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IDT74FST163292 24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
INDUSTRIAL TEMPERATURE RANGE
24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
IDT74FST163292
FEATURES:
* * * *
Bus switches provide zero delay paths Low switch on-resistance: 4 TTL-compatible input and output levels ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) * Available in SSOP and TSSOP packages
The FST163292 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. 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 gate-to-source junction of the FET, the FET is turned off, therefore with no VCC applied, the device has not 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. The FST163292 provides four 12-bit TTL-compatible ports that support 2 way bus exchange. The S0 pin controls the bus exchange and switch enable functions.
DESCRIPTION:
FUNCTIONAL BLOCK DIAGRAM
1 of 12 Channels
1A 1 1B 1
1A 2
1B 2
500
FLOW CONTROL S0
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
1
(c) 2002 Integrated Device Technology, Inc.
MAY 2002
DSC-5866/1
IDT74FST163292 24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
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
ABSOLUTE MAXIMUM RATINGS(1)
Symbol VTERM(2) 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 TSTG IOUT
S0
1A1
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
SSOP/ TSSOP TOP VIEW
NC NC
1B1
NC
2A1
1B2 2B1 2B2 3B1
NC
3A1
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.
NC GND
4A1
GND
3B2
4B1
CAPACITANCE(1)
Symbol CIN COFF CON Parameter Control Input Capacitance Switch Input/Output Capacitance A/B Capacitance Switch Off Switch On Conditions(2) Typ. 8 20 40 Unit pF pF pF
NC
5A1
4B2 5B1 5B2 6B1 6B2 7B1 7B2 8B1
NC
6A1
NOTES: 1. Capacitance is characterized but not tested. 2. TA = 25C, f = 1MHz, VIN = 0V, VOUT = 0V.
NC
7A1
NC VCC
8A1
PIN DESCRIPTION
Pin Names A1, A2 B1, B2 S0 I Control Pin for Mux and Switch Enable Functions I/O I/O Description Buses A1, A2, B1, B2
GND NC
9A1
GND
8B2 9B1 9B2 10B1 10B2 11B1 11B2 12B1 12B2
NC
10A1
FUNCTION TABLE(1)
S0 L H A1 B1 B2 A2 B2 B1 Function A1 to B1, A2 to B2 A1 to B2, A2 to B1
NC
11A1
NC
12A1
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
NC
2
IDT74FST163292 24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
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 CONNECT Resistance(2) Short Circuit Current(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
(1)
Max. 7 12 15 --
Unit mA
10 12 300
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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IDT74FST163292 24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
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., Outputs Open Select Pin Toggling 50% Duty Cycle VCC = Max., Outputs Open Select Pin Toggling (24 Switches Toggling) fi = 10MHz 50% Duty Cycle VIN = VCC VIN = GND VIN = VCC VIN = GND VIN = 3.4V VIN = GND Test Conditions(1) Min. -- -- Typ.(2) 0.5 30 Max. 1.5 40 Unit mA A/ MHz/ Select mA
IC
--
7.2
9.6
--
7.7
11.1
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 tBX tPZH tPZL tPHZ tPLZ |QDCI| tM Description(1) Data Propagation Delay A to B, B to A(2) Switch Multiplex Delay S to A, B Switch Turn On Delay S to A, B Switch Turn Off Delay S to A, B Charge Injection During Switch Multiplex, Sx to xAx or xBx(3) Make-Before-Break Time VCC = 5V 10% Min. -- 1.5 1.5 1.5 -- 0 Typ. -- -- -- -- 0.5 -- Max. 0.25 6.5 6.5 7 -- 2 VCC = 4V Max. 0.25 7 7 7 -- 2 Unit ns ns ns ns pC ns
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. |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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IDT74FST163292 24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
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
IDT74FST163292 24-BIT BUS EXCHANGE SWITCH WITH BUS TERMINATOR
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT XX FST XXX Family Temp. Range XXX Device Type XX Package
PV PA 292
Shrink Small Outline Package Thin Shrink Small Outline Package 24-Bit Bus Exchange Switch
163
Double-Density Bus Switch -40C to +85C
74
DATA SHEET DOCUMENT HISTORY
5/28/2002 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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