74FST6800PGG

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INDUSTRIAL TEMPERATURE RANGE IDT74FST6800 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS APRIL 2015INDUSTRIAL TEMPERATURE RANGE The IDT logo is a registered trademark of Integrated Device Technology, Inc. © 2015 Integrated Device Technology, Inc. DSC-5519/5 FEATURES:

• Bus switches provide zero delay paths
• Low switch on-resistance: 7 ΩΩΩΩΩ
• TTL-compatible input and output levels
• ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0)
• Available in QSOP and TSSOP packages FUNCTIONAL BLOCK DIAGRAM QSOP / TSSOP TOP VIEW PIN CONFIGURATION IDT74FST680010-BIT BUS SWITCH WITH PRECHARGED OUTPUTS DESCRIPTION: The FST6800 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 gate-to-source junction of the FET, the FET is turned off, therefore with no V CC 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 FST6800 provides a 10-Bit TTL-compatible interface. The ON pin serves as the enable pin. When ON is high, A and B ports are isolated and B outputs are precharged to the BIASV voltage, through the equivalent of a 10KΩ resistor. A10 B10 BIASV ON A10 GND VCC B10 BIASV ON

INDUSTRIAL TEMPERATURE RANGE IDT74FST6800 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS Symbol Description Max Unit VTERM(2) Terminal Voltage with Respect to GND –0.5 to +7 V TSTG Storage Temperature –65 to +150 °C IOUT Maximum Continuous Channel Current 128 mA ABSOLUTE MAXIMUM RATINGS(1) 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. Symbol Parameter Conditions(2) Typ. Unit CIN Control Input Capacitance 4 pF CI/O Switch Input/Output Capacitance Switch Off pF CAPACITANCE(1) NOTES: 1. Capacitance is characterized but not tested. 2. T A = 25°C, f = 1MHz, V IN = 0V, V OUT = 0V. Pin Names I/O Description A1-10, B1-10 I/O Buses A, B ON I Bus Switch Enable (Active LOW) BIASV I BIAS Voltage PIN DESCRIPTION NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level FUNCTION TABLE(1) ON B1-10 Description LA 1-10 Connect H BIASV Precharge Symbol Parameter Test Conditions (1) Min. Typ. (2) Max. Unit VIH Input HIGH Voltage Guaranteed Logic HIGH for Control Inputs 2 — — V VIL Input LOW Voltage Guaranteed Logic LOW for Control Inputs — — 0.8 V IIH Input HIGH Current V CC = Max. V I = VCC —— ±1 μA IIL Input LOW Current V I = GND — — ±1 IO Precharge Output Current V CC = Min., BIASV = 2.4V, V O = 0V 0.15 — — mA IOZH High Impedance Output Current V CC = Max. V O = VCC —— ±1 μA IOZL (3-State Output Pins) V O = GND — — ±1 IOS Short Circuit Current V CC = Min., V O = GND(3) — 300 — mA VIK Clamp Diode Voltage V CC = Min., IIN = –18mA — –0.7 –1.2 V RON Switch On Resistance(4) VCC = 4.75V, VIN = 0.0V ION = 64mA — — 7 Ω VCC = 4.75V, VIN = 2.4V I ON = 15mA — — 15 IOFF Input/Output Power Off Leakage V CC = 0V, VIN or VO ≤ 4.5V — — 1 μA ICC Quiescent Power Supply Current V CC = Max., V I = GND or V CC — 0.1 3 μA DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, VCC = 5.0V ± 5%, BIASV = 0 to VCC NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable dev ice type. 2. Typical values are at V CC = 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.

INDUSTRIAL TEMPERATURE RANGE IDT74FST6800 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit ΔICC Quiescent Power Supply Current V CC = Max. — 0.5 1.5 mA TTL Inputs HIGH V IN = 3.4V(3) ICCD Dynamic Power Supply V CC = Max., Outputs Open V IN = VCC —3 0 4 0 μA/ Current(4) Enable Pin Toggling V IN = GND MHz/ 50% Duty Cycle Enable IC Total Power Supply Current(6) VCC = Max., Outputs Open V IN = VCC —34 m A Enable Pin Toggling V IN = GND (Ten Switches Toggling) fi = 10MHz V IN = 3.4V — 3.3 4.8 50% Duty Cycle V IN = GND POWER SUPPLY CHARACTERISTICS NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable dev ice type. 2. Typical values are at V CC = 5.0V, +25°C ambient. 3. Per TTL driven input (V IN = 3.4V). All other inputs at V CC 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 Icc formula. These limits are guaranteed but not tested. 6. I C = IQUIESCENT + IINPUTS + IDYNAMIC IC = I CC + ΔICC DHNT + I CCD (fiN) ICC = Quiescent Current ΔICC = Power Supply Current for a TTL High Input (V IN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at D H ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (zero for non-register devices) fi = Input Frequency N = Number of SwitchesToggling at f i All currents are in milliamps and all frequencies are in megahertz SWITCHING CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40°C to +85°C, VCC = 5.0V ± 5% Symbol Description Condition(1) Min.(2) Typ. Max. Unit tPLH Data Propagation Delay C L = 50pF — — 0.25 ns tPHL Ax, Bx to Bx, Ax (3,4) RL = 500Ω tPZH Switch Turn On Delay 1.5 — 6.5 ns tPZL ON to Ax, Bx tPHZ Switch Turn Off Delay 1.5 — 5.5 ns tPLZ ON to Ax, Bx (3) 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 capac itance. The time constant for the switch alone is of the order of 0.25 ns for 50 pF load. Since this time is constant and much smaller than the rise/fall times of typical dr iving signals, it adds very little propagation delay to the system. Propagation delay of 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.

INDUSTRIAL TEMPERATURE RANGE IDT74FST6800 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS Pulse Generator R T D.U.T VCC VIN C L VOUT 50pF 500 500 7.0V 1.5V 1.5V 1.5V 1.5V DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL tSU tH tREM tSU tH HIGH-LOW-HIGH PULSE LOW-HIGH-LOW PULSE tW 1.5V 1.5V SAME PHASE INPUT TRANSITION 1.5V 1.5V VOH tPLH OUTPUT OPPOSITE PHASE INPUT TRANSITION 1.5V tPLH tPHL tPHL VOL CONTROL INPUT 1.5V 3.5V OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED SWITCH OPEN VOL 0.3V 0.3V tPLZtPZL tPZH tPHZ 3.5V 1.5V 1.5V ENABLE DISABLE VOH PRESET CLEAR CLOCK ENABLE ETC. Octal Link Octal Link Octal Link Octal Link Octal Link TEST CIRCUITS AND WAVEFORMS Propagation Delay Test Circuits for All Outputs Enable and Disable Times Set-up, Hold, and Release Times Pulse Width NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. Test Switch Open Drain Disable Low Closed Enable Low All Other Tests Open SWITCH POSITION DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to Z OUT of the Pulse Generator.

INDUSTRIAL TEMPERATURE RANGE IDT74FST6800 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS

ORDERING INFORMATION

PackageDevice TypeTemp. Range QG PGG Quarter-size Small Outline Package - Green Thin Shrink Small Outline Package - Green 10-Bit Bus Switch with Precharged Outputs –40°C to +85°C 6800 X Blank Tube or Tray Tape and Reel CORPORATE HEADQUARTERS for SALES: for Tech Support: 6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 logichelp@idt.com San Jose, CA 95138 fax: 408-284-2775 www.idt.com Datasheet Document History 04/16/2015 Pg. 5 Updated the ordering information by removing the "IDT" notation, non RoHS part and by adding Tape and Reel information.