 V
3 V
3 V
75
V
I
= 0.1.35 V
4.5 V
4.5 V
100
V
I
= 1.07 V
1.65 V
1.65 V
15
V
I
= 1.7 V
2.3 V
2.3 V
45
I
BHH
(4)
A
V
I
= 2 V
3 V
3 V
75
V
I
= 3.15 V
4.5 V
4.5 V
100
1.95 V
1.95 V
200
2.7 V
2.7 V
300
I
BHLO
(5)
V
I
= 0 to V
CC
A
3.6 V
3.6 V
500
5.5 V
5.5 V
900
1.95 V
1.95 V
200
2.7 V
2.7 V
300
I
BHHO
(6)
V
I
= 0 to V
CC
A
3.6 V
3.6 V
500
5.5 V
5.5 V
900
A port
0 V
0 to 5.5 V
0.5
1
2
I
off
V
I
or V
O
= 0 to 5.5 V
A
B port
0 to 5.5 V
0 V
0.5
1
2
A or B
OE = V
IH
1.65 V to 5.5 V
1.65 V to 5.5 V
1
2
V
O
= V
CCO
or
port
I
OZ
GND,
A
B port
0 V
5.5 V
1
2
OE = don't
V
I
= V
CCI
or GND
care
A port
5.5 V
0 V
1
2
1.65 V to 5.5 V
1.65 V to 5.5 V
20
I
CCA
V
I
= V
CCI
or GND, I
O
= 0
5 V
0 V
20
A
0 V
5 V
2
1.65 V to 5.5 V
1.65 V to 5.5 V
20
I
CCB
V
I
= V
CCI
or GND, I
O
= 0
5 V
0 V
2
A
0 V
5 V
20
I
CCA
+ I
CCB
V
I
= V
CCI
or GND, I
O
= 0
1.65 V to 5.5 V
1.65 V to 5.5 V
30
A
(1)
V
CCO
is the V
CC
associated with the output port.
(2)
V
CCI
is the V
CC
associated with the input port.
(3)
The bus-hold circuit can sink at least the minimum low sustaining current at V
IL
max. I
BHL
should be measured after lowering V
IN
to GND
and then raising it to V
IL
max.
(4)
The bus-hold circuit can source at least the minimum high sustaining current at V
IH
min. I
BHH
should be measured after raising V
IN
to
V
CC
and then lowering it to V
IH
min.
(5)
An external driver must source at least I
BHLO
to switch this node from low to high.
(6)
An external driver must sink at least I
BHHO
to switch this node from high to low.
5
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