SN74LVCZ16245A
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES278D JUNE 1999 REVISED AUGUST 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Member of the Texas Instruments
Widebus
Family
D
Operates From 2.7 V to 3.6 V
D
Inputs Accept Voltages to 5.5 V
D
Max t
pd
of 3.7 ns at 3.3 V
D
I
off
and Power-Up 3-State Support Hot
Insertion
D
Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
3.3-V V
CC
)
D
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D
ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
1000-V Charged-Device Model (C101)
description/ordering information
This 16-bit (dual-octal) noninverting bus
transceiver is designed for 2.7-V to 3.6-V V
CC
operation.
The SN74LVCZ16245A is designed for
asynchronous communication between data
buses. The control-function implementation
minimizes external timing requirements.
This device can be used as two 8-bit transceivers
or one 16-bit transceiver. It allows data
transmission 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 that the buses
are effectively isolated.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
When V
CC
is between 0 and 1.5 V, the device is 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.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
SSOP
DL
Tube
SN74LVCZ16245ADL
LVCZ16245A
40
C to 85
C
SSOP DL
Tape and reel
SN74LVCZ16245ADLR
LVCZ16245A
40
C to 85
C
TSSOP DGG
Tape and reel
SN74LVCZ16245ADGGR
LVCZ16245A
TVSOP DGV
Tape and reel
SN74LVCZ16245ADGVR
CW245A
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
Copyright
2002, Texas Instruments Incorporated
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.
Widebus is a trademark of Texas Instruments.
DGG, DGV, OR DL 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
CC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
V
CC
2B5
2B6
GND
2B7
2B8
2DIR
1OE
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE
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.
SN74LVCZ16245A
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES278D JUNE 1999 REVISED AUGUST 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
This device is 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 device when it is 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
(each 8-bit section)
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)
To Seven Other Channels
1DIR
1A1
1B1
1OE
To Seven Other Channels
2DIR
2A1
2B1
2OE
1
47
24
36
48
2
25
13
SN74LVCZ16245A
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES278D JUNE 1999 REVISED AUGUST 2002
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 6.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
(see Note 1)
0.5 V to 6.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high-impedance or power-off state, V
O
(see Note 1)
0.5 V to 6.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high or low state, V
O
(see Notes 1 and 2)
0.5 V to V
CC
+ 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 each V
CC
or GND
100 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 3): DGG package
70
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DGV package
58
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DL package
63
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 negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The value of VCC is provided in the recommended operating conditions table.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 4)
MIN
MAX
UNIT
VCC
Supply voltage
2.7
3.6
V
VIH
High-level input voltage
VCC = 2.7 V to 3.6 V
2
V
VIL
Low-level input voltage
VCC = 2.7 V to 3.6 V
0.8
V
VI
Input voltage
0
5.5
V
VO
Output voltage
High or low state
0
VCC
V
VO
Output voltage
3-state
0
5.5
V
IOH
High level output current
VCC = 2.7 V
12
mA
IOH
High-level output current
VCC = 3 V
24
mA
IOL
Low level output current
VCC = 2.7 V
12
mA
IOL
Low-level output current
VCC = 3 V
24
mA
t/
v
Input transition rise or fall rate
6
ns/V
t/
VCC
Power-up ramp rate
150
s/V
TA
Operating free-air temperature
40
85
C
NOTE 4: All unused 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.
SN74LVCZ16245A
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES278D JUNE 1999 REVISED AUGUST 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
UNIT
IOH = 100
A
2.7 V to 3.6 V
VCC0.2
VOH
IOH = 12 mA
2.7 V
2.2
V
VOH
IOH = 12 mA
3 V
2.4
V
IOH = 24 mA
3 V
2.2
IOL = 100
A
2.7 V to 3.6 V
0.2
VOL
IOL = 12 mA
2.7 V
0.4
V
IOL = 24 mA
3 V
0.55
II
Control inputs
VI = 0 to 5.5 V
3.6 V
5
A
Ioff
VI or VO = 5.5 V
0
5
A
IOZ
VO = 0 to 5.5 V
3.6 V
5
A
IOZPU
VO = 0.5 V to 2.5 V,
OE = don't care
0 to 1.5 V
5
A
IOZPD
VO = 0.5 V to 2.5 V,
OE = don't care
1.5 V to 0
5
A
ICC
VI = VCC or GND
IO = 0
3 6 V
60
A
ICC
3.6 V
VI
5.5 V
IO = 0
3.6 V
60
A
ICC
One input at VCC 0.6 V, Other inputs at VCC or GND
2.7 V to 3.6 V
500
A
Ci
Control inputs
VI = VCC or GND
3.3 V
5
pF
Cio
A or B ports
VO = VCC or GND
3.3 V
6.5
pF
All typical values are at VCC = 3.3 V, TA = 25
C.
For I/O ports, the parameter IOZ includes the input leakage current.
This applies in the disabled state only.
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 2.7 V
VCC = 3.3 V
0.3 V
UNIT
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
tpd
A or B
B or A
4.2
1.3
4
ns
ten
OE
A or B
6.1
1.4
5.6
ns
tdis
OE
A or B
7.1
2
6.6
ns
switching characteristics over recommended operating free-air temperature range, C
L
= 30 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 2.7 V
VCC = 3.3 V
0.3 V
UNIT
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
tpd
A or B
B or A
3.9
1
3.7
ns
ten
OE
A or B
5.9
1.1
5.4
ns
tdis
OE
A or B
6.7
1.6
6.2
ns
SN74LVCZ16245A
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES278D JUNE 1999 REVISED AUGUST 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
operating characteristics, T
A
= 25
C
PARAMETER
TEST
VCC = 3.3 V
UNIT
PARAMETER
CONDITIONS
TYP
UNIT
Cpd
Power dissipation capacitance per transceiver
Outputs enabled
f = 10 MHz
42
pF
Cpd
Power dissipation capacitance per transceiver
Outputs disabled
f = 10 MHz
4
pF
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