74AHC257PW [NEXPERIA]
Quad 2-input multiplexer; 3-stateProduction;
| 型号： | 74AHC257PW |
| 厂家： | 
Nexperia |
| 描述： | Quad 2-input multiplexer; 3-stateProduction 光电二极管 逻辑集成电路 |
| 文件： | 总16页 (文件大小：596K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
74AHC257; 74AHCT257
Quad 2-input multiplexer; 3-state
Rev. 02 — 9 May 2008
Product data sheet
1. General description
The 74AHC257; 74AHCT257 is a high-speed Si-gate CMOS device and is pin compatible
with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7-A.
The 74AHC257; 74AHCT257 has four identical 2-input multiplexers with 3-state outputs,
which select 4 bits of data from two sources and are controlled by a common data select
input (S). The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and
the data inputs from source 1 (1I1 to 4I1) are selected when input S is HIGH. Data
appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs.
The 74AHC257; 74AHCT257 is the logic implementation of a 4-pole 2-position switch,
where the position of the switch is determined by the logic levels applied to input S. The
outputs are forced to a high-impedance OFF-state when OE is HIGH.
The logic equations for the outputs are:
1Y = OE × (1I1 × S + 1I0 × S)
2Y = OE × (2I1 × S + 2I0 × S)
3Y = OE × (3I1 × S + 3I0 × S)
4Y = OE × (4I1 × S + 4I0 × S)
The 74AHC257; 74AHCT257 is identical to the 74AHC258; 74AHCT258, but has
non-inverting (true) outputs.
2. Features
I Balanced propagation delays
I All inputs have Schmitt-trigger actions
I Non-inverting data path
I Inputs accept voltages higher than VCC
I Input levels:
N For 74AHC257: CMOS level
N For 74AHCT257: TTL level
I ESD protection:
N HBM EIA/JESD22-A114E exceeds 2000 V
N MM EIA/JESD22-A115-A exceeds 200 V
N CDM EIA/JESD22-C101C exceeds 1000 V
I Multiple package options
I Specified from −40 °C to +85 °C and from −40 °C to +125 °C
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
3. Ordering information
Table 1.
Ordering information
Type number
Package
Temperature range Name
Description
Version
74AHC257
74AHC257D
−40 °C to +125 °C
−40 °C to +125 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
SOT403-1
74AHC257PW
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
74AHCT257
74AHCT257D
−40 °C to +125 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
SOT403-1
74AHCT257PW −40 °C to +125 °C
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
4. Functional diagram
2
3
5
6
11 10
3I0 3I1
14 13
4I0 4I1
1I0 1I1
2I0 2I1
1
S
SELECTOR
15 OE
3-STATE MULTIPLEXER OUTPUTS
1Y
4
2Y
7
3Y
9
4Y
12
mgr280
Fig 1. Functional diagram
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
2 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
1
G1
15
EN
1
S
2
1I0
1I1
MUX
1
1
2
3
4
7
1Y
2Y
3Y
4Y
4
3
5
2I0
2I1
5
6
7
6
3I0
3I1
11
10
9
11
10
14
13
9
4I0
4I1
14
13
12
12
15
OE
001aad467
mga835
Fig 2. Logic symbol
Fig 3. IEC logic symbol
1I0
1Y
2Y
3Y
4Y
1I1
2I0
2I1
3I0
3I1
4I0
4I1
OE
S
001aad468
Fig 4. Logic diagram
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
3 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
5. Pinning information
5.1 Pinning
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
S
1I0
OE
4I0
4I1
4Y
1I1
1Y
257
2I0
2I1
3I0
3I1
3Y
2Y
GND
001aad499
Fig 5. Pin configuration SO16 and TSSOP16
5.2 Pin description
Table 2.
Symbol
S
Pin description
Pin
1
Description
common data select input
data input from source 0
data input from source 1
multiplexer output
1I0
2
1I1
3
1Y
4
2I0
5
data input from source 0
data input from source 1
multiplexer output
2I1
6
2Y
7
GND
3Y
8
ground (0 V)
9
multiplexer output
3I1
10
11
12
13
14
15
16
data input from source 1
data input from source 0
multiplexer output
3I0
4Y
4I1
data input from source 1
data input from source 0
4I0
OE
output enable input (active LOW)
supply voltage
VCC
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
4 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
6. Functional description
Table 3.
Function table[1]
Control
Input
nI0
X
Output
OE
H
S
X
H
nI1
X
nY
Z
L
X
L
L
X
H
X
H
L
L
L
H
X
H
[1] H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-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
VCC
VI
Parameter
Conditions
Min
−0.5
−0.5
−20
−20
−25
-
Max
+7.0
+7.0
-
Unit
V
supply voltage
input voltage
V
[1]
[1]
IIK
input clamping current
output clamping current
output current
VI < −0.5 V
mA
mA
mA
mA
mA
°C
IOK
VO < −0.5 V or VO > VCC + 0.5 V
VO = −0.5 V to (VCC + 0.5 V)
+20
+25
+75
-
IO
ICC
supply current
IGND
Tstg
Ptot
ground current
−75
−65
-
storage temperature
total power dissipation
+150
500
[2]
Tamb = −40 °C to +125 °C
mW
[1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2] For SO16 packages: above 70 °C the value of Ptot derates linearly at 8 mW/K.
For TSSOP16 packages: above 60 °C the value of Ptot derates linearly at 5.5 mW/K.
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
5 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
8. Recommended operating conditions
Table 5.
Symbol
74AHC257
VCC
Operating conditions
Parameter
Conditions
Min
Typ
Max
Unit
supply voltage
2.0
5.0
5.5
V
VI
input voltage
0
-
5.5
V
VO
output voltage
0
-
VCC
+125
100
20
V
Tamb
ambient temperature
input transition rise and fall rate
−40
+25
°C
ns/V
ns/V
∆t/∆V
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
-
-
-
-
74AHCT257
VCC
VI
supply voltage
4.5
0
5.0
5.5
V
input voltage
-
5.5
V
VO
output voltage
0
-
VCC
+125
20
V
Tamb
∆t/∆V
ambient temperature
input transition rise and fall rate
−40
-
+25
-
°C
ns/V
VCC = 4.5 V to 5.5 V
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
74AHC257
VIH
HIGH-level
input voltage
VCC = 2.0 V
1.5
-
-
-
-
-
-
-
-
1.5
-
-
1.5
-
-
V
V
V
V
V
V
VCC = 3.0 V
2.1
2.1
2.1
VCC = 5.5 V
3.85
-
3.85
-
3.85
-
VIL
LOW-level
input voltage
VCC = 2.0 V
-
-
-
0.5
0.9
1.65
-
-
-
0.5
0.9
1.65
-
-
-
0.5
0.9
1.65
VCC = 3.0 V
VCC = 5.5 V
VOH
HIGH-level
VI = VIH or VIL
output voltage
IO = −50 µA; VCC = 2.0 V
IO = −50 µA; VCC = 3.0 V
IO = −50 µA; VCC = 4.5 V
IO = −4.0 mA; VCC = 3.0 V
IO = −8.0 mA; VCC = 4.5 V
VI = VIH or VIL
1.9
2.9
2.0
3.0
4.5
-
-
-
-
-
-
1.9
2.9
-
-
-
-
-
1.9
2.9
-
-
-
-
-
V
V
V
V
V
4.4
4.4
4.4
2.58
3.94
2.48
3.80
2.40
3.70
-
VOL
LOW-level
output voltage
IO = 50 µA; VCC = 2.0 V
IO = 50 µA; VCC = 3.0 V
IO = 50 µA; VCC = 4.5 V
IO = 4.0 mA; VCC = 3.0 V
IO = 8.0 mA; VCC = 4.5 V
-
-
-
-
-
0
0
0
-
0.1
0.1
-
-
-
-
-
0.1
0.1
-
-
-
-
-
0.1
0.1
V
V
V
V
V
0.1
0.1
0.1
0.36
0.36
0.44
0.44
0.55
0.55
-
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
6 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
Table 6.
Static characteristics …continued
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
II
input leakage VI = 5.5 V or GND;
-
-
0.1
-
1.0
-
2.0
µA
µA
current
V
CC = 0 V to 5.5 V
IOZ
OFF-state
VI = VIH or VIL;
-
-
±0.25
-
±2.5
-
±10.0
output current VO = VCC or GND;
CC = 5.5 V
V
ICC
CI
supply current VI = VCC or GND; IO = 0 A;
CC = 5.5 V
-
-
-
-
4.0
10
-
-
-
-
40
10
-
-
-
-
80
10
-
µA
pF
pF
V
input
VI = VCC or GND
3
4
capacitance
CO
output
capacitance
74AHCT257
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
2.0
-
-
-
-
2.0
-
-
2.0
-
-
V
V
VIL
LOW-level
0.8
0.8
0.8
input voltage
VOH
HIGH-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = −50 µA
4.4
4.5
-
-
-
4.4
-
-
4.4
-
-
V
V
IO = −8.0 mA
3.94
3.80
3.70
VOL
LOW-level
output voltage
VI = VIH or VIL; VCC = 4.5 V
IO = 50 µA
-
-
-
0
-
0.1
0.36
0.1
-
-
-
0.1
0.44
1.0
-
-
-
0.1
0.55
2.0
V
IO = 8.0 mA
V
II
input leakage VI = 5.5 V or GND;
-
µA
current
V
CC = 0 V to 5.5 V
IOZ
OFF-state
VI = VIH or VIL;
-
-
±0.25
-
±2.5
-
±10.0
µA
output current VO = VCC or GND per input
pin; other inputs at
V
V
CC or GND; IO = 0 A;
CC = 5.5 V
ICC
supply current VI = VCC or GND; IO = 0 A;
CC = 5.5 V
-
-
-
-
4.0
-
-
40
-
-
80
µA
V
∆ICC
additional
per input pin;
supply current VI = VCC − 2.1 V;
other pins at VCC or GND;
1.35
1.5
1.5
mA
IO = 0 A; VCC = 4.5 V to 5.5 V
CI
input
capacitance
VI = VCC or GND
-
-
3
4
10
-
-
-
10
-
-
-
10
-
pF
pF
CO
output
capacitance
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
7 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
10. Dynamic characteristics
Table 7.
Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 8.
Symbol Parameter Conditions
74AHC257
25 °C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ[1] Max Min
Max
Min
Max
[2]
[2]
[3]
[4]
[5]
tpd
propagation nI0, nI1 to nY; see Figure 6
delay
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
-
4.2
9.3
1.0
1.0
11.0
14.5
1.0
1.0
12.0
16.0
ns
ns
CL = 50 pF
6.0 12.8
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
2.9
4.2
5.9
7.9
1.0
1.0
7.0
9.0
1.0
1.0
7.5
ns
ns
CL = 50 pF
11.5
S to nY; see Figure 6
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
-
5.2 11.0
7.4 14.5
1.0
1.0
13.0
16.5
1.0
1.0
14.0
18.5
ns
ns
CL = 50 pF
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
3.5
5.0
6.8
8.8
1.0
1.0
8.0
1.0
1.0
8.5
ns
ns
CL = 50 pF
10.0
12.5
ten
enable time OE to nY; see Figure 7
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
-
4.5 10.5
6.4 14.0
1.0
1.0
12.5
16.0
1.0
1.0
13.5
17.5
ns
ns
CL = 50 pF
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
3.2
4.5
6.8
8.8
1.0
1.0
8.0
1.0
1.0
8.5
ns
ns
CL = 50 pF
10.0
12.5
tdis
disable time OE to nY; see Figure 7
VCC = 3.0 V to 3.6 V
CL = 15 pF
-
-
5.1
9.5
1.0
1.0
11.0
13.5
1.0
1.0
11.5
14.5
ns
ns
CL = 50 pF
7.2 12.0
VCC = 4.5 V to 5.5 V
CL = 15 pF
-
-
3.4
4.9
6.5
7.9
1.0
1.0
7.0
9.0
1.0
1.0
8.5
9.5
ns
ns
CL = 50 pF
CPD
power
fi = 1 MHz; VI = GND to VCC
dissipation
capacitance
4 outputs switching via
input S
-
-
45
15
-
-
-
-
-
-
-
-
-
-
pF
pF
1 output switching via
input I
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
8 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
Table 7.
Dynamic characteristics …continued
Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 8.
Symbol Parameter Conditions
25 °C
−40 °C to +85 °C −40 °C to +125 °C Unit
Min Typ[1] Max Min
Max
Min
Max
74AHCT257; VCC = 4.5 V to 5.5 V
[2]
[2]
[3]
[4]
[5]
tpd
propagation nI0, nI1 to nY; see Figure 6
delay
CL = 15 pF
CL = 50 pF
-
-
3.7
4.9
6.5
8.5
1.0
1.0
8.0
1.0
1.0
9.0
ns
ns
10.0
11.0
S to nY; see Figure 6
CL = 15 pF
-
-
5.1
9.0
1.0
1.0
10.5
12.5
1.0
1.0
11.5
13.5
ns
ns
CL = 50 pF
6.4 10.5
ten
enable time OE to nY; see Figure 7
CL = 15 pF
-
-
3.9
8.0
1.0
1.0
9.0
1.0
1.0
10.0
12.0
ns
ns
CL = 50 pF
5.1 10.0
11.0
tdis
disable time OE to nY; see Figure 7
CL = 15 pF
-
-
4.5
6.5
7.5
9.5
1.0
1.0
8.0
1.0
1.0
8.5
ns
ns
CL = 50 pF
10.5
11.5
CPD
power
fi = 1 MHz; VI = GND to VCC
dissipation
capacitance
4 outputs switching via
input S
-
-
51
15
-
-
-
-
-
-
-
-
-
-
pF
pF
1 output switching via
input I
[1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2] tpd is the same as tPLH and tPHL
[3] ten is the same as tPZL and tPZH
[4] tdis is the same as tPLZ and tPHZ
.
.
.
[5] CPD is used to determine the dynamic power dissipation (PD in µW).
PD = CPD × VCC2 × fi × N + Σ(CL × VCC2 × 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;
Σ(CL × VCC2 × fo) = sum of the outputs.
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
9 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
11. Waveforms
V
I
nI0, nI1, S
input
V
M
GND
t
t
PHL
PLH
V
OH
V
M
nY output
mna486
V
OL
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6. Data inputs and common data select input to output propagation delays
V
I
OE input
V
M
t
GND
t
PLZ
PZL
V
CC
Qn output
LOW-to-OFF
OFF-to-LOW
V
M
V
X
V
OL
t
t
PZH
PHZ
V
OH
V
Y
Qn output
V
HIGH-to-OFF
OFF-to-HIGH
M
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 7. Enable and disable times
Table 8.
Type
Measurement points
Input
Output
VM
VM
VX
VY
74AHC257
0.5 × VCC
1.5 V
0.5 × VCC
0.5 × VCC
VOL + 0.3 V
VOL + 0.3 V
V
OH − 0.3 V
74AHCT257
VOH − 0.3 V
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
10 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
t
W
V
I
90 %
negative
pulse
V
V
V
M
M
10 %
0 V
t
t
r
f
t
t
f
r
V
I
90 %
positive
pulse
V
M
M
10 %
0 V
t
W
V
CC
V
CC
V
V
O
I
R
L
S1
G
open
DUT
R
T
C
L
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 8. Test circuitry for measuring switching times
Table 9.
Type
Test data
Input
Load
S1 position
tPHL, tPLH
open
VI
tr, tf
CL
RL
tPZH, tPHZ
GND
tPZL, tPLZ
VCC
74AHC257
VCC
3.0 V
≤ 3.0 ns
≤ 3.0 ns
15 pF, 50 pF
15 pF, 50 pF
1 kΩ
1 kΩ
74AHCT257
open
GND
VCC
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
11 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
12. Package outline
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A
X
v
c
y
H
M
A
E
Z
16
9
Q
A
2
A
(A )
3
A
1
pin 1 index
θ
L
p
L
1
8
e
w
M
detail X
b
p
0
2.5
scale
5 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
A
(1)
(1)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
p
Q
v
w
y
Z
θ
1
2
3
p
E
max.
0.25
0.10
1.45
1.25
0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8
6.2
5.8
1.0
0.4
0.7
0.6
0.7
0.3
mm
1.27
0.05
1.05
0.041
1.75
0.25
0.01
0.25
0.01
0.25
0.1
8o
0o
0.010 0.057
0.004 0.049
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.244
0.228
0.039 0.028
0.016 0.020
0.028
0.012
inches
0.069
0.01 0.004
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-19
SOT109-1
076E07
MS-012
Fig 9. Package outline SOT109-1 (SO16)
74AHC_AHCT257_2
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
12 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
D
E
A
X
c
y
H
v
M
A
E
Z
9
16
Q
(A )
3
A
2
A
A
1
pin 1 index
θ
L
p
L
1
8
detail X
w
M
b
p
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
A
(1)
(2)
(1)
UNIT
A
A
A
b
c
D
E
e
H
L
L
Q
v
w
y
Z
θ
1
2
3
p
E
p
max.
8o
0o
0.15
0.05
0.95
0.80
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3
6.6
6.2
0.75
0.50
0.4
0.3
0.40
0.06
mm
1.1
0.65
0.25
1
0.2
0.13
0.1
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.
REFERENCES
OUTLINE
EUROPEAN
PROJECTION
ISSUE DATE
VERSION
IEC
JEDEC
JEITA
99-12-27
03-02-18
SOT403-1
MO-153
Fig 10. Package outline SOT403-1 (TSSOP16)
74AHC_AHCT257_2
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
13 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
13. Abbreviations
Table 10. Abbreviations
Acronym
CDM
Description
Charged Device Model
CMOS
DUT
Complementary Metal-Oxide Semiconductor
Device Under Test
ESD
ElectroStatic Discharge
Human Body Model
HBM
LSTTL
MM
Low-power Schottky Transistor-Transistor Logic
Machine Model
14. Revision history
Table 11. Revision history
Document ID
Release date
20080509
Data sheet status
Change notice
Supersedes
74AHC_AHCT257_2
Modifications:
Product data sheet
-
74AHC_AHCT257_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.
74AHC_AHCT257_1
20000403
Product specification
-
-
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
14 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
15. Legal information
15.1 Data sheet status
Document status[1][2]
Product status[3]
Development
Definition
Objective [short] data sheet
This document contains data from the objective specification for product development.
This document contains data from the preliminary specification.
This document contains the product specification.
Preliminary [short] data sheet Qualification
Product [short] data sheet Production
[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 URL http://www.nexperia.com.
malfunction of a Nexperia product can reasonably be expected
15.2 Definitions
to result in personal injury, death or severe property or environmental
damage. Nexperia accepts no liability for inclusion and/or use of
Nexperia products in such equipment or applications and
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
therefore such inclusion and/or use is at the customer’s own risk.
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.
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.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) may cause permanent
damage to the device. Limiting values are stress ratings only and operation of
the device at these or any other conditions above those given in the
Characteristics sections of this document is not implied. Exposure to limiting
values for extended periods may affect device reliability.
Terms and conditions of sale — Nexperia products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.nexperia.com/profile/terms, including those pertaining to warranty,
intellectual property rights infringement and limitation of liability, unless
explicitly otherwise agreed to in writing by Nexperia. In case of
any inconsistency or conflict between information in this document and such
terms and conditions, the latter will prevail.
15.3 Disclaimers
General — Information in this document is believed to be accurate and
reliable.However,Nexperiadoesnotgiveanyrepresentationsor
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.
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.
Right to make changes — Nexperiareservestherighttomake
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.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
Suitability for use — Nexperia products are not designed,
authorized or warranted to be suitable for use in medical, military, aircraft,
space or life support equipment, nor in applications where failure or
16. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
©
74AHC_AHCT257_2
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 02 — 9 May 2008
15 of 16
74AHC257; 74AHCT257
Nexperia
Quad 2-input multiplexer; 3-state
17. Contents
1
2
3
4
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
5
5.1
5.2
Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
6
Functional description . . . . . . . . . . . . . . . . . . . 5
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5
Recommended operating conditions. . . . . . . . 6
Static characteristics. . . . . . . . . . . . . . . . . . . . . 6
Dynamic characteristics . . . . . . . . . . . . . . . . . . 8
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 12
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 14
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 14
7
8
9
10
11
12
13
14
15
Legal information. . . . . . . . . . . . . . . . . . . . . . . 15
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 15
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
15.1
15.2
15.3
15.4
16
17
Contact information. . . . . . . . . . . . . . . . . . . . . 15
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
© Nexperia B.V. 2017. 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: 09 May 2008
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