74FST1632861PFG [IDT]
Bus Driver, PDSO48;
| 型号： | 74FST1632861PFG |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | Bus Driver, PDSO48 驱动 光电二极管 逻辑集成电路 |
| 文件： | 总6页 (文件大小：78K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
20-BIT, TWO PORT BUS
SWITCH WITH RESISTOR
IDT74FST1632861
FEATURES:
DESCRIPTION:
• Bus switches provide zero delay paths
• Low switch on-resistance: 28Ω
The FST1632861belongs toIDT's familyofBus switches.Bus switch
devices perform the function of connecting or isolating two ports without
providing any inherent current sink or source capability. They generate
little or no noise of their own while providing a low resistance path for an
externaldriver. These devices connectinputandoutputports throughan
n-channelFET. Whenthegate-to-sourcejunctionofthisFETisadequately
forward-biased,thedeviceconductsandtheresistancebetweeninputand
outputportsissmall. With-outadequatebiasonthegate-to-sourcejunction
ofthe FET,the FETis turnedoff,therefore withnoVCC applied,thedevice
has hotinsertioncapability.
• TTL-compatible input and output levels
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
• Hot insertion capability
• Very low power dissipation
• Available in SSOP, TSSOP, and TVSOP packages
TheFST1632861busswitchhasabuilt-in28Ωseriesresistortoreduce
noise which can result from reflections. This 28Ω built-in series resistor
eliminates the needforanexternalterminatingresistor.
FUNCTIONALBLOCKDIAGRAM
1OE
2OE
A0
B0
A10
B10
A1
A2
B1
B2
A11
A12
B11
B12
A3
A4
B3
B4
A13
A14
B13
B14
A5
A6
B5
B6
A15
A16
B15
B16
A7
A8
B7
B8
A17
A18
B17
B18
A9
B9
A19
B19
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
JUNE 2006
1
© 2006 Integrated Device Technology, Inc.
DSC-5582/4
IDT74FST1632861
20-BIT,TWOPORTBUSSWITCHWITHRESISTOR
INDUSTRIALTEMPERATURERANGE
PINCONFIGURATION
ABSOLUTEMAXIMUMRATINGS(1)
Symbol
Description
Max
–0.5 to +7
–65 to +150
128
Unit
V
(2)
VTERM
Terminal Voltage with Respect to GND
Storage Temperature
NC
A0
A1
A2
A3
A4
A5
A6
1
2
3
4
5
6
7
8
48
47
46
45
44
43
42
41
VCC
1OE
B0
TSTG
IOUT
° C
mA
Maximum Continuous Channel Current
NOTES:
1. Stresses greater than those listed under ABSOLUTE 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.
B1
B2
2. Vcc, Control, and Switch terminals.
B3
B4
B5
CAPACITANCE(1)
A7
A8
9
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
B6
Symbol
Parameter
Conditions(2) Typ. Unit
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
B7
CIN
Control Input Capacitance
Switch Input/Output Capacitance
6
pF
pF
A9
B8
CI/O
Switch Off
12
NOTES:
GND
NC
B9
1. Capacitance is characterized but not tested.
2. TA = 25°C, f = 1MHz, VIN = 0V, VOUT = 0V.
Vcc
2OE
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
GND
PINDESCRIPTION
Pin Names
Description
xOE
Output Enable Inputs (Active LOW)
Ax
A Port Bits
B Port Bits
Bx
FUNCTIONTABLE(1)
Inputs
SSOP/ TSSOP/ TVSOP
TOP VIEW
xOE
Outputs
L
Connect A to B
H
Disconnect A from B
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
2
IDT74FST1632861
20-BIT,TWOPORTBUSSWITCHWITHRESISTOR
INDUSTRIALTEMPERATURERANGE
DCELECTRICALCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = –40°C to +85°C, VCC = 5.0V ± 10%
Symbol
VIH
Parameter
Test Conditions(1)
Guaranteed Logic HIGH for Control Inputs
Guaranteed Logic LOW for Control Inputs
Min.
2
Typ.(2)
—
Max.
—
0.8
1
Unit
V
Control Input HIGH Voltage
Control Input LOW Voltage
Control Input HIGH Current
Control Input LOW Current
VIL
—
—
—
—
V
IIH
VCC = Max.
VI = VCC
VI = GND
—
µA
IIL
—
1
IOZH
IOZL
Current During
VCC = Max., VO = 0 to 5V
VCC = Min., IIN = –18mA
—
—
—
—
1
1
µA
V
Bus Switch Disconnect
VIK
Clamp Diode Voltage
—
–0.7
–1.2
IOFF
ICC
Switch Power Off Leakage
VCC = 0V, VIN or VO ≤ 5.5V
—
—
—
1
3
µA
µ A
Quiescent Power Supply Current
VCC = Max., VIN = GND or VCC
0.1
BUSSWITCHIMPEDANCEOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ±10%
Symbol
Parameter
Test Conditions
Min.
Typ.(1)
28
Max.
40
Unit
RON
Switch CONNECT Resistance,
VIN = 0V, ION = 48mA
VIN = 2.4V, ION = 15mA
20
20
Ω
(2)
A to B
35
48
(3)
IOS
Short Circuit Current, A to B
A(B) = 0V, B(A) = Vcc
100
—
—
mA
NOTES:
1. Typical values are at Vcc = 5.0V, +25°C ambient.
2. The voltage drop between the indicated ports divided by the current through the switch.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
3
IDT74FST1632861
20-BIT,TWOPORTBUSSWITCHWITHRESISTOR
INDUSTRIALTEMPERATURERANGE
POWERSUPPLYCHARACTERISTICS
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
ΔICC
Quiescent Power Supply Current
TTL Inputs HIGH
VCC = Max.
VIN = 3.4V
—
0.5
1.5
mA
(3)
ICCD
IC
Dynamic Power Supply
Current(4,5)
VCC = Max.
Outputs Open
Select Input Togging
50% Duty Cycle
VIN = VCC
VIN = GND
—
30
400
µ A /
MHz/
Select
Total Power Supply Current(6)
VCC = Max.
Outputs Open
VIN = VCC
VIN = GND
—
—
0.6
0.7
8
mA
Two Enable Pins Toggling
fi = 10MHz
VIN = 3.4V
VIN = GND
9.5
50% Duty Cycle
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. TA = –40°C to +85°C
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. Switch inputs do not contribute to ΔICC.
4. This parameter represents the current required to switch the internal capacitance of the control inputs at the specified frequency.
Switch inputs generate no significant power supply currents as they transition. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. CPD = ICCD/VCC
CPD = Power Dissipation Capacitance
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fiN)
ICC = Quiescent Current
ΔICC = 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)
fi = Control Input Frequency
N = Number of Control Inputs Toggling at fi
SWITCHINGCHARACTERISTICSOVEROPERATINGRANGE
FollowingConditionsApplyUnlessOtherwiseSpecified:
Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10%
VCC = 5V ± 10%
VCC = 4V
Symbol
tPLH
Description(1)
Min.
Typ.
Max.
Max.
Unit
DataPropagationDelay
—
—
0.25
0.25
ns
(2)
tPHL
A to B, Y to B
tPZH
Switch CONNECT Delay
xOE to A or B
Switch DISCONNECT Delay
xOE to A or B
1.5
1.5
—
—
—
1.5
6.5
7
7
7
ns
ns
tPZL
tPHZ
tPLZ
|QCI|
Charge Injection During Switch DISCONNECT,
—
—
pC
(3)
xOE to A or B
NOTES:
1. See test circuits and waveforms.
2. The bus switch contributes no Propagation Delay other than the RC Delay of the load interacting with the RC of the switch.
3. |QCI| is the charge injection for a single switch DISCONNECT and applies to either single switches or multiplexers. |QDCI| is the charge injection for a multiplexer as the multiplexed
port switches from one path to another. Charge injection is reduced because the injection from the DISCONNECT of the first path is compensated by the CONNECT of the
second path.
4
IDT74FST1632861
20-BIT,TWOPORTBUSSWITCHWITHRESISTOR
INDUSTRIALTEMPERATURERANGE
TESTCIRCUITSANDWAVEFORMS
3V
1.5V
0V
VCC
7.0V
SAME PHASE
INPUT TRANSITION
500Ω
tPLH
tPLH
tPHL
tPHL
VOH
1.5V
VOL
VOUT
VIN
OUTPUT
Pulse
Generator
D.U.T.
50pF
3V
1.5V
0V
500Ω
OPPOSITE PHASE
INPUT TRANSITION
RT
L
C
Propagation Delay
Test Circuits for All Outputs
3V
DATA
1.5V
0V
INPUT
tH
SWITCHPOSITION
tSU
3V
1.5V
0V
TIMING
INPUT
Test
Switch
Closed
Open
Open Drain
Disable Low
Enable Low
tREM
3V
1.5V
0V
ASYNCHRONOUS
CONTROL
All Other Tests
3V
1.5V
0V
SYNCHRONOUS
CONTROL
DEFINITIONS:
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse Generator.
tSU
tH
Set-up, Hold, and Release Times
VCC
ENABLE
DISABLE
3V
Switch
Out
(1)
(3)
VOUT
1 MHz
Signal
Generator
Enable/Select
Switch In
CONTROL
INPUT
1.5V
0V
D.U.T.
(2)
Switch In (MUX)
tPZL
tPLZ
CL =
50pF
3.5V
1.5V
3.5V
VOL
VOH
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
0.3V
0.3V
tPZH
tPHZ
Charge Injection
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
NOTES:
1. Select is used with multiplexers for measuring IQDCII during multiplexer select. During
all other tests Enable is used.
0V
2. Used with multiplexers to measure IQDCII only.
3. Charge Injection = ΔVOUT CL, with Enable toggling for IQCII or Select toggling for IQDCII.
ΔVOUT is the change in VOUT and is measured with a 10MΩ probe.
Enable and Disable Times
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns.
LOW-HIGH-LOW
1.5V
PULSE
tW
HIGH-LOW-HIGH
PULSE
1.5V
Pulse Width
5
IDT74FST1632861
20-BIT,TWOPORTBUSSWITCHWITHRESISTOR
INDUSTRIALTEMPERATURERANGE
ORDERINGINFORMATION
IDT
XX
FST
XXX
XX
XXX
Temp. Range
Package
Family
Device Type
PV
PVG
Shrink Small Outline Package
SSOP - Green
PA
Thin Shrink Small Outline Package
PAG
PF
PFG
TSSOP - Green
Thin Very Small Outline Package
TVSOP - Green
20-Bit Flow Through Switch with Resistor
2861
163
74
Double-Density Bus Switch
–40°C to +85°C
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