SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F NOVEMBER 1996 REVISED AUGUST 1998
1
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
D
EPIC
TM
(Enhanced-Performance Implanted
CMOS) Submicron Process
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015; Exceeds 200 V
Using Machine Model (C = 200 pF, R = 0)
D
Latch-Up Performance Exceeds 250 mA Per
JESD 17
D
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
This 8-bit (octal) noninverting bus transceiver
contains two separate supply rails. The B port is
designed to track V
CCB
,
which accepts voltages
from 3 V to 5.5 V, and the A port is designed to
track V
CCA
, which operates at 2.3 V to 3.6 V. This
allows for translation from a 3.3-V to a 5-V system
environment and vice versa, or from a 2.5-V to a
3.3-V system environment and vice versa.
The SN74LVCC3245A is designed for asynchronous communication between data buses. The device
transmits 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 device so the buses are
effectively isolated.
The SN74LVCC3245A is characterized for operation from 40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
OPERATION
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
Copyright
©
1998, Texas Instruments Incorporated
PRODUCTION DATA information is 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.
EPIC is a trademark of Texas Instruments Incorporated.
DB, DW, OR PW PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
V
CCB
NC
OE
B1
B2
B3
B4
B5
B6
B7
B8
GND
NC No internal connection
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F NOVEMBER 1996 REVISED AUGUST 1998
2
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
logic diagram (positive logic)
DIR
OE
A1
B1
To Seven Other Channels
2
3
22
21
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CCA
and V
CCB
0.5 V to 6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
: All A port (see Note 2)
0.5 V to V
CCA
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
All B port (see Note 1)
0.5 V to V
CCB
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Except I/O ports (see Note 2)
0.5 V to V
CCA
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
(see Note 1): All A port
0.5 V to V
CCA
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
All B port
0.5 V to V
CCB
+ 0.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, I
IK
(V
I
< 0)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, I
OK
(V
O
< 0)
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
±
50 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through V
CCA
, V
CCB
, or GND
±
100 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 3): DB package
104
°
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package
81
°
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PW package
120
°
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. This value is limited to 6 V maximum.
2. This value is limited to 4.6 V maximum.
3. The package thermal impedance is calculated in accordance with JESD 51.
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F NOVEMBER 1996 REVISED AUGUST 1998
3
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
recommended operating conditions (see Note 4)
VCCA
VCCB
MIN
NOM
MAX
UNIT
VCCA
Supply voltage
2.3
3.3
3.6
V
VCCB
Supply voltage
3
5
5.5
V
2.3 V
3 V
1.7
VIHA
High level input voltage
VOB
0 1 V
VOB
VCCB 0 1 V
2.7 V
3 V
2
V
VIHA
High-level input voltage
VOB
0.1 V,
VOB
VCCB 0.1 V
3 V
3.6 V
2
V
3.6 V
5.5 V
2
2.3 V
3 V
2
VIHB
High level input voltage
VOA
0 1 V
VOA
VCCA 0 1 V
2.7 V
3 V
2
V
VIHB
High-level input voltage
VOA
0.1 V,
VOA
VCCA 0.1 V
3 V
3.6 V
2
V
3.6 V
5.5 V
3.85
2.3 V
3 V
0.7
VILA
Low level input voltage
VOB
0 1 V
VOB
VCCB 0 1 V
2.7 V
3 V
0.8
V
VILA
Low-level input voltage
VOB
0.1 V,
VOB
VCCB 0.1 V
3 V
3.6 V
0.8
V
3.6 V
5.5 V
0.8
2.3 V
3 V
0.8
VILB
Low level input voltage
VOA
0 1 V
VOA
VCCA 0 1 V
2.7 V
3 V
0.8
V
VILB
Low-level input voltage
VOA
0.1 V,
VOA
VCCA 0.1 V
3 V
3.6 V
0.8
V
3.6 V
5.5 V
1.65
VIA
Input voltage
0
VCCA
V
VIB
Input voltage
0
VCCB
V
VOA
Output voltage
0
VCCA
V
VOB
Output voltage
0
VCCB
V
2.3 V
3 V
8
IOHA
High-level output current
2.7 V
3 V
12
mA
3.3 V
3 V
24
2.3 V
3.3 V
12
IOHB
High-level output current
2.7 V
3.3 V
12
mA
3.3 V
3 V
24
2.3 V
3 V
8
IOLA
Low-level output current
2.7 V
3 V
12
mA
3.3 V
3 V
24
2.3 V
3.3 V
12
IOLB
Low-level output current
2.7 V
3.3 V
12
mA
3.3 V
3 V
24
t/
v
Input transition rise or fall rate
0
10
ns/V
TA
Operating free-air temperature
40
85
°
C
NOTE 4: All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. Refer to the TI application
report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F NOVEMBER 1996 REVISED AUGUST 1998
4
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCCA
VCCB
MIN
TYP
MAX
UNIT
IOH = 100
µ
A
3 V
3 V
2.9
3
IOH = 8 mA
2.3 V
3 V
2
VOHA
IOH = 12 mA
2.7 V
3 V
2.2
2.5
V
VOHA
IOH = 12 mA
3 V
3 V
2.4
2.8
V
IOH = 24 mA
3 V
3 V
2.2
2.6
IOH = 24 mA
2.7 V
4.5 V
2
2.3
IOH = 100
µ
A
3 V
3 V
2.9
3
IOH = 12 mA
2.3 V
3 V
2.4
VOHB
IOH = 12 mA
2.7 V
3 V
2.4
2.8
V
IOH = 24 mA
3 V
3 V
2.2
2.6
IOH = 24 mA
2.7 V
4.5 V
3.2
4.2
IOL = 100
µ
A
3 V
3 V
0.1
IOL = 8 mA
2.3 V
3 V
0.6
VOLA
IOL = 12 mA
2.7 V
3 V
0.1
0.5
V
IOL = 24 mA
3 V
3 V
0.2
0.5
IOL = 24 mA
2.7 V
4.5 V
0.2
0.5
IOL = 100
µ
A
3 V
3 V
0.1
VOLB
IOL = 12 mA
2.3 V
3 V
0.4
V
VOLB
IOL = 24 mA
3 V
3 V
0.2
0.5
V
IOL = 24 mA
3 V
4.5 V
0.2
0.5
II
Control inputs
VI = VCCA or GND
3 6 V
3.6 V
±
0.1
±
1
µ
A
II
Control inputs
VI = VCCA or GND
3.6 V
5.5 V
±
0.1
±
1
µ
A
IOZ
A or B ports
VO = VCCA/B or GND,
VI = VIL or VIH
3.6 V
3.6 V
±
0.5
±
5
µ
A
A port = VCCA or GND,
IO = 0
3.6 V
Open
5
50
ICCA
B to A
B port = VCCB or GND
IO = 0
3 6 V
3.6 V
5
50
µ
A
B port = VCCB or GND,
IO = 0
3.6 V
5.5 V
5
50
ICCB
A to B
A port = VCCA or GND
IO = 0
3 6 V
3.6 V
5
50
µ
A
ICCB
A to B
A port = VCCA or GND,
IO = 0
3.6 V
5.5 V
8
80
µ
A
A port
VI = VCCA 0.6 V, Other inputs at VCCA or GND,
OE at GND and DIR at VCCA
3.6 V
3.6 V
0.35
0.5
ICCA
OE
VI = VCCA 0.6 V, Other inputs at VCCA or GND,
DIR at VCCA
3.6 V
3.6 V
0.35
0.5
mA
DIR
VI = VCCA 0.6 V, Other inputs at VCCA or GND,
OE at GND
3.6 V
3.6 V
0.35
0.5
ICCB
B port
VI = VCCB 2.1 V, Other inputs at VCCB or GND,
OE at GND and DIR at GND
3.6 V
5.5 V
1
1.5
mA
Ci
Control inputs
VI = VCCA or GND
Open
Open
4
pF
Cio
A or B ports
VO = VCCA/B or GND
3.3 V
5 V
18.5
pF
C d
A to B
Outputs enabled
3.3 V
5 V
38
pF
Cpd
B to A
Outputs enabled
3.3 V
5 V
36.5
pF
For I/O ports, the parameter IOZ includes the input leakage current.
This is the increase in supply current for each input that is at one of the specified voltage levels rather than 0 V or the associated VCC.
SN74LVCC3245A
OCTAL BUS TRANSCEIVER WITH ADJUSTABLE OUTPUT VOLTAGE
AND 3-STATE OUTPUTS
SCAS585F NOVEMBER 1996 REVISED AUGUST 1998
5
POST OFFICE BOX 655303
·
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figures 1 through 4)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCCA = 2.5 V
±
0.2 V,
VCCB = 3.3 V
±
0.3 V
VCCA = 2.7 V TO 3.6 V,
VCCB = 5 V
±
0.5 V
VCCA = 2.7 V TO 3.6 V,
VCCB = 3.3 V
±
0.3 V
UNIT
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
MIN
MAX
tPHL
A
B
1
9.4
1
6
1
7.1
ns
tPLH
A
B
1
9.1
1
5.3
1
7.2
ns
tPHL
B
A
1
11.2
1
5.8
1
6.4
ns
tPLH
B
A
1
9.9
1
7
1
7.6
ns
tPZL
OE
A
1
14.5
1
9.2
1
9.7
ns
tPZH
OE
A
1
12.9
1
9.5
1
9.5
ns
tPZL
OE
B
1
13
1
8.1
1
9.2
ns
tPZH
OE
B
1
12.8
1
8.4
1
9.9
ns
tPLZ
OE
A
1
7.1
1
5.5
1
6.6
ns
tPHZ
OE
A
1
6.9
1
7.8
1
6.9
ns
tPLZ
OE
B
1
8.8
1
7.3
1
7.5
ns
tPHZ
OE
B
1
8.9
1
7
1
7.9
ns
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