SN54LVT16244B, SN74LVT16244B
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS716 MARCH 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Members of the Texas Instruments
Widebus
TM
Family
D
State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low Static-Power
Dissipation
D
Support Mixed-Mode Signal Operation
(5-V Input and Output Voltages With
3.3-V V
CC
)
D
I
off
and Power-Up 3-State Support Hot
Insertion
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
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D
ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
200-V Machine Model (A115-A)
1000-V Charged-Device Model (C101)
D
Package Options Include Plastic Shrink
Small-Outline (DL), Thin Shrink
Small-Outline (DGG), and Thin Very
Small-Outline (DGV) Packages and 380-mil
Fine-Pitch Ceramic Flat (WD) Package
Using 25-mil Center-to-Center Spacings
description
The 'LVT16244B devices are 16-bit buffers and line drivers designed 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 can be used as four
4-bit buffers, two 8-bit buffers, or one 16-bit buffer. These devices provide true outputs and symmetrical
active-low output-enable (OE) inputs.
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.
The SN54LVT16244B is characterized for operation over the full military temperature range of 55
C to 125
C.
The SN74LVT16244B is characterized for operation from 40
C to 85
C.
Copyright
2000, 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.
SN54LVT16244B . . . WD PACKAGE
SN74LVT16244B . . . 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
1OE
1Y1
1Y2
GND
1Y3
1Y4
V
CC
2Y1
2Y2
GND
2Y3
2Y4
3Y1
3Y2
GND
3Y3
3Y4
V
CC
4Y1
4Y2
GND
4Y3
4Y4
4OE
2OE
1A1
1A2
GND
1A3
1A4
V
CC
2A1
2A2
GND
2A3
2A4
3A1
3A2
GND
3A3
3A4
V
CC
4A1
4A2
GND
4A3
4A4
3OE
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.
SN54LVT16244B, SN74LVT16244B
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS716 MARCH 2000
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
(each 4-bit buffer)
INPUTS
OUTPUT
OE
A
Y
L
H
H
L
L
L
H
X
Z
logic symbol
47
1A1
46
1A2
44
1A3
43
1A4
1Y1
2
1Y2
3
1Y3
5
1Y4
6
41
2A1
40
2A2
38
2A3
37
2A4
2Y1
8
2Y2
9
2Y3
11
2Y4
12
36
3A1
35
3A2
33
3A3
32
3A4
3Y1
13
3Y2
14
3Y3
16
3Y4
17
30
4A1
29
4A2
27
4A3
26
4A4
4Y1
19
4Y2
20
4Y3
22
4Y4
23
EN1
1
EN4
24
1OE
2OE
3OE
4OE
EN2
48
EN3
25
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
1
1
1
1
1
2
3
4
SN54LVT16244B, SN74LVT16244B
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS716 MARCH 2000
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
1OE
1A1
1A2
1A3
1A4
1Y1
1Y2
1Y3
1Y4
1
47
46
44
43
2
3
5
6
2OE
2A1
2A2
2A3
2A4
2Y1
2Y2
2Y3
2Y4
48
41
40
38
37
8
9
11
12
3OE
3A1
3A2
3A3
3A4
3Y1
3Y2
3Y3
3Y4
25
36
35
33
32
13
14
16
17
4OE
4A1
4A2
4A3
4A4
4Y1
4Y2
4Y3
4Y4
24
30
29
27
26
19
20
22
23
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
: SN54LVT16244B 96
mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74LVT16244B 128
mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the high state, I
O
(see Note 2): SN54LVT16244B
48 mA
. . . . . . . . . . . . . . . . . . . . .
SN74LVT16244B 64
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): 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 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.
SN54LVT16244B, SN74LVT16244B
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS716 MARCH 2000
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions (see Note 4)
SN54LVT16244B
SN74LVT16244B
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
24
32
mA
IOL
Low-level output current
48
64
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 inputs of the device must 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.
SN54LVT16244B, SN74LVT16244B
3.3-V ABT 16-BIT BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS716 MARCH 2000
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54LVT16244B
SN74LVT16244B
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
VCC0.2
VCC0.2
VOH
VCC = 2.7 V,
IOH = 8 mA
2.4
2.4
V
VOH
VCC = 3 V
IOH = 24 mA
2
V
VCC = 3 V
IOH = 32 mA
2
VCC = 2 7 V
IOL = 100
A
0.2
0.2
VCC = 2.7 V
IOL = 24 mA
0.5
0.5
VOL
IOL = 16 mA
0.4
0.4
V
VOL
VCC = 3 V
IOL = 32 mA
0.5
0.5
V
VCC = 3 V
IOL = 48 mA
0.55
IOL = 64 mA
0.55
VCC = 0 or 3.6 V,
VI = 5.5 V
50
10
II
Control inputs
VCC = 3.6 V,
VI = VCC or GND
1
1
A
II
Data inp ts
VCC = 3 6 V
VI = VCC
1
1
A
Data inputs
VCC = 3.6 V
VI = 0
5
5
Ioff
VCC = 0, VI or VO = 0 to 4.5 V
100
A
IOZH
VCC = 3.6 V,
VO = 3 V
5
5
A
IOZL
VCC = 3.6 V,
VO = 0.5 V
5
5
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
V
3 6 V I
0
Outputs high
0.19
0.19
ICC
VCC = 3.6 V, IO = 0,
VI = VCC or GND
Outputs low
5
5
mA
VI = VCC or GND
Outputs disabled
0.19
0.19
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
Co
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.
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.
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