IDT74FST1632861 20-BIT, TWO PORT BUS SWITCH WITH RESISTOR INDUSTRIAL TEMPERATURE RANGE 20-BIT, TWO PORT BUS SWITCH WITH RESISTOR IDT74FST1632861 FEATURES: DESCRIPTION: • • • • The FST1632861 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. With-out 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 FST1632861 bus switch has a built-in 28Ω series resistor to reduce noise which can result from reflections. This 28Ω built-in series resistor eliminates the need for an external terminating resistor. Bus switches provide zero delay paths Ω Low switch on-resistance: 28Ω 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 FUNCTIONAL BLOCK DIAGRAM 1OE 2OE A0 B0 A10 B10 A1 B1 A11 B11 A2 B2 A12 B12 A3 B3 A13 B13 A4 B4 A14 B14 A5 B5 A15 B15 A6 B6 A16 B16 A7 B7 A17 B17 A8 B8 A18 B18 A9 B9 A19 B19 The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE JUNE 2006 1 © 2006 Integrated Device Technology, Inc. DSC-5582/4 IDT74FST1632861 20-BIT, TWO PORT BUS SWITCH WITH RESISTOR INDUSTRIAL TEMPERATURE RANGE PIN CONFIGURATION NC 1 ABSOLUTE MAXIMUM RATINGS(1) 48 Symbol Description Max Unit VTERM(2) Terminal Voltage with Respect to GND –0.5 to +7 V VCC TSTG Storage Temperature –65 to +150 °C IOUT Maximum Continuous Channel Current 128 mA A0 2 47 1OE A1 3 46 B0 A2 4 45 B1 A3 5 44 B2 A4 6 43 B3 A5 7 42 B4 A6 8 41 B5 A7 9 40 B6 A8 10 39 B7 A9 11 38 B8 GND 12 37 B9 NC 13 36 Vcc A10 14 35 2OE A11 15 34 B10 A12 16 33 B11 A13 17 32 B12 A14 18 31 B13 A15 19 30 B14 A16 20 29 B15 A17 21 28 B16 A18 22 27 B17 A19 23 26 B18 GND 24 25 B19 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. CAPACITANCE(1) Symbol Parameter CIN Control Input Capacitance CI/O Switch Input/Output Capacitance Conditions(2) Typ. Unit 6 pF Switch Off 12 pF NOTES: 1. Capacitance is characterized but not tested. 2. TA = 25°C, f = 1MHz, VIN = 0V, VOUT = 0V. PIN DESCRIPTION Pin Names xOE Ax Bx Description Output Enable Inputs (Active LOW) A Port Bits B Port Bits FUNCTION TABLE(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, TWO PORT BUS SWITCH WITH RESISTOR INDUSTRIAL TEMPERATURE RANGE DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5.0V ± 10% Symbol Test Conditions(1) Parameter Min. Typ.(2) Max. Unit VIH Control Input HIGH Voltage Guaranteed Logic HIGH for Control Inputs 2 — — V VIL Control Input LOW Voltage Guaranteed Logic LOW for Control Inputs — — 0.8 V IIH Control Input HIGH Current VCC = Max. VI = VCC — — ±1 µA IIL Control Input LOW Current VI = GND — — ±1 — — ±1 — — ±1 IOZH Current During VCC = Max., VO = 0 to 5V µA IOZL Bus Switch Disconnect VIK Clamp Diode Voltage VCC = Min., IIN = –18mA — –0.7 –1.2 V IOFF Switch Power Off Leakage VCC = 0V, VIN or VO ≤ 5.5V — — ±1 µA ICC Quiescent Power Supply Current VCC = Max., VIN = GND or VCC — 0.1 3 µA BUS SWITCH IMPEDANCE OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40°C to +85°C, VCC = 5.0V ±10% Symbol RON IOS Parameter Switch CONNECT Resistance, (2) A to B Short Circuit Current, A to B (3) Test Conditions VIN = 0V, ION = 48mA VIN = 2.4V, ION = 15mA Min. 20 20 Typ. 28 35 A(B) = 0V, B(A) = Vcc 100 — 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 (1) Max. 40 48 Unit Ω — mA IDT74FST1632861 20-BIT, TWO PORT BUS SWITCH WITH RESISTOR INDUSTRIAL TEMPERATURE RANGE POWER SUPPLY CHARACTERISTICS Test Conditions(1) Min. Typ.(2) Max. Unit — 0.5 1.5 mA VIN = VCC VIN = GND — 30 400 µA/ MHz/ Select VCC = Max. Outputs Open VIN = VCC VIN = GND — 0.6 8 mA Two Enable Pins Toggling fi = 10MHz VIN = 3.4V VIN = GND — 0.7 9.5 Symbol Parameter ΔICC Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = 3.4V(3) ICCD Dynamic Power Supply Current(4,5) VCC = Max. Outputs Open Select Input Togging 50% Duty Cycle Total Power Supply Current(6) IC 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 SWITCHING CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 10% VCC = 5V ± 10% Symbol tPLH tPHL tPZH tPZL tPHZ tPLZ |QCI| Description(1) Data Propagation Delay A to B, Y to B(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) VCC = 4V Min. Typ. Max. Max. Unit — — 0.25 0.25 ns 1.5 — 6.5 7 ns 1.5 — 7 7 ns — 1.5 — — pC 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, TWO PORT BUS SWITCH WITH RESISTOR INDUSTRIAL TEMPERATURE RANGE TEST CIRCUITS AND WAVEFORMS VCC 7.0V 500Ω tPLH V OUT VIN Pulse Generator tPHL OUTPUT D.U.T. tPLH 50pF RT 3V 1.5V 0V VOH 1.5V VOL SAME PHASE INPUT TRANSITION 500Ω tPHL 3V 1.5V 0V OPPOSITE PHASE INPUT TRANSITION CL Propagation Delay Test Circuits for All Outputs DATA INPUT SWITCH POSITION Switch TIMING INPUT Open Drain Disable Low Enable Low Closed ASYNCHRONOUS CONTROL All Other Tests Open tREM SYNCHRONOUS CONTROL DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to ZOUT of the Pulse Generator. tH tSU Test 3V 1.5V 0V 3V 1.5V 0V tSU 3V 1.5V 0V 3V 1.5V 0V tH Set-up, Hold, and Release Times VCC ENABLE 1 MHz Signal Generator Enable/Select(1) D.U.T. Switch Out VOUT(3) 3V 1.5V 0V CONTROL INPUT Switch In (2) Switch In (MUX) DISABLE tPZL CL = 50pF OUTPUT NORMALLY LOW Charge Injection OUTPUT NORMALLY HIGH 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 = 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. SWITCH CLOSED tPZH SWITCH OPEN tPLZ 3.5V 3.5V 1.5V 0.3V VOL tPHZ 0.3V 1.5V 0V VOH 0V 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 1.5V tW HIGH-LOW-HIGH PULSE 1.5V Pulse Width 5 IDT74FST1632861 20-BIT, TWO PORT BUS SWITCH WITH RESISTOR INDUSTRIAL TEMPERATURE RANGE ORDERING INFORMATION IDT FST XX Temp. Range XXX Family XXX Device Type XX Package CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 PV PVG PA PAG PF PFG Shrink Small Outline Package SSOP - Green Thin Shrink Small Outline Package TSSOP - Green Thin Very Small Outline Package TVSOP - Green 2861 20-Bit Flow Through Switch with Resistor 163 Double-Density Bus Switch 74 –40°C to +85°C for SALES: 800-345-7015 or 408-284-8200 fax: 408-284-2775 www.idt.com 6 for Tech Support: [email protected]