PI74FCT3X2257ATB [PERICOM]
Multiplexer, FCT Series, 12-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO48, BQSOP-48;
| 型号： | PI74FCT3X2257ATB |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | Multiplexer, FCT Series, 12-Func, 2 Line Input, 1 Line Output, True Output, CMOS, PDSO48, BQSOP-48 光电二极管 逻辑集成电路 |
| 文件： | 总5页 (文件大小：216K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
25Ω Series
PI74FCT3X2257T
Fast CMOS
24:12 Multiplexer
Features
ProductDescription
Ideal for digital video switching
25Ω series resistor on all outputs
TTL input and output levels
Low ground bounce outputs
Extremelylowstaticpower
Hysteresis on all inputs
Pericom Semiconductors PI74FCT series of logic circuits are
producedintheCompanysadvanced0.8micronCMOStechnology,
achieving industry leading speed grades. All PI74FCT3X2257T
devices 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.
ThePI74FCT3X2257Tisabuffered24:12ortwelve2:1multiplexers
that is ideal for switching and buffering 8-bit or
12-bitYCbCrvideodata.
Industrial operating temperature range: 40°C to +85°C
Package:
48-pinBQSOP(B48)
Product Pin Description
Logic Block Diagram
Pin Name
I0A-I0L
I1A-I1L
OE1 - OE3
S1- S3
Description
Source 0 Data Inputs
S1
Source 1 Data Inputs
3 OTHER MULTIPLEXERS
Output Enable (Active LOW) FCT3X2257
I
I
1B −
0B −
I
I
1D
0D
Select Input
Outputs
Ground
Z
Z
B − ZD
ZA-ZL
GND
I
I
1
A
A
VCC
Power
A
0
OE1
Truth Table(1)
S2
Inputs
Output ZN
OE
H
L
S
X
H
H
L
I0
X
X
X
L
I1
X
L
2257
Z
3 OTHER MULTIPLEXERS
I
I
1F −
0F −
I
1H
0H
Z
Z
F − ZH
L
I
L
H
X
X
H
L
L
I
I
1
E
E
E
L
L
H
H
0
Note:
1. H = High Voltage Level
OE2
S3
3 OTHER MULTIPLEXERS
I
1J −
0J −
I
I
1L
0L
Z
Z
J − ZL
I
I
1
I
I
I
I
0
OE3
PS8119 05/06/97
1
25Ω Series
PI74FCT3X2257T
24:12 MULTIPLEXER
PI74FCT3X2257T Product Pin Configuration
S1
I0A
I1A
ZA
Vcc
OE1
I0C
I1C
ZC
1
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
2
3
4
I0B
I1B
ZB
5
I0D
I1D
ZD
6
7
GND
S2
8
Vcc
OE2
I0G
I1G
ZG
9
I0E
I1E
ZE
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48-PIN
BQSOP
I0F
I1F
ZF
I0H
I1H
ZH
GND
S3
Vcc
OE3
I0K
I1K
ZK
I0I
I1I
ZI
I0J
I0J
ZJ
I0L
I1L
GND
ZL
PS8119 05/06/97
2
25Ω Series
PI74FCT3X2257T
24:12 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.
DC Electrical Characteristics (Over the Operating Range, TA = 40°C to +85°C, VCC = 5.0V ± 5%)
Parameters Description
Test Conditions(1) Min. Typ(2) Max. Units
VOH
VOL
VIH
VIL
IIH
Output HIGH Voltage VCC = Min., VIN = VIH or VIL
Output LOW Current VCC = Min., VIN = VIH or VIL
IOH = 15.0 mA
2.4
3.0
V
V
IOL = 12 mA (25Ω Series)
0.3 0.50
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
VCC = Max.
2.0
V
0.8
V
VIN = VCC
1
µA
µA
µA
µA
V
IIL
VCC = Max.
VIN = GND
VOUT = 2.7V
VOUT = 0.5V
1
IOZH
IOZL
VIK
IOFF
IOS
VCC = MAX.
1
1
Output Current
Clamp Diode Voltage VCC = Min., IIN = 18 mA
Power Down Disable VCC = GND, VOUT = 4.5V
Short Circuit Current VCC = Max.(3), VOUT = GND
Input Hysteresis
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.
PS8119 05/06/97
3
25Ω Series
PI74FCT3X2257T
24:12 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.
PS8119 05/06/97
4
25Ω Series
PI74FCT3X2257T
24:12 MULTIPLEXER
PI74FCT257/2257T Switching Characteristics over Operating Range
2257T
Com.
2257AT
Com.
Parameters Description
Conditions(1)
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
= 500W
1.5
1.5
1.5
1.5
6.0
1.5
1.5
1.5
1.5
5.0
ns
IN
N
10.5
8.5
7.0
7.0
5.5
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
PS8119 05/06/97
5
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