SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
OE
4A
4B
4Y
3A
3B
3Y
1A
1B
1Y
2A
2B
2Y
16
1A
A/B
NC
VCC
OE
1
2
15
3
14
4
13
5
12
6
11
7
10
8
9
SN54LVC257A . . . FK PACKAGE
(TOP VIEW)
1B
1Y
NC
2A
2B
OE
4A
4B
4Y
3A
3B
4
3
2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
4A
4B
NC
4Y
3A
2Y
GND
NC
3Y
3B
1
VCC
A/B
1A
1B
1Y
2A
2B
2Y
GND
JESD 17
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
SN74LVC257A . . . RGY PACKAGE
(TOP VIEW)
3Y
SN54LVC257A . . . J OR W PACKAGE
SN74LVC257A . . . D, DB, NS,
OR PW PACKAGE
(TOP VIEW)
D
A/B
D
D Latch-Up Performance Exceeds 250 mA Per
Operate From 1.65 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max tpd of 4.6 ns at 3.3 V
Typical VOLP (Output Ground Bounce)
<0.8 V at VCC = 3.3 V, TA = 25°C
Typical VOHV (Output VOH Undershoot)
>2 V at VCC = 3.3 V, TA = 25°C
GND
D
D
D
D
NC − No internal connection
description/ordering information
These quadruple 2-line to 1-line data selectors/multiplexers are designed for 1.65-V to 3.6-V VCC operation.
The ’LVC257A devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in
bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (OE) input is at
a high logic level.
ORDERING INFORMATION
PACKAGE†
TA
QFN − RGY
SN74LVC257ARGYR
Tube of 40
SN74LVC257AD
Reel of 2500
SN74LVC257ADR
Reel of 250
SN74LVC257ADT
SOP − NS
Reel of 2000
SN74LVC257ANSR
LVC257A
SSOP − DB
Reel of 2000
SN74LVC257ADBR
LC257A
Tube of 90
SN74LVC257APW
Reel of 2000
SN74LVC257APWR
Reel of 250
SN74LVC257APWT
CDIP − J
Tube of 25
SNJ54LVC257AJ
SNJ54LVC257AJ
CFP − W
Tube of 150
SNJ54LVC257AW
SNJ54LVC257AW
LCCC − FK
Tube of 55
SNJ54LVC257AFK
SNJ54LVC257AFK
TSSOP − PW
−55°C
−55
C to 125
125°C
C
TOP-SIDE
MARKING
Reel of 1000
SOIC − D
−40°C
−40
C to 85
85°C
C
ORDERABLE
PART NUMBER
LC257A
LVC257A
LC257A
† 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.
Copyright 2003, Texas Instruments Incorporated
!"#$%! & '("")% $& ! *(+,'$%! -$%).
"!-('%& '!!"# %! &*)''$%!& *)" %/) %)"#& ! )0$& &%"(#)%&
&%$-$"- 1$""$%2. "!-('%! *"!')&&3 -!)& !% )')&&$",2 ',(-)
%)&%3 ! $,, *$"$#)%)"&.
*"!-('%& '!#*,$% %! 45 $,, *$"$#)%)"& $") %)&%)(,)&& !%/)"1&) !%)-. $,, !%/)" *"!-('%& *"!-('%!
*"!')&&3 -!)& !% )')&&$",2 ',(-) %)&%3 ! $,, *$"$#)%)"&.
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1
SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003
description/ordering information (continued)
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.
To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
FUNCTION TABLE
INPUTS
OE
A/B
A
B
OUTPUT
Y
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
logic diagram (positive logic)
OE
A/B
1A
1B
2A
2B
3A
3B
4A
4B
15
1
2
4
3
5
7
2Y
6
11
9
3Y
10
14
12
13
Pin numbers shown are for the D, DB, J, NS, PW, RGY, and W packages.
2
1Y
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4Y
SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 6.5 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 6.5 V
Output voltage range, VO (see Notes 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 V
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −50 mA
Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA
Package thermal impedance, θJA (see Note 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W
(see Note 3): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82°C/W
(see Note 3): NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64°C/W
(see Note 3): PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108°C/W
(see Note 4): RGY package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −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.
4. The package thermal impedance is calculated in accordance with JESD 51-5.
recommended operating conditions (see Note 5)
SN54LVC257A
MIN
MAX
MIN
MAX
2
3.6
1.65
3.6
Operating
VCC
Supply voltage
VIH
High-level input voltage
VIL
VI
VO
IOH
IOL
∆t/∆v
Low-level input voltage
Data retention only
SN74LVC257A
1.5
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V
UNIT
V
1.5
0.65 × VCC
1.7
2
V
2
0.35 × VCC
VCC = 1.65 V to 1.95 V
VCC = 2.3 V to 2.7 V
VCC = 2.7 V to 3.6 V
0.7
0.8
V
0.8
Input voltage
0
5.5
0
5.5
V
Output voltage
0
VCC
0
VCC
−4
V
High-level output current
Low-level output current
VCC = 1.65 V
VCC = 2.3 V
VCC = 2.7 V
VCC = 3 V
−8
−12
−12
−24
−24
VCC = 1.65 V
VCC = 2.3 V
VCC = 2.7 V
VCC = 3 V
Input transition rise or fall rate
mA
4
8
12
12
24
24
10
10
mA
ns/V
TA
Operating free-air temperature
−55
125
−40
85
°C
NOTE 5: 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.
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3
SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
IOH = −100 µA
IOH = −100 µA
VOH
SN54LVC257A
TYP†
MAX
VCC
1.65 V to 3.6 V
2.7 V to 3.6 V
IOH = −4 mA
IOH = −8 mA
SN74LVC257A
TYP†
MAX
MIN
MIN
VCC−0.2
VCC−0.2
1.65 V
1.2
2.3 V
IOH = −12 mA
IOH = −24 mA
1.7
2.7 V
2.2
2.2
3V
2.4
2.4
3V
2.2
2.2
V
1.65 V to 3.6 V
A
IOL = 100 µA
UNIT
0.2
2.7 V to 3.6 V
0.2
IOL = 4 mA
IOL = 8 mA
1.65 V
0.45
2.3 V
0.7
IOL = 12 mA
IOL = 24 mA
2.7 V
0.4
0.4
3V
0.55
0.55
VI = 5.5 V or GND
3.6 V
±5
±5
µA
IOZ
VO = VCC or GND
3.6 V
±15
±10
µA
ICC
VI = VCC or GND, IO = 0
One input at VCC − 0.6 V,
Other inputs at VCC or GND
3.6 V
10
10
µA
500
500
µA
VOL
II
∆ICC
Ci
VI = VCC or GND
Co
VO = VCC or GND
† All typical values are at VCC = 3.3 V, TA = 25°C.
2.7 V to 3.6 V
V
3.3 V
5
5
pF
3.3 V
5
5
pF
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
SN54LVC257A
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 2.7 V
MIN
A or B
Y
MAX
MIN
MAX
5.4
1
4.6
7.5
1
6.4
UNIT
tpd
A/B
ten
OE
Y
6.7
1
5.6
ns
tdis
OE
Y
4.7
0.5
4.3
ns
1
ns
tsk(o)
4
VCC = 3.3 V
± 0.3 V
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ns
SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003
switching characteristics over recommended operating free-air temperature range (unless
otherwise noted) (see Figure 1)
SN74LVC257A
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
A or B
Y
VCC = 1.8 V
± 0.15 V
VCC = 2.5 V
± 0.2 V
VCC = 2.7 V
VCC = 3.3 V
± 0.3 V
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
1
13.5
1
7.4
1
5.4
1
4.6
1
15.6
1
9.5
1
7.5
1
6.4
UNIT
tpd
A/B
ten
OE
Y
1
14.6
1
8.7
1
6.7
1
5.6
ns
tdis
OE
Y
1
15.4
1
6.7
1
4.7
1
4.3
ns
1
ns
tsk(o)
ns
operating characteristics, TA = 25°C
PARAMETER
Cpd
Power dissipation capacitance
TEST
CONDITIONS
VCC = 1.8 V
TYP
VCC = 2.5 V
TYP
VCC = 3.3 V
TYP
UNIT
f = 10 MHz
13.5
14.5
15.5
pF
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5
SCAS294N − JANUARY 1993 − REVISED OCTOBER 2003
PARAMETER MEASUREMENT INFORMATION
RL
From Output
Under Test
CL
(see Note A)
VLOAD
Open
S1
GND
RL
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
VLOAD
GND
LOAD CIRCUIT
INPUTS
VCC
1.8 V ± 0.15 V
2.5 V ± 0.2 V
2.7 V
3.3 V ± 0.3 V
VI
tr/tf
VCC
VCC
2.7 V
2.7 V
≤2 ns
≤2 ns
≤2.5 ns
≤2.5 ns
VM
VLOAD
CL
RL
V∆
VCC/2
VCC/2
1.5 V
1.5 V
2 × VCC
2 × VCC
6V
6V
30 pF
30 pF
50 pF
50 pF
1 kΩ
500 Ω
500 Ω
500 Ω
0.15 V
0.15 V
0.3 V
0.3 V
VI
Timing Input
VM
0V
tw
tsu
VI
Input
VM
VM
th
VI
Data Input
VM
VM
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
VI
VM
Input
VM
0V
tPLH
tPHL
VOH
VM
Output
VM
VOL
tPHL
Output
Waveform 1
S1 at VLOAD
(see Note B)
tPLH
VM
VM
VM
0V
tPLZ
tPZL
VLOAD/2
VM
VM
VOL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
Output
Waveform 2
S1 at GND
(see Note B)
VOL + V∆
VOL
tPHZ
tPZH
VOH
Output
VI
Output
Control
VM
VOH − V∆
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω.
D. The outputs are measured one at a time with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
6
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MECHANICAL DATA
MLCC006B – OCTOBER 1996
FK (S-CQCC-N**)
LEADLESS CERAMIC CHIP CARRIER
28 TERMINAL SHOWN
18
17
16
15
14
13
NO. OF
TERMINALS
**
12
19
11
20
10
A
B
MIN
MAX
MIN
MAX
20
0.342
(8,69)
0.358
(9,09)
0.307
(7,80)
0.358
(9,09)
28
0.442
(11,23)
0.458
(11,63)
0.406
(10,31)
0.458
(11,63)
21
9
22
8
44
0.640
(16,26)
0.660
(16,76)
0.495
(12,58)
0.560
(14,22)
23
7
52
0.739
(18,78)
0.761
(19,32)
0.495
(12,58)
0.560
(14,22)
24
6
68
0.938
(23,83)
0.962
(24,43)
0.850
(21,6)
0.858
(21,8)
84
1.141
(28,99)
1.165
(29,59)
1.047
(26,6)
1.063
(27,0)
B SQ
A SQ
25
5
26
27
28
1
2
3
4
0.080 (2,03)
0.064 (1,63)
0.020 (0,51)
0.010 (0,25)
0.020 (0,51)
0.010 (0,25)
0.055 (1,40)
0.045 (1,14)
0.045 (1,14)
0.035 (0,89)
0.045 (1,14)
0.035 (0,89)
0.028 (0,71)
0.022 (0,54)
0.050 (1,27)
4040140 / D 10/96
NOTES: A.
B.
C.
D.
E.
All linear dimensions are in inches (millimeters).
This drawing is subject to change without notice.
This package can be hermetically sealed with a metal lid.
The terminals are gold plated.
Falls within JEDEC MS-004
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MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
DB (R-PDSO-G**)
PLASTIC SMALL-OUTLINE
28 PINS SHOWN
0,38
0,22
0,65
28
0,15 M
15
0,25
0,09
8,20
7,40
5,60
5,00
Gage Plane
1
14
0,25
A
0°–ā8°
0,95
0,55
Seating Plane
2,00 MAX
0,10
0,05 MIN
PINS **
14
16
20
24
28
30
38
A MAX
6,50
6,50
7,50
8,50
10,50
10,50
12,90
A MIN
5,90
5,90
6,90
7,90
9,90
9,90
12,30
DIM
4040065 /E 12/01
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0,15.
Falls within JEDEC MO-150
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MECHANICAL DATA
MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999
PW (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PINS SHOWN
0,30
0,19
0,65
14
0,10 M
8
0,15 NOM
4,50
4,30
6,60
6,20
Gage Plane
0,25
1
7
0°– 8°
A
0,75
0,50
Seating Plane
0,15
0,05
1,20 MAX
PINS **
0,10
8
14
16
20
24
28
A MAX
3,10
5,10
5,10
6,60
7,90
9,80
A MIN
2,90
4,90
4,90
6,40
7,70
9,60
DIM
4040064/F 01/97
NOTES: A.
B.
C.
D.
All linear dimensions are in millimeters.
This drawing is subject to change without notice.
Body dimensions do not include mold flash or protrusion not to exceed 0,15.
Falls within JEDEC MO-153
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