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IDT74FST163211 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
24-BIT BUS SWITCH
IDT74FST163211
FEATURES:
* * * *
DESCRIPTION:
Bus switches provide zero delay paths Low switch on-resistance; 5 TTL-compatible input and output levels ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * Available in TSSOP package
The FST163211 belongs to IDT's family of Bus switches. Bus switch devices perform the function of connecting or isolating two ports without providing any inherent current sink or source capability. Thus they generate little or no noise of their own while providing a low resistance path for an external driver. These devices connect input and output ports through an n-channel FET. When the gate-to-source junction of this FET is adequately forward-biased, the device conducts and the resistance between input and output ports is small. Without adequate bias on the gateto-source junction of the FET, the FET is turned off, therefore with no VCC applied, the device has hot insertion capability. The low on-resistance and simplicity of the connection between input and output ports reduces the delay in this path to close to zero.
FUNCTIONAL BLOCK DIAGRAM
1A1 1B1
1A12
1B12
2A1
2B1
2A12
2B12
1OE 2OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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(c) 2004 Integrated Device Technology, Inc.
JANUARY 2004
DSC-3685/3
IDT74FST163211 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
NC
1A1 1A2 1A3 1A4 1A5 1A6
ABSOLUTE MAXIMUM RATINGS(1)
Symbol Description Terminal Voltage with Respect to GND Storage Temperature Maximum Continuous Channel Current Max -0.5 to +7 -65 to +150 128 Unit V C mA
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
1OE 2OE 1B1 1B2 1B3 1B4 1B5
VTERM(2) TSTG IOUT
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. 2. Vcc, Control, and Switch terminals.
GND
1A7 1A8 1A9 1A10 1A11 1A12 2A1 2A2
GND
1B6 1B7 1B8 1B9 1B10 1B11 1B12 2B1 2B2 2B3
CAPACITANCE(1)
Symbol CIN CI/O Parameter Control Input Capacitance Switch Input/Output Capacitance Switch Off Conditions(2) Typ. 6 12 Unit pF pF
NOTES: 1. Capacitance is characterized but not tested. 2. TA = 25C, f = 1MHz, VIN = 0V, VOUT = 0V.
PIN DESCRIPTION
Pin Names xAx xBx xOE I/O I/O I/O I Description Bus A Bus B Switch Enable
VCC
2A3
GND
2A4 2A5 2A6 2A7 2A8 2A9 2A10 2A11 2A12
GND
2B4 2B5 2B6 2B7 2B8 2B9 2B10 2B11 2B12
FUNCTION TABLE(1)
1OE 2OE 1A, 1B 1A 1A 2A, 2B 2A
Description Connect Bank 1 Connect Bank 2 Connect Disconnect
L L H H
L H L H
= 1B = 1B Z Z
= 2B Z = 2B Z
2A
TSSOP TOP VIEW
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level Z = High-Impedance
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IDT74FST163211 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 10%
Symbol VIH VIL IIH IIL IOZH IOZL VIK IOFF ICC Parameter Control Input HIGH Voltage Control Input LOW Voltage Control Input HIGH Current Control Input LOW Current Current During Bus Switch Disconnect Clamp Diode Voltage Switch Power Off Leakage Quiescent Power Supply Current VCC = Min., IIN = -18mA VCC = 0V, VIN or VO 5.5V VCC = Max., VIN = GND or VCC VCC = Max., VO = 0 to 5V Test Conditions(1) Guaranteed Logic HIGH for Control Inputs Guaranteed Logic LOW for Control Inputs VCC = Max. VI = VCC VI = GND Min. 2 -- -- -- -- -- -- -- -- Typ.(2) -- -- -- -- -- -- -0.7 -- 0.1 Max. -- 0.8 1 1 1 1 -1.2 1 3 V A A A Unit V V A
BUS SWITCH IMPEDANCE OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 10%
Symbol RON IOS Parameter Switch On Resistance(2) Short Circuit Current, A to B(3) Test Conditions Vcc = Min., VIN = 0V, ION = 64mA Vcc = Min., VIN = 0V, ION = 30mA Vcc = Min., VIN = 2.4V, ION = 15mA Vcc = Max., Vo =GND Min. -- -- -- -- Typ. 5 5 -- 300
(1)
Max. 6 7 15 --
Unit mA
NOTES: 1. Typical values are at Vcc = 5.0V, +25C 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.
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IDT74FST163211 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol ICC ICCD Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4,5) Total Power Supply Current(6) VCC = Max. VIN = 3.4V(3) VCC = Max. One Enable Pin Toggling 50% Duty Cycle VCC = Max. One Enable Pin Toggling fi = 10MHz 50% Duty Cycle VCC = Max. Two Enable Pins Toggling fi = 10MHz 50% Duty Cycle VIN = VCC VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND Test Conditions(1) Min. -- -- Typ.(2) 0.5 240 Max. 1.5 320 Unit mA A/ MHz/ Switch mA
IC
-- -- -- --
2.4 2.7 4.8 5.4
3.2 4 6.4 8
NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. TA = -40C to +85C 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V). All other inputs at VCC or GND. Switch inputs do not contribute to ICC. 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 + ICC DHNT + ICCD (fiN) 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) fi = Control Input Frequency N = Number of Control Inputs Toggling at fi
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C, VCC = 5.0V 10%
Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ |QCI|
NOTES:
VCC = 5V 10% Description(1) Data Propagation Delay A to B, B to A(2) Switch CONNECT Delay xOE to A or B Switch DISCONNECT Delay xOE to A or B Charge Injection During Switch DISCONNECT xOE to A or B(3) Min. -- 1.5 1.5 -- Typ. -- -- -- 1.5 Max. 0.25 6.5 5.5 --
VCC = 4V Max. 0.25 7 7 -- Unit ns ns ns pC
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.
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IDT74FST163211 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
V CC 500 VIN Pulse Generator RT D.U.T. 50pF CL 500 OPPOSITE PHASE INPUT TRANSITION VOUT OUTPUT tPLH tPHL 7.0V SAME PHASE INPUT TRANSITION tPLH tPHL 3V 1.5V 0V VOH 1.5V VOL 3V 1.5V 0V
Propagation Delay Test Circuits for All Outputs
3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V 3V 1.5V 0V
SWITCH POSITION
Test Open Drain Disable Low Enable Low All Other Tests Switch Closed Open
DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL SYNCHRONOUS CONTROL
tSU
tH
tREM
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 1 MHz Signal Generator Enable/Select Switch In Switch In (MUX) (2)
(1)
DISABLE 3V 1.5V
Switch D.U.T. Out
VOUT
(3)
CONTROL INPUT CL = 50pF tPZL OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED tPZH 3.5V 1.5V tPHZ 0.3V 1.5V 0V tPLZ
0V 3.5V 0.3V VOL VOH 0V
Charge Injection
NOTES: 1. Select is used with multiplexers for measuring IQDCII during multiplexer select. During all other tests Enable is used. 2. Used with multiplexers to measure IQDCII only. 3. Charge Injection = VOUT CL, with Enable toggling for IQCII or Select toggling for IQDCII. VOUT is the change in VOUT and is measured with a 10M probe.
SWITCH OPEN
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 PULSE tW HIGH-LOW-HIGH PULSE
1.5V
1.5V
Pulse Width 5
IDT74FST163211 24-BIT BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX FST Temp. Range XXX Family XXX Device Type X Package
PA PAG
Thin Shrink Small Outline Package TSSOP - Green
211 163 74
24-Bit Bus Switch
Double-Density Bus Switch -40C to +85C
DATA SHEET DOCUMENT HISTORY
5/24/2002 Removed TVSOP package
CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054
for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com
for Tech Support: logichelp@idt.com (408) 654-6459
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