IDT74FST6800 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS INDUSTRIAL TEMPERATURE RANGE 10-BIT BUS SWITCH IDT74FST6800 WITH PRECHARGED OUTPUTS FEATURES: DESCRIPTION: The FST6800 belongs to IDT s family of Bus switches. Bus switch devices Bus switches provide zero delay paths perform the function of connecting or isolating two ports without providing Low switch on-resistance: 7 any inherent current sink or source capability. Thus they generate little or TTL-compatible input and output levels no noise of their own while providing a low resistance path for an external ESD > 2000V per MIL-STD-883, Method 3015 > 200V using driver. These devices connect input and output ports through an n-channel machine model (C = 200pF, R = 0) FET. When the gate-to-source junction of this FET is adequately forward- Available in QSOP and TSSOP packages 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 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 10K resistor. FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATION BIASV ON 1 24 VCC A1 2 23 B1 A2 3 22 B2 A3 4 21 B3 A4 5 20 B4 A5 6 19 B5 A1 B1 A6 7 18 B6 A7 8 17 B7 A8 9 16 B8 A9 10 15 B9 A10 B10 A10 11 14 B10 GND 12 13 BIASV ON QSOP / TSSOP TOP VIEW The IDT logo is a registered trademark of Integrated Device Technology, Inc. INDUSTRIAL TEMPERATURE RANGE APRIL 2015 1 2015 Integrated Device Technology, Inc. DSC-5519/5IDT74FST6800 INDUSTRIAL TEMPERATURE RANGE 10-BIT BUS SWITCH WITH PRECHARGED OUTPUTS (1) ABSOLUTE MAXIMUM RATINGS PIN DESCRIPTION Symbol Description Max Unit Pin Names I/O Description (2) VTERM Terminal Voltage with Respect to GND 0.5 to +7 V A1-10, B1-10 I/O Buses A, B TSTG Storage Temperature 65 to +150 C ON I Bus Switch Enable (Active LOW) BIASV I BIAS Voltage IOUT Maximum Continuous Channel Current 128 mA 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. (1) 2. Vcc, Control, and Switch terminals. FUNCTION TABLE ON B1-10 Description (1) CAPACITANCE LA1-10 Connect (2) Symbol Parameter Conditions Typ. Unit H BIASV Precharge CIN Control Input Capacitance 4 pF NOTE: 1. H = HIGH Voltage Level CI/O Switch Input/Output Capacitance Switch Off pF L = LOW Voltage Level NOTES: 1. Capacitance is characterized but not tested. 2. TA = 25C, f = 1MHz, VIN = 0V, VOUT = 0V. DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = 40C to +85C, VCC = 5.0V 5%, BIASV = 0 to VCC (1) (2) Symbol Parameter Test Conditions Min. Typ. 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 VCC = Max. VI = VCC 1 A IIL Input LOW Current VI = GND 1 IO Precharge Output Current VCC = Min., BIASV = 2.4V, VO = 0V 0.15 mA IOZH High Impedance Output Current VCC = Max. VO = VCC 1 A IOZL (3-State Output Pins) VO = GND 1 (3) IOS Short Circuit Current VCC = Min., VO = GND 300 mA VIK Clamp Diode Voltage VCC = Min., IIN = 18mA 0.7 1.2 V (4) RON Switch On Resistance VCC = 4.75V, VIN = 0.0V ION = 64mA 7 VCC = 4.75V, VIN = 2.4V ION = 15mA 15 IOFF Input/Output Power Off Leakage VCC = 0V, VIN or VO 4.5V 1 A ICC Quiescent Power Supply Current VCC = Max., VI = GND or VCC 0.1 3 A 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, +25C 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. 2