PI74FCT257ATWX [PERICOM]
暂无描述;型号: | PI74FCT257ATWX |
厂家: | PERICOM SEMICONDUCTOR CORPORATION |
描述: | 暂无描述 复用器 |
文件: | 总5页 (文件大小:53K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
PI74FCT157T/257T
(25Ω Series)PI74FCT2157T/2257T
Fast CMOS
Quad 2-Input Multiplexer
ProductFeatures:
Product Description:
• PI74FCT157/257/2157/2257Tispincompatiblewithbipolar
FAST™ Series at a higher speed and lower power
consumption
• 25Ω series resistor on all outputs (FCT2XXX only)
• TTL input and output levels
• Low ground bounce outputs (25Ω series only)
• Extremelylowstaticpower
• Hysteresis on all inputs
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-
duced in the Company’s advanced 0.8 micron CMOS technology,
achievingindustryleadingspeedgrades.AllPI74FCT2XXXdevices
have a built-in 25-ohm series resistor on all outputs to reduce noise
because of reflections, thus eliminating the need for an external
terminating resistor.
The PI74FCT157T/257T and PI74FCT2157T/2257T are high-
speed quad 2-input multiplexers. The common select input can be
used to select four bits of data from two sources. The four buffered
outputs present the selected data in the true (non-inverting) form.
• Industrial operating temperature range: –40°C to +85°C
• Packagesavailable:
– 16-pin150milwideplasticQSOP(Q)
– 16-pin300milwideplasticSOIC(S)
– 16-pin150milwideplasticSOIC(W)
The PI74FCT157T/2157T has a common, active-LOW, Enable
input (E). When E is inactive, all four outputs are held LOW. The
PI74FCT157T/2157T can generate any four of the 16 different
funtions of two variables with one common variable. The
PI74FCT157T/2157T can be used as a function generator or to
move data from two different groups of registers to a common bus.
The PI74FCT257/2257T has a common Output Enable (OE) input.
When OE is HIGH, all outputs are switched to a high-impedance
state allowing the outputs to interface directly with bus-oriented
systems.
Logic Block Diagram
S
157
ONLY
3 OTHER MULTIPLEXERS
E
I
I
1
B-I
B-I
1
D
D
Z
Z
B-ZD
0
0
I
I
1
A
A
0
A
257
ONLY
OE
PS2010A 03/09/96
1
PI74FCT157T/257T
(25Ω Series)PI74FCT2157T/2257T
QUAD 2-INPUT MULTIPLEXER
Product Pin Description
Truth Table(1)
Inputs
Outputs ZN
Pin Name
I0A-I0D
I1A-I1D
E
Description
E/OE
S
X
H
H
L
L
I0
X
X
X
L
I1
X
L
157/2157 257/2257
Source 0 Data Inputs
H
L
L
L
L
L
L
H
L
H
Z
L
H
L
H
Source 1 Data Inputs
Enable Input (Active LOW) FCT157/2157
H
X
X
OE
Output Enable (Active LOW) FCT257/2257
S
Select Input
Outputs
Ground
H
ZA-ZD
GND
VCC
NOTE:
Power
1. H = High Voltage Level
X = Don't Care
L = Low Voltage Level
Z = High Impedance
PI74FCT157/2157T Product Pin Configuration
S
I0A
I1A
ZA
I0B
I1B
ZB
1
2
3
4
5
6
7
8
16 Vcc
15
14
13
12
11
10
9
E
I0C
I1C
ZC
I0D
I1D
ZD
16-PIN
Q16
S16
W16
GND
PI74FCT257/2257T Product Pin Configuration
S
A
A
1
2
3
4
5
6
7
8
16 Vcc
15 OE
I
I
0
1
16-PIN
Q16
S16
I
I
0
C
C
C
14
13
12
11
10
9
Z
A
1
I
I
0
B
B
Z
I
W16
1
0
D
D
D
Z
B
I
1
GND
Z
PS2010A 03/09/96
2
PI74FCT157T/257T
(25Ω Series)PI74FCT2157T/2257T
QUAD 2-INPUT MULTIPLEXER
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Storage Temperature ................................................................. –65°C to +150°C
Ambient Temperature with Power Applied ................................. -40°C to +85°C
Supply Voltage to Ground Potential (Inputs & Vcc Only) .......... –0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ....... –0.5V to +7.0V
DC Input Voltage ......................................................................... –0.5V to +7.0V
DC Output Current ................................................................................... 120 mA
Power Dissipation......................................................................................... 0.5W
Stresses greater than those listed under
MAXIMUM RATINGS may cause permanent
damage to the device. This is a stress rating
only and functional operation of the device at
these or any other conditions above those
indicated in the operational sections of this
specification is not implied. Exposure to
absolute maximum rating conditions for
extended periods may affect reliability.
DCElectricalCharacteristics(OvertheOperatingRange, TA =–40°Cto+85°C, VCC =5.0V± 5%)
Parameters Description
TestConditions(1) Min. Typ(2) Max. Units
OutputHIGHVoltage VCC =Min., VIN =VIH orVIL
VOH
VOL
VOL
VIH
VIL
IIH
IOH =–15.0mA
2.4
3.0
0.3
0.3
V
V
Output LOW Current
Output LOW Current
InputHIGHVoltage
Input LOW Voltage
InputHIGHCurrent
Input LOW Current
HighImpedance
VCC =Min., VIN =VIH orVIL
VCC =Min., VIN =VIH orVIL
GuaranteedLogicHIGHLevel
GuaranteedLogicLOWLevel
VCC =Max.
IOL = 48 mA
0.50
0.50
IOL =12mA(25ΩSeries)
V
2.0
V
0.8
1
V
VIN =VCC
µA
µA
µA
µA
V
IIL
VCC =Max.
VIN =GND
VOUT=2.7V
VOUT =0.5V
–1
1
IOZH
IOZL
VIK
IOFF
IOS
VCC =MAX.
Output Current
–1
ClampDiodeVoltage
PowerDownDisable
ShortCircuitCurrent
Input Hysteresis
VCC = Min., IIN =–18mA
VCC =GND,VOUT =4.5V
VCC =Max.(3),VOUT = GND
–0.7 –1.2
—
—
100
µA
mA
mV
–60 –120
200
VH
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
VIN = 0V
Typ
6
Max.
10
Units
pF
CIN
Input Capacitance
Output Capacitance
COUT
VOUT = 0V
8
12
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, +25°C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is determined by device characterization but is not production tested.
PS2010A 03/09/96
3
PI74FCT157T/257T
(25Ω Series)PI74FCT2157T/2257T
QUAD 2-INPUT MULTIPLEXER
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
0.1
500
µA
∆ICC
ICCD
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
0.5
2.5
mA
Supply Current per
Input per MHz(4)
VCC = Max.,
Outputs Open
VIN = VCC
VIN = GND
0.15
0.25
mA/
MHz
E or OE = GND
One Bit Toggling
50% Duty Cycle
IC
Total Power Supply
Current(6)
VCC = Max.,
Outputs Open
fI = 10 MHZ
50% Duty Cycle
E or OE = GND
One Bit Toggling
VIN = VCC
VIN = GND
1.5
1.8
3.5(5)
4.5(5)
mA
VIN = 3.4V
VIN = GND
VCC = Max.,
Outputs Open
fI = 2.5 MHZ
50% Duty Cycle
E or OE = GND
Four Bits Toggling
VIN = VCC
VIN = GND
1.5
2.5
3.5(5)
7.5(5)
VIN = 3.4V
VIN = GND
Notes:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V); all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. IC =IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fINI)
ICC = Quiescent Current
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fI = Input Frequency
NI = Number of Inputs at fI
All currents are in milliamps and all frequencies are in megahertz.
PS2010A 03/09/96
4
PI74FCT157T/257T
(25Ω Series)PI74FCT2157T/2257T
QUAD 2-INPUT MULTIPLEXER
PI74FCT157/2157T Switching Characteristics over Operating Range
157T/2157T 157AT/2157AT 157CT/2157CT
Com. Com. Com.
157DT
Com.
Parameters Description
Conditions(1)
Min
Max
Min
Max
Min
Max
Min Max Unit
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
Propagation Delay
to Z
Propagation Delay
E to Z
Propagation Delay
S to Z
C
R
L
L
= 50 pF
= 500Ω
1.5
1.5
1.5
6.0
1.5
1.5
1.5
5.0
1.5
1.5
1.5
4.3
1.5
1.5
1.5
3.9
4.4
4.6
ns
ns
ns
I
N
N
10.5
10.5
6.0
7.0
4.8
5.2
N
N
PI74FCT257/2257T Switching Characteristics over Operating Range
257T/2257T 257AT/2257AT 257CT/2257CT
Com. Com. Com.
Parameters Description
Conditions(1)
Min
Max
Min
Max
Min
Max
Unit
t
t
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PZH
PZL
PZH
PZL
Propagation Delay
to Z
Propagation Delay
S to Z
Output Enable Time
OE to Z
Output Disable Time
OE to Z
C
R
L
L
= 50 pF
= 500Ω
1.5
1.5
1.5
1.5
6.0
1.5
1.5
1.5
1.5
5.0
1.5
1.5
1.5
1.5
4.3
ns
I
N
N
10.5
8.5
7.0
7.0
5.5
5.2
6.0
5.0
ns
ns
ns
N
N
(3)
6.0
N
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter guaranteed but not production tested.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
PS2010A 03/09/96
5
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