IDT74FST163384 IDT74FST1632384 ADVANCE INFORMATION 20-BIT BUS SWITCH Integrated Device Technology, Inc. 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 gate-to-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. The FST1632xxx integrates terminating resistors in the device, thus eliminating the need for external 25Ω series resistors. The FST163384 and FST1632384 are 20-bit TTL-compatible bus switches. The BEx pins provide enable control. FEATURES: • Bus switches provide zero delay paths • Extended commercial range of –40°C to +85°C • Low switch on-resistance: FST163xxx – 5Ω FST1632xxx — 28Ω • 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, TSSOP and TVSOP DESCRIPTION: The FST163384/1632384 belong to IDT's family of Bus switches. Bus switch devices perform the function of connecting or isolating two ports without providing any inherent FUNCTIONAL BLOCK DIAGRAM A0 B0 A10 B10 A4 B4 A14 B14 A5 B5 A15 B15 A9 B9 A19 B19 BEA BEC BEB BED 3473 drw 01 PIN DESCRIPTION Pin Names A0-19 I/O I/O B0-19 I/O BEA, BEB, BEC, BED, I Description Bus A Bus B Bus Switch Enable (Active LOW) 3473 tbl 01 The IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE FEBRUARY 1997 1997 Integrated Device Technology, Inc. DSC-3473/4 1 IDT74FST163384, IDT74FST1632384 20-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION BEA 1 48 Vcc B0 2 47 B19 A0 3 46 A19 A1 4 45 A18 B1 5 44 B18 B2 6 43 B17 A2 7 42 A17 A3 8 41 A16 B3 9 40 B16 B4 10 39 B15 A4 11 38 A15 GND 12 BEC SO48-1 SO48-2 SO48-3 Symbol Description VTERM(2) Terminal Voltage with Respect to GND TSTG Storage Temperature I OUT Max. –0.5 to +7.0 Unit V –65 to +150 °C 128 mA Maximum Continuous Channel Current 3473 tbl 02 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 condiitions for extended periods may affect reliability. 2. VCC, Control and Switch terminals. FUNCTION TABLE BEA BEB B0-4 H H Hi-Z B5-9 Hi-Z Description Disconnect 37 BEB L H A0-4 Hi-Z Connect 13 36 Vcc H L Hi-Z A5-9 Connect B5 14 35 A14 L L A0-4 A5-9 Connect A5 15 34 B14 BEC BED H H B10-14 Hi-Z B15-19 Hi-Z A6 16 33 A13 L H A10-14 Hi-Z Connect B6 17 32 B13 H L Hi-Z A15-19 Connect L L A10-14 A15-19 Connect B7 18 31 B12 A7 19 30 A12 A8 20 29 A11 B8 21 28 B11 B9 22 27 B10 A9 23 26 A10 GND 24 25 BED SSOP/ TSSOP/TVSOP TOP VIEW Description Disconnect 3473 tbl 03 CAPACITANCE(1) Symbol Parameter CIN Control Input Capacitance CI/O Switch Input/Output Capacitance Conditions(2) Typ. Unit 4 Switch Off NOTES: 1. Capacitance is characterized but not tested 2. TA = 25°C, f = 1MHz, VIN = 0V, VOUT = 0V 3473 drw 02 2 pF pF 3473 tbl 04 IDT74FST163384, IDT74FST1632384 20-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Commercial: TA = –40°C to +85°C, VCC = 5.0V ±10% Parameter Input HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH for Control Inputs Min. 2.0 Typ.(2) — Max. — Unit V VIL Input LOW Voltage Guaranteed Logic LOW for Control Inputs — — 0.8 V II H Input HIGH Current VCC = Max. VI = VCC — — ±1 µA II L Input LOW Voltage VI = GND — — ±1 IOZH High Impedance Output Current VCC = Max. VO = VCC — — ±1 IOZL (3-State Output pins) VO = GND — — ±1 — 300 — Symbol VIH GND(3) µA IOS Short Circuit Current VCC = Max., VO = VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V RON Switch On Resistance(4) VCC = Min. VIN = 0.0V 163xxx — 5 7 Ω ION = 30mA 1632xxx 20 28 40 VCC = Min. VIN = 2.4V 163xxx — 10 15 ION = 15mA 1632xxx 20 35 48 IOFF Input/Output Power Off Leakage VCC = 0V, VIN or VO ≤ 4.5V — — 1 ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.1 3 NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient. 3. Not more than one output should be tested at one time. Duration of the test should not exceed one second. 4. Measured by voltage drop between ports at indicated current through the switch. 3 mA Ω µA µA 3473 tbl 05 IDT74FST163384, IDT74FST1632384 20-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Symbol ∆ICC ICCD IC Parameter Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply Current(4) Total Power Supply Current (6) Test Conditions(1) VCC = Max. VIN = 3.4V(3) VCC = Max. Outputs Open Enable Pin Toggling 50% Duty Cycle VCC = Max. Outputs Open Enable Pins Toggling (20 Switches Toggling) fi = 10MHz 50% Duty Cycle Min. — Typ.(2) 0.5 Max. 1.5 Unit mA VIN = VCC VIN = GND — 30 40 µA/ MHz/ Switch VIN = VCC VIN = GND — 6.0 8.0 mA VIN = 3.4 VIN = GND — 7.0 11.0 NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 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 (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 = Input Frequency N = Number of Switches Toggling at fi All currents are in milliamps and all frequencies are in megahertz. 3473 tbl 06 SWITCHING CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Commercial: TA =–40°C to +85°C, VCC = 5.0V ±10% 163384 Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ |QCI| Description Data Propagation Delay Ai to Bi, Bi to Ai(3,4) Switch Turn on Delay BEx to Ai, Bi Switch Turn off Delay BEx to Ai, Bi(3) Charge Injection (5,6) Condition(1) CL = 50pF RL = 500Ω 1632384 Min.(2) — Typ. — 0.25 1.25 Unit ns 1.5 — 6.5 7.5 ns 1.5 — 5.5 5.5 ns — 1.5 — — pC Max. 3473 tbl 07 NOTES: 1. See test circuit and waveforms. 2. Minimum limits guaranteed but not tested. 3. This parameter is guaranteed by design but not tested. 4. The bus switch contributes no propagation delay other than the RC delay of the on resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 2.5ns for 50pF load. Since this time is constant and much smaller than the rise/fall times of typical driving signals, it adds very little propagation delay to the system. Propagation delay on the bus switch when used in a system is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side. 5. Measured at switch turn off, load = 50 pF in parallel with 10MΩ scope probe, VIN = 0.0 volts. 6. Characterized parameter. Not 100% tested. 4 IDT74FST163384, IDT74FST1632384 20-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS TEST CIRCUITS FOR ALL OUTPUTS V CC SWITCH POSITION 500Ω Pulse Generator Switch Open Drain Disable Low Closed Enable Low V OUT VIN Test 7.0V Open All Other Tests D.U.T. 50pF RT 3473 lnk 08 DEFINITIONS: CL= Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. 500Ω CL 3473 lnk 03 PULSE WIDTH SET-UP, HOLD AND RELEASE TIMES DATA INPUT tH tSU TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL PRESET CLEAR CLOCK ENABLE ETC. tREM tSU 3V 1.5V 0V 3V 1.5V 0V LOW-HIGH-LOW PULSE 1.5V tW 3V 1.5V 0V HIGH-LOW-HIGH PULSE 1.5V 3V 1.5V 0V tH 3473 lnk 05 3473 lnk 04 PROPAGATION DELAY ENABLE AND DISABLE TIMES ENABLE SAME PHASE INPUT TRANSITION tPLH tPHL OUTPUT tPLH OPPOSITE PHASE INPUT TRANSITION tPHL 3V 1.5V 0V DISABLE 3V 1.5V CONTROL INPUT OUTPUT NORMALLY LOW 3V 1.5V 0V SWITCH CLOSED 3.5V 1.5V tPZH OUTPUT NORMALLY HIGH 3473 lnk 06 SWITCH OPEN 0V tPLZ tPZL VOH 1.5V VOL 3.5V 0.3V VOL tPHZ 0.3V VOH 1.5V 0V 0V 3473 lnk 07 NOTES: 1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH 2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns 5 IDT74FST163384, IDT74FST1632384 20-BIT BUS SWITCH COMMERCIAL TEMPERATURE RANGE ORDERING INFORMATION IDT XX FST 16 XX Temp. Range Device Type X Package PV PA PF Shrink Small Outline Package (SO48-1) Thin Shrink Small Outline Package (SO48-2) Thin Very Small Outline Package (SO48-3) 163384 1632384 20-Bit Bus Switch 74 –40°C to +85°C 3473 drw 08 6