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74F251A PDF даташит

Спецификация 74F251A изготовлена ​​​​«Philips» и имеет функцию, называемую «8-input multiplexer 3-State».

Детали детали

Номер произв 74F251A
Описание 8-input multiplexer 3-State
Производители Philips
логотип Philips логотип 

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74F251A Даташит, Описание, Даташиты
Philips Semiconductors
8-input multiplexer (3-State)
Product specification
74F251A
FEATURES
High speed 8-to-1 multiplexing
On chip decoding
Multifunction capability
Inverting and Non-Inverting outputs
Both outputs are 3-State for further multiplexer expansion
DESCRIPTION
The 74F251A is a logic implementation of a single 8-position switch
with the switch position controlled by the state of three Select (S0,
S1, S2) inputs. True (Y) and complementary (Y) outputs are both
provided. The output enable (OE) is active Low. When OE is High,
both outputs are in High impedance state, allowing multiple output
connections to a common bus without driving nor loading the bus
significantly. All but one device must be in High impedance state to
avoid high currents that would exceed the maximum ratings when
the outputs of the 3-State devices are tied together. When the output
of more than one device is tied together the user must ensure that
there is no overlap in the active Low portion of the output enable
voltages.
PIN CONFIGURATION
I3 1
I2 2
I1 3
I0 4
Y5
Y6
OE 7
GND 8
16 VCC
15 I4
14 I5
13 I6
12 I7
11 S0
10 S1
9 S2
SF00778
TYPE
74F251A
TYPICAL
PROPAGATION
DELAY
4.5ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
19mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION
16-pin plastic DIP
COMMERCIAL RANGE
VCC = 5V ±10%,
Tamb = 0°C to +70°C
N74F251AN
16-pin plastic SO
N74F251AD
PKG
DWG #
SOT38-4
SOT162-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F (U.L.) HIGH/LOW
I0–I7
Data inputs
1.0/1.0
S0–S2
Select inputs
1.0/1.0
OE Output Enable input (active Low)
1.0/1.0
Y, Y Data outputs
150/40
NOTE:
One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOAD VALUE HIGH/LOW
20µA/0.6mA
20µA/0.6mA
20µA/0.6mA
3mA/24mA
LOGIC SYMBOL
IEC/IEEE SYMBOL
4 3 2 1 15 14 13 12
I0 I1 I2 I3 I4 I5 I6 I7
11 S0
10 S1
9 S2
7 OE
YY
VCC = Pin 16
GND = Pin 8
56
SF00779
7
MUX
EN
11
0
10
9
G
0
7
2
4
3
2
1
15
14
13
12
5
6
SF00780
1996 Jan 05
1 853–0358 16191









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74F251A Даташит, Описание, Даташиты
Philips Semiconductors
8-input multiplexer (3-State)
Product specification
74F251A
LOGIC DIAGRAM
11
S0
10
S1
9
S2
7
OE
I0
I1 I2
I3 I4
I5 I6
I7
4 3 2 1 15 14 13 12
VCC = Pin 16
GND = Pin 8
FUNCTION TABLE
INPUTS
S2 S1 S0
XXX
LLL
L LH
LHL
L HH
HL L
HLH
HH L
HHH
NOTES:
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance “off” state
OE
H
L
L
L
L
L
L
L
L
OUTPUTS
YY
ZZ
I0 I0
I1 I1
I2 I2
I3 I3
I4 I4
I5 I5
I6 I6
I7 I7
56
YY
1996 Jan 05
2
SF00781









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74F251A Даташит, Описание, Даташиты
Philips Semiconductors
8-input multiplexer (3-State)
Product specification
74F251A
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
SYMBOL
PARAMETER
VCC
VIN
IIN
VOUT
IOUT
Tamb
Tstg
Supply voltage
Input voltage
Input current
Voltage applied to output in High output state
Current applied to output in Low output state
Operating free-air temperature range
Storage temperature
RATING
–0.5 to +7.0
–0.5 to +7.0
–30 to +5
–0.5 to VCC
48
0 to +70
–65 to +150
UNIT
V
V
mA
V
mA
°C
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
VCC
VIH
VIL
IIK
IOH
IOL
Tamb
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature range
LIMITS
MIN
NOM
MAX
4.5 5.0 5.5
2.0
0.8
–18
–3
24
0 70
UNIT
V
V
V
mA
mA
mA
°C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
MIN TYP2 MAX
UNIT
VOH High-level output voltage
VOL Low-level output voltage
VCC = MIN, VIL = MAX,
VIH = MIN, IOH = MAX
VCC = MIN, VIL = MAX,
VIH = MIN, IOL = MAX
±10%VCC
±5%VCC
±10%VCC
±5%VCC
2.4
2.7
3.3
0.35 0.50
0.35 0.50
V
V
V
V
VIK Input clamp voltage
VCC = MIN, II = IIK
II
Input current at maximum input
voltage
VCC = MAX, VI = 7.0V
–0.73
–1.2
100
V
µA
IIH
IIL
IOZH
High-level input current
Low-level input current
Off-state output current
High-level voltage applied
VCC = MAX, VI = 2.7V
VCC = MAX, VI = 0.5V
VCC = MAX, VI = 2.7V
20 µA
–0.6 mA
50 µA
IOZL
Off-state output current
Low-level voltage applied
VCC = MAX, VI = 0.5V
–50 mA
IOS Short-circuit output current3
VCC = MAX
–60 –150 mA
ICCH
20 27 mA
ICC
Supply current (total) ICCL
VCC = MAX
17 24 mA
ICCZ
21 29 mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
1996 Jan 05
3










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