SN54LVTH2245, SN74LVTH2245
3.3 V ABT OCTAL BUS TRANSCEIVERS
WITH 3 STATE OUTPUTS
SCBS707E - SEPTEMBER 1997 - REVISED OCTOBER 2003
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Support Mixed-Mode Signal Operation (5-V
Input and Output Voltages With 3.3-V V
CC
)
D
Support Unregulated Battery Operation
Down to 2.7 V
D
Typical V
OLP
(Output Ground Bounce)
<0.8 V at V
CC
= 3.3 V, T
A
= 25
C
D
B-Port Outputs Have Equivalent 22-
Series Resistors, So No External Resistors
Are Required
D
I
off
and Power-Up 3-State Support Hot
Insertion
D
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
D
Latch-Up Performance Exceeds 500 mA Per
JESD 17
D
ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
description/ordering information
These octal bus transceivers are designed
specifically for low-voltage (3.3-V) V
CC
operation,
but with the capability to provide a TTL interface
to a 5-V system environment.
These devices are designed for asynchronous
communication between data buses. They
transmit data from the A bus to the B bus or from
the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE)
input can be used to disable the devices so the buses are effectively isolated.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE MARKING
SOIC - DW
Tube
SN74LVTH2245DW
LVTH2245
SOIC - DW
Tape and reel
SN74LVTH2245DWR
LVTH2245
SOP - NS
Tape and reel
SN74LVTH2245NSR
LVTH2245
-40
C to 85
C
SSOP - DB
Tape and reel
SN74LVTH2245DBR
LK245
-40 C to 85 C
TSSOP - PW
Tube
SN74LVTH2245PW
LK245
TSSOP - PW
Tape and reel
SN74LVTH2245PWR
LK245
TVSOP - DGV
Tape and reel
SN74LVTH2245DGVR
LK245
CDIP - J
Tube
SNJ54LVTH2245J
SNJ54LVTH2245J
-55
C to 125
C
CFP - W
Tube
SNJ54LVTH2245W
SNJ54LVTH2245W
-55 C to 125 C
LCCC - FK
Tube
SNJ54LVTH2245FK
SNJ54LVTH2245FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Copyright
2003, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all
parameters.
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.
SN54LVTH2245 . . . J OR W PACKAGE
SN74LVTH2245 . . . DB, DGV, DW, NS, OR PW PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
A2
A1
DIR
B7
B6
OE
A8
G
ND
B8
V
CC
SN54LVTH2245 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
SN54LVTH2245, SN74LVTH2245
3.3 V ABT OCTAL BUS TRANSCEIVERS
WITH 3 STATE OUTPUTS
SCBS707E - SEPTEMBER 1997 - REVISED OCTOBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup
or pulldown resistors with the bus-hold circuitry is not recommended.
The B-port outputs, which are designed to source or sink up to 12 mA, include equivalent 22-
series resistors
to reduce overshoot and undershoot.
When V
CC
is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, 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.
These devices are fully specified for hot-insertion applications using I
off
and power-up 3-state. The I
off
circuitry
disables the outputs, preventing damaging current backflow through the devices when they are powered down.
The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
logic diagram (positive logic)
DIR
OE
A1
B1
To Seven Other Channels
1
2
19
18
SN54LVTH2245, SN74LVTH2245
3.3 V ABT OCTAL BUS TRANSCEIVERS
WITH 3 STATE OUTPUTS
SCBS707E - SEPTEMBER 1997 - REVISED OCTOBER 2003
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
-0.5 V to 4.6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
-0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high-impedance
or power-off state, V
O
(see Note 1)
-0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state, V
O
(see Note 1)
-0.5 V to V
CC
+ 0.5 V
. . . . . . . . . . . . .
Current into any output in the low state, I
O
: SN54LVTH2245 (A port)
96 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74LVTH2245 (A port)
128 mA
. . . . . . . . . . . . . . . . . . . . . . . . . .
B port
30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the high state, I
O
(see Note 2): SN54LVTH2245 (A port)
48 mA
. . . . . . . . . . . . . . .
SN74LVTH2245 (A port)
64 mA
. . . . . . . . . . . . . . .
B port
30 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0)
-50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0)
-50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 3): DB package
70
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGV package
92
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package
58
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package
60
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package
83
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
-65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
NOTES:
1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. This current flows only when the output is in the high state and VO > VCC.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 4)
SN54LVTH2245
SN74LVTH2245
UNIT
MIN
MAX
MIN
MAX
UNIT
VCC
Supply voltage
2.7
3.6
2.7
3.6
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
VI
Input voltage
5.5
5.5
V
IOH
High-level output current
A port
-24
-32
mA
IOH
High-level output current
B port
-12
-12
mA
IOL
Low-level output current
A port
48
64
mA
IOL
Low-level output current
B port
12
12
mA
t/
v
Input transition rise or fall rate
Outputs enabled
10
10
ns/V
t/
VCC
Power-up ramp rate
200
200
s/V
TA
Operating free-air temperature
-55
125
-40
85
C
NOTE 4: All unused control inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
SN54LVTH2245, SN74LVTH2245
3.3 V ABT OCTAL BUS TRANSCEIVERS
WITH 3 STATE OUTPUTS
SCBS707E - SEPTEMBER 1997 - REVISED OCTOBER 2003
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54LVTH2245
SN74LVTH2245
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 2.7 V,
II = -18 mA
-1.2
-1.2
V
VCC = 2.7 V to 3.6 V,
IOH = -100
A
VCC-0.2
VCC-0.2
A port
VCC = 2.7 V,
IOH = -8 mA
2.4
2.4
VOH
A port
VCC = 3 V
IOH = -24 mA
2
V
VOH
VCC = 3 V
IOH = -32 mA
2
V
B port
VCC = 2.7 V to 3.6 V,
IOH = -100
A
VCC-0.2
VCC-0.2
B port
VCC = 3 V,
IOH = -12 mA
2
2
VCC = 2.7 V
IOL = 100
A
0.2
0.2
VCC = 2.7 V
IOL = 24 mA
0.5
0.5
A port
IOL = 16 mA
0.4
0.4
VOL
A port
VCC = 3 V
IOL = 32 mA
0.5
0.5
V
VOL
VCC = 3 V
IOL = 48 mA
0.55
V
IOL = 64 mA
0.55
B port
VCC = 2.7 V to 3.6 V,
IOL = 100
A
0.2
0.2
B port
VCC = 3 V,
IOL = 12 mA
0.8
0.8
Control inputs
VCC = 3.6 V,
VI = VCC or GND
1
1
Control inputs
VCC = 0 or 3.6 V,
VI = 5.5 V
10
10
II
VI = 5.5 V
20
20
A
II
A or B ports
VCC = 3.6 V
VI = VCC
1
1
A
A or B ports
VCC = 3.6 V
VI = 0
-5
-5
Ioff
VCC = 0,
VI or VO = 0 to 4.5 V
100
A
VCC = 3 V
VI = 0.8 V
75
75
II(hold)
A or B ports
VCC = 3 V
VI = 2 V
-75
-75
A
II(hold)
A or B ports
VCC = 3.6 V,
VI = 0 to 3.6 V
500
-750
A
IOZPU
VCC = 0 to 1.5 V, VO = 0.5 V to 3 V,
OE = don't care
100*
100
A
IOZPD
VCC = 1.5 V to 0, VO = 0.5 V to 3 V,
OE = don't care
100*
100
A
VCC = 3.6 V,
Outputs high
0.19
0.1
0.19
ICC
VCC = 3.6 V,
IO = 0,
V = V
or GND
Outputs low
5
3
5
mA
ICC
IO = 0,
VI = VCC or GND
Outputs disabled
0.19
0.1
0.19
mA
ICC
VCC = 3 V to 3.6 V, One input at VCC - 0.6 V,
Other inputs at VCC or GND
0.2
0.2
mA
Ci
VI = 3 V or 0
4
4
pF
Cio
VO = 3 V or 0
9
9
pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested.
All typical values are at VCC = 3.3 V, TA = 25
C.
Unused terminals are at VCC or GND.
This is the bus-hold maximum dynamic current. It is the minimum overdrive current required to switch the input from one state to another.
This is the increase in supply current for each input that is at the specified TTL voltage level, rather than VCC or GND.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
SN54LVTH2245, SN74LVTH2245
3.3 V ABT OCTAL BUS TRANSCEIVERS
WITH 3 STATE OUTPUTS
SCBS707E - SEPTEMBER 1997 - REVISED OCTOBER 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
SN54LVTH2245
SN74LVTH2245
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 3.3 V
0.3 V
VCC = 2.7 V
VCC = 3.3 V
0.3 V
VCC = 2.7 V
UNIT
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
MIN
TYP
MAX
MIN
MAX
tPLH
A
B
1
4.6
5.3
1.1
2.9
4.4
5.1
ns
tPHL
A
B
1
4.6
5.3
1.1
2.6
4.4
5.1
ns
tPLH
B
A
1
3.7
4.2
1.1
2.2
3.5
4
ns
tPHL
B
A
1
3.7
4.2
1.1
2
3.5
4
ns
tPZH
OE
A
1.2
5.7
7.4
1.3
3.1
5.5
7.1
ns
tPZL
OE
A
1.6
5.7
6.8
1.7
3.2
5.5
6.5
ns
tPHZ
OE
A
2
6.2
6.8
2.2
3.6
5.9
6.5
ns
tPLZ
OE
A
2
5.3
5.5
2.2
3.4
5
5.1
ns
tPZH
OE
B
1.2
6.4
7.6
1.3
3.5
6.2
7.3
ns
tPZL
OE
B
1.6
6.4
7.5
1.7
3.7
6.2
7.3
ns
tPHZ
OE
B
2
6.1
6.8
2.2
3.9
5.9
6.5
ns
tPLZ
OE
B
2
5.7
5.9
2.2
3.7
5.4
5.7
ns
All typical values are at VCC = 3.3 V, TA = 25
C.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
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