74AHC257; 74AHCT257
Quad 2-input multiplexer; 3-state
Rev. 3 — 30 August 2023
Product data sheet
1. General description
The 74AHC257; 74AHCT257 is a quad 2-input multiplexer with 3-state outputs. Inputs are
overvoltage tolerant. This feature allows the use of these devices as translators in mixed voltage
environments.
2. Features and benefits
•
•
•
•
•
•
•
•
•
•
•
Balanced propagation delays
All inputs have Schmitt-trigger actions
Non-inverting data path
Wide supply voltage range from 2.0 V to 5.5 V
Input levels:
• For 74AHC257: CMOS level
• For 74AHCT257: TTL level
Overvoltage tolerant inputs to 5.5 V
High noise immunity
CMOS low power dissipation
Latch-up performance exceeds 100 mA per JESD 78 Class II Level A
ESD protection:
• HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
• CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range Name
Description
Version
74AHC257D
74AHCT257D
-40 °C to +125 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74AHC257PW
74AHCT257PW
-40 °C to +125 °C
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
4. Functional diagram
2
3
1I0 1I1
1 S
6
11
2I0 2I1
10
3I0 3I1
14
13
4I0 4I1
SELECTOR
15 OE
Fig. 1.
5
3-STATE MULTIPLEXER OUTPUTS
1Y
2Y
3Y
4Y
4
7
9
12
mgr280
Functional diagram
1
15
1
2
1I0
3
1I1
5
2I0
6
2I1
11
3I0
10
3I1
14
4I0
13
4I1
15
OE
S
2
1Y
2Y
4
3
G1
EN
1
Logic symbol
74AHC_AHCT257
Product data sheet
4
1
5
7
7
6
3Y
9
11
9
10
4Y
12
14
12
13
mga835
Fig. 2.
MUX
001aad467
Fig. 3.
IEC logic symbol
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
2 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
1I0
1Y
1I1
2I0
2Y
2I1
3I0
3Y
3I1
4I0
4Y
4I1
OE
S
Fig. 4.
001aad468
Logic diagram
5. Pinning information
5.1. Pinning
D package
SOT109-1 (SO16)
S
1
16 VCC
1I0
2
15 OE
1I1
3
14 4I0
1Y
2I0
2I1
4
13 4I1
5
12 4Y
6
2Y
7
GND
8
11 3I0
10 3I1
9
3Y
PW package
SOT403-1 (TSSOP16)
S
1
16 VCC
1I0
2
15 OE
1I1
3
14 4I0
1Y
4
13 4I1
2I0
5
12 4Y
2I1
6
11 3I0
2Y
7
10 3I1
GND
8
Product data sheet
3Y
aaa-035353
aaa-035352
74AHC_AHCT257
9
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
3 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
5.2. Pin description
Table 2. Pin description
Symbol
Pin
Description
S
1
common data select input
1I0
2
data input from source 0
1I1
3
data input from source 1
1Y
4
multiplexer output
2I0
5
data input from source 0
2I1
6
data input from source 1
2Y
7
multiplexer output
GND
8
ground (0 V)
3Y
9
multiplexer output
3I1
10
data input from source 1
3I0
11
data input from source 0
4Y
12
multiplexer output
4I1
13
data input from source 1
4I0
14
data input from source 0
OE
15
output enable input (active LOW)
VCC
16
supply voltage
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
Control
Output
Input
OE
S
nI0
nI1
nY
H
X
X
X
Z
L
H
X
L
L
X
H
H
L
X
L
H
X
H
L
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
4 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
VCC
Min
Max
Unit
supply voltage
-0.5
+7.0
V
VI
input voltage
-0.5
+7.0
V
IIK
input clamping current
VI < -0.5 V
[1]
-20
-
mA
IOK
output clamping current
VO < -0.5 V or VO > VCC + 0.5 V
[1]
-20
+20
mA
IO
output current
VO = -0.5 V to (VCC + 0.5 V)
-25
+25
mA
ICC
supply current
-
+75
mA
IGND
ground current
-75
-
mA
Tstg
storage temperature
-65
+150
°C
Ptot
total power dissipation
-
500
mW
[1]
[2]
Conditions
Tamb = -40 °C to +125 °C
[2]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SOT109-1 (SO16) package: Ptot derates linearly with 12.4 mW/K above 110 °C.
For SOT403-1 (TSSOP16) package: Ptot derates linearly with 8.5 mW/K above 91 °C.
8. Recommended operating conditions
Table 5. Operating conditions
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
2.0
5.0
5.5
V
74AHC257
VCC
supply voltage
VI
input voltage
0
-
5.5
V
VO
output voltage
0
-
VCC
V
Tamb
ambient temperature
Δt/ΔV
input transition rise and fall rate
-40
+25
+125
°C
VCC = 3.0 V to 3.6 V
-
-
100
ns/V
VCC = 4.5 V to 5.5 V
-
-
20
ns/V
4.5
5.0
5.5
V
74AHCT257
VCC
supply voltage
VI
input voltage
0
-
5.5
V
VO
output voltage
0
-
VCC
V
Tamb
ambient temperature
-40
+25
+125
°C
Δt/ΔV
input transition rise and fall rate
-
-
20
74AHC_AHCT257
Product data sheet
VCC = 4.5 V to 5.5 V
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
ns/V
Nexperia B.V. 2023. All rights reserved
5 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C
-40 °C to +125 °C
Unit
Min
Typ
Max
Min
Max
Min
Max
VCC = 2.0 V
1.5
-
-
1.5
-
1.5
-
V
VCC = 3.0 V
2.1
-
-
2.1
-
2.1
-
V
VCC = 5.5 V
3.85
-
-
3.85
-
3.85
-
V
VCC = 2.0 V
-
-
0.5
-
0.5
-
0.5
V
VCC = 3.0 V
-
-
0.9
-
0.9
-
0.9
V
74AHC257
VIH
VIL
VOH
VOL
HIGH-level
input voltage
LOW-level
input voltage
VCC = 5.5 V
-
-
1.65
-
1.65
-
1.65
V
VI = VIH or VIL
HIGH-level
output voltage
IO = -50 μA; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = -50 μA; VCC = 3.0 V
2.9
3.0
-
2.9
-
2.9
-
V
IO = -50 μA; VCC = 4.5 V
4.4
4.5
-
4.4
-
4.4
-
V
IO = -4.0 mA; VCC = 3.0 V
2.58
-
-
2.48
-
2.40
-
V
IO = -8.0 mA; VCC = 4.5 V
3.94
-
-
3.80
-
3.70
-
V
VI = VIH or VIL
LOW-level
output voltage
IO = 50 μA; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 μA; VCC = 3.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 μA; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 4.0 mA; VCC = 3.0 V
-
-
0.36
-
0.44
-
0.55
V
IO = 8.0 mA; VCC = 4.5 V
-
-
0.36
-
0.44
-
0.55
V
II
input leakage
current
VI = 5.5 V or GND;
VCC = 0 V to 5.5 V
-
-
0.1
-
1.0
-
2.0
μA
IOZ
OFF-state
VI = VIH or VIL;
output current VO = VCC or GND;
VCC = 5.5 V
-
-
±0.25
-
±2.5
-
±10.0
μA
ICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
4.0
-
40
-
80
μA
CI
input
capacitance
-
3
10
-
10
-
10
pF
CO
output
capacitance
-
4
-
-
-
-
-
pF
VI = VCC or GND
74AHCT257
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
2.0
-
-
2.0
-
2.0
-
V
VIL
LOW-level
input voltage
VCC = 4.5 V to 5.5 V
-
-
0.8
-
0.8
-
0.8
V
VOH
VI = VIH or VIL; VCC = 4.5 V
HIGH-level
output voltage
IO = -50 μA
4.4
4.5
-
4.4
-
4.4
-
V
3.94
-
-
3.80
-
3.70
-
V
-
0
0.1
-
0.1
-
0.1
V
-
-
0.36
-
0.44
-
0.55
V
IO = -8.0 mA
VOL
VI = VIH or VIL; VCC = 4.5 V
LOW-level
output voltage
IO = 50 μA
IO = 8.0 mA
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
6 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
Symbol Parameter
Conditions
25 °C
-40 °C to +85 °C
-40 °C to +125 °C
Min
Typ
Max
Min
Max
Min
Max
Unit
II
input leakage
current
VI = 5.5 V or GND;
VCC = 0 V to 5.5 V
-
-
0.1
-
1.0
-
2.0
μA
IOZ
OFF-state
VI = VIH or VIL;
output current VO = VCC or GND;
VCC = 5.5 V
-
-
±0.25
-
±2.5
-
±10.0
μA
ICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
4.0
-
40
-
80
μA
ΔICC
additional
per input pin;
supply current VI = VCC − 2.1 V;
other pins at VCC or GND;
IO = 0 A; VCC = 4.5 V to 5.5 V
-
-
1.35
-
1.5
-
1.5
mA
CI
input
capacitance
-
3
10
-
10
-
10
pF
CO
output
capacitance
-
4
-
-
-
-
-
pF
VI = VCC or GND
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Fig. 7.
Symbol Parameter
Conditions
25 °C
Min
-40 °C to +85 °C -40 °C to +125 °C Unit
Typ [1] Max
Min
Max
Min
Max
74AHC257
tpd
propagation nI0, nI1 to nY; see Fig. 5
delay
VCC = 3.0 V to 3.6 V
[2]
CL = 15 pF
-
4.2
9.3
1.0
11.0
1.0
12.0
ns
CL = 50 pF
-
6.0
12.8
1.0
14.5
1.0
16.0
ns
-
2.9
5.9
1.0
7.0
1.0
7.5
ns
-
4.2
7.9
1.0
9.0
1.0
11.5
ns
CL = 15 pF
-
5.2
11.0
1.0
13.0
1.0
14.0
ns
CL = 50 pF
-
7.4
14.5
1.0
16.5
1.0
18.5
ns
CL = 15 pF
-
3.5
6.8
1.0
8.0
1.0
8.5
ns
CL = 50 pF
-
5.0
8.8
1.0
10.0
1.0
12.5
ns
CL = 15 pF
-
4.5
10.5
1.0
12.5
1.0
13.5
ns
CL = 50 pF
-
6.4
14.0
1.0
16.0
1.0
17.5
ns
CL = 15 pF
-
3.2
6.8
1.0
8.0
1.0
8.5
ns
CL = 50 pF
-
4.5
8.8
1.0
10.0
1.0
12.5
ns
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
S to nY; see Fig. 5
[2]
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
ten
enable time
OE to nY; see Fig. 6
[3]
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
7 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
Symbol Parameter
Conditions
25 °C
Min
disable time OE to nY; see Fig. 6
tdis
-40 °C to +85 °C -40 °C to +125 °C Unit
Typ [1] Max
Min
Max
Min
Max
[4]
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
5.1
9.5
1.0
11.0
1.0
11.5
ns
CL = 50 pF
-
7.2
12.0
1.0
13.5
1.0
14.5
ns
-
3.4
6.5
1.0
7.0
1.0
8.5
ns
-
4.9
7.9
1.0
9.0
1.0
9.5
ns
-
45
-
-
-
-
-
pF
-
15
-
-
-
-
-
pF
-
3.7
6.5
1.0
8.0
1.0
9.0
ns
-
4.9
8.5
1.0
10.0
1.0
11.0
ns
CL = 15 pF
-
5.1
9.0
1.0
10.5
1.0
11.5
ns
CL = 50 pF
-
6.4
10.5
1.0
12.5
1.0
13.5
ns
CL = 15 pF
-
3.9
8.0
1.0
9.0
1.0
10.0
ns
CL = 50 pF
-
5.1
10.0
1.0
11.0
1.0
12.0
ns
-
4.5
7.5
1.0
8.0
1.0
8.5
ns
-
6.5
9.5
1.0
10.5
1.0
11.5
ns
-
51
-
-
-
-
-
pF
-
15
-
-
-
-
-
pF
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
fi = 1 MHz;
power
VI = GND to VCC
dissipation
capacitance
4 outputs switching via
input S
CPD
[5]
1 output switching via
input I
74AHCT257; VCC = 4.5 V to 5.5 V
propagation nI0, nI1 to nY; see Fig. 5
delay
CL = 15 pF
tpd
[2]
CL = 50 pF
S to nY; see Fig. 5
ten
enable time
[2]
OE to nY; see Fig. 6
[3]
disable time OE to nY; see Fig. 6
tdis
[4]
CL = 15 pF
CL = 50 pF
fi = 1 MHz;
power
VI = GND to VCC
dissipation
capacitance
4 outputs switching via
input S
CPD
1 output switching via
input I
[1]
[2]
[3]
[4]
[5]
[5]
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
tpd is the same as tPLH and tPHL.
ten is the same as tPZL and tPZH.
tdis is the same as tPLZ and tPHZ.
CPD is used to determine the dynamic power dissipation (PD in μW).
2
2
PD = CPD × VCC × fi × N + Σ(CL × VCC × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
2
Σ(CL × VCC × fo) = sum of the outputs.
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
8 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
10.1. Waveforms and test circuit
VI
nI0, nI1, S
VM
input
GND
t PHL
t PLH
VOH
VM
nY output
mna486
VOL
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 5.
Data inputs and common data select input to output propagation delays
VI
OE input
VM
GND
t PLZ
Qn output
LOW-to-OFF
OFF-to-LOW
t PZL
VCC
VM
VX
VOL
t PZH
t PHZ
Qn output
HIGH-to-OFF
OFF-to-HIGH
VOH
VY
VM
GND
outputs
enabled
outputs
enabled
outputs
disabled
mna813
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 6.
Enable and disable times
Table 8. Measurement points
Input
Type
Output
VM
VM
VX
VY
74AHC257
0.5 × VCC
0.5 × VCC
VOL + 0.3 V
VOH - 0.3 V
74AHCT257
1.5 V
0.5 × VCC
VOL + 0.3 V
VOH - 0.3 V
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
9 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
VI
negative
pulse
tW
90 %
VM
0V
VI
positive
pulse
0V
VM
10 %
tf
tr
tr
tf
90 %
VM
VM
10 %
tW
VCC
G
VI
DUT
VCC
VO
RT
RL
S1
open
CL
001aad983
Test data is given in Table 9.
Definitions test circuit:
RT = termination resistance should be equal to output impedance Zo of the pulse generator;
CL = load capacitance including jig and probe capacitance;
RL = load resistance;
S1 = test selection switch.
Fig. 7.
Test circuit for measuring switching times
Table 9. Test data
Type
Input
Load
S1 position
VI
tr, tf
CL
RL
tPHL, tPLH
tPZH, tPHZ
tPZL, tPLZ
74AHC257
VCC
≤ 3.0 ns
15 pF, 50 pF
1 kΩ
open
GND
VCC
74AHCT257
3.0 V
≤ 3.0 ns
15 pF, 50 pF
1 kΩ
open
GND
VCC
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
10 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
11. Package outline
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A
X
c
y
HE
v M A
Z
16
9
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
8
e
w M
bp
0
2.5
detail X
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
1.75
0.25
0.10
1.45
1.25
0.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
1.27
6.2
5.8
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.05
0.039
0.016
0.028
0.020
0.01
0.01
0.004
0.028
0.012
0.244
0.041
0.228
θ
o
8
o
0
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
Fig. 8.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT109-1
076E07
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Package outline SOT109-1 (SO16)
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
11 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
D
SOT403-1
E
A
X
c
y
HE
v M A
Z
9
16
Q
A2
pin 1 index
(A 3 )
A1
A
θ
Lp
1
L
8
detail X
w M
bp
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.40
0.06
8o
0o
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT403-1
Fig. 9.
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
MO-153
Package outline SOT403-1 (TSSOP16)
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
12 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
12. Abbreviations
Table 10. Abbreviations
Acronym
Description
CDM
Charged Device Model
CMOS
Complementary Metal-Oxide Semiconductor
DUT
Device Under Test
ESD
ElectroStatic Discharge
HBM
Human Body Model
TTL
Transistor-Transistor Logic
13. Revision history
Table 11. Revision history
Document ID
Release date
Data sheet status
Change notice Supersedes
74AHC_AHCT257 v.3
20230830
Product data sheet
-
Modifications:
•
•
•
•
•
The format of this data sheet has been redesigned to comply with the identity
guidelines of Nexperia.
Legal texts have been adapted to the new company name where appropriate.
Section 1 updated.
Section 2: ESD specification updated according to the latest JEDEC standard.
Section 7: Derating values for Ptot total power dissipation updated.
74AHC_AHCT257 v.2
20080509
Modifications:
•
•
•
74AHC_AHCT257 v.1
74AHC_AHCT257
Product data sheet
74AHC_AHCT257 v.2
Product data sheet
-
74AHC_AHCT257 v.1
The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
Legal texts have been adapted to the new company name where appropriate.
Table 6: the conditions for input leakage current have been changed.
20000403
Product specification
-
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
-
©
Nexperia B.V. 2023. All rights reserved
13 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
14. Legal information
injury, death or severe property or environmental damage. Nexperia and its
suppliers accept no liability for inclusion and/or use of Nexperia products in
such equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.
Data sheet status
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Document status
[1][2]
Product
status [3]
Definition
Objective [short]
data sheet
Development
This document contains data from
the objective specification for
product development.
Preliminary [short]
data sheet
Qualification
This document contains data from
the preliminary specification.
Product [short]
data sheet
Production
This document contains the product
specification.
[1]
[2]
[3]
Please consult the most recently issued document before initiating or
completing a design.
The term 'short data sheet' is explained in section "Definitions".
The product status of device(s) described in this document may have
changed since this document was published and may differ in case of
multiple devices. The latest product status information is available on
the internet at https://www.nexperia.com.
Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included herein
and shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is
intended for quick reference only and should not be relied upon to contain
detailed and full information. For detailed and full information see the relevant
full data sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and customer have explicitly
agreed otherwise in writing. In no event however, shall an agreement be
valid in which the Nexperia product is deemed to offer functions and qualities
beyond those described in the Product data sheet.
Disclaimers
Limited warranty and liability — Information in this document is believed
to be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy
or completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no responsibility
for the content in this document if provided by an information source outside
of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal
or replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with the
Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make changes
to information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-critical
systems or equipment, nor in applications where failure or malfunction
of an Nexperia product can reasonably be expected to result in personal
74AHC_AHCT257
Product data sheet
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia accepts no liability for
any assistance with applications or customer product design. It is customer’s
sole responsibility to determine whether the Nexperia product is suitable
and fit for the customer’s applications and products planned, as well as
for the planned application and use of customer’s third party customer(s).
Customers should provide appropriate design and operating safeguards to
minimize the risks associated with their applications and products.
Nexperia does not accept any liability related to any default, damage, costs
or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for the
customer’s applications and products using Nexperia products in order to
avoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Nexperia does not accept any
liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those
given in the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia products are
sold subject to the general terms and conditions of commercial sale, as
published at http://www.nexperia.com/profile/terms, unless otherwise agreed
in a valid written individual agreement. In case an individual agreement is
concluded only the terms and conditions of the respective agreement shall
apply. Nexperia hereby expressly objects to applying the customer’s general
terms and conditions with regard to the purchase of Nexperia products by
customer.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified, the
product is not suitable for automotive use. It is neither qualified nor tested in
accordance with automotive testing or application requirements. Nexperia
accepts no liability for inclusion and/or use of non-automotive qualified
products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards,
customer (a) shall use the product without Nexperia’s warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
Nexperia’s specifications such use shall be solely at customer’s own risk,
and (c) customer fully indemnifies Nexperia for any liability, damages or failed
product claims resulting from customer design and use of the product for
automotive applications beyond Nexperia’s standard warranty and Nexperia’s
product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Trademarks
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
14 / 15
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
Contents
1. General description...................................................... 1
2. Features and benefits.................................................. 1
3. Ordering information....................................................1
4. Functional diagram.......................................................2
5. Pinning information......................................................3
5.1. Pinning.........................................................................3
5.2. Pin description............................................................. 4
6. Functional description................................................. 4
7. Limiting values............................................................. 5
8. Recommended operating conditions..........................5
9. Static characteristics....................................................6
10. Dynamic characteristics............................................ 7
10.1. Waveforms and test circuit........................................ 9
11. Package outline........................................................ 11
12. Abbreviations............................................................ 13
13. Revision history........................................................13
14. Legal information......................................................14
©
Nexperia B.V. 2023. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 30 August 2023
74AHC_AHCT257
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 30 August 2023
©
Nexperia B.V. 2023. All rights reserved
15 / 15