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| FST3383 10-Bit Low Power Bus Exchange Switch December 1993 Revised December 2000 FST3383 10-Bit Low Power Bus Exchange Switch General Description The FST3383 provides two sets of high-speed CMOS TTLcompatible bus switches. The low on resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. The device operates as a 10-bit bus switch or a 5-bit bus exchanger. The bus exchange (BX) signal provides nibble swapping of the AB and CD pairs of signals. This exchange configuration allows byte swapping of buses in systems. It can also be used as a quad 2-to-1 multiplexer and to create low delay barrel shifters. The bus enable (OE) signal turns the switches ON. Features s 5 switch connection between two ports s Zero propagation delay s Ultra low power with 0.2 A typical ICC s Zero ground bounce in flow-through mode s Control inputs compatible with TTL level Ordering Code: Order Number FST3383WM FST3383QSC FST3383MTC Package Number M24B MQA24 MTC24 Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code. Logic Diagram Connection Diagram Pin Descriptions Pin Names OE BX A0-A4, B0-B4 C0-C4, D0-D4 Description Bus Switch Enable Bus Exchange Buses A, B Buses C, D Truth Table OE H L L BX X L H A0-A4 High-Z State C0-C4 D0-D4 B0-B4 High-Z State D0 - D4 C0-C4 Function Disconnect Connect Exchange (c) 2000 Fairchild Semiconductor Corporation DS011652 www.fairchildsemi.com FST3383 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC ) DC Switch Voltage (VS) DC Input Voltage (VI) (Note 2) DC Input Diode Current (IIN) with VI < 0 DC Output (IO) Sink Current Storage Temperature Range (TSTG) Power Dissipation -0.5V to +7.0V -0.5V to +7.0V -0.5V to +7.0V -20 mA 120 mA Recommended Operating Conditions Supply Voltage (VCC) Free Air Operating Temperature (TA) 4.0V to 5.5V -40C to +85C -65C to +150C 0.5W Note 1: The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Note 2: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. DC Electrical Characteristics Symbol Parameter VCC (V) 4.75 4.75-5.25 4.75-5.25 0 5.25 5.25 4.75 4.75 5.25 5.25 100 5 10 0.2 7 15 10 2.5 2.0 0.8 10 1 10 TA = -40C to +85C Min Typ (Note 3) VIK VIH VIL IIN IOZ IOS RON ICC ICC Maximum Clamp Diode Voltage Minimum High Level Input Voltage Maximum Low Level Input Voltage Maximum Input Leakage Current Maximum 3-STATE I/O Leakage Short Circuit Current Switch On Resistance (Note 4) Maximum Quiescent Supply Current Increase in ICC per Input (Note 5) -1.2 V V V A A mA A mA 0 VIN 5.25V 0 A, B VCC VI(A), VI(B) = 0V, VI(B), VI(A) = 4.75V VI = 0V, ION = 30 mA VI = 2.4V, ION = 15 mA VI = VCC, GND, IO = 0 VIN = 3.15V, IO = 0, Per Control Input IIN = -18 mA Max Units Conditions Note 3: All typical values are at VCC = 5.0V, TA = 25C. Note 4: Measured by voltage drop between A and B pin at indicated current through the switch. On resistance is determined by the lower of the voltages on the two (A or B) pins. Note 5: Per TTL driven input (VIN = 3.15V, control inputs only). A and B pins do not contribute to ICC. www.fairchildsemi.com 2 FST3383 AC Electrical Characteristics Symbol tPLH, tPHL tPLH, tPHL tPZL, tPZH tPLZ, tPHZ Parameter Data Propagation Delay An to Cn, Dn or Bn to Dn, Cn (Note 7) Switch Exchange Time BX to An, Bn, Cn, Dn Switch Enable Time BE to An, Bn, Cn or Dn Switch Disable Time BE to An, Bn, Cn, or Dn VCC (V) TA = -40C to +85C, CL = 50 pF Min Typ (Note 6) 4.75 4.75 4.75 4.75 1.5 1.5 1.5 0.25 6.5 6.5 5.5 ns ns ns ns Max Units Note 6: All typical values are at VCC = 5.0V, TA = 25C. Note 7: This parameter is guaranteed by design but not tested. 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 and alone is of the order of 0.25 ns for 50 pF load. Since this time constant is much smaller than the rise/fall times of typical driving 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. Capacitance (Note 8) Symbol CIN CI/O (OFF) Parameter Control Input Capacitance Input/Output Capacitance Typ 4 9 Max 6 13 Units pF pF Conditions VCC = 5.0V VCC = 5.0V Note 8: Capacitance is characterized but not tested. On-Resistance (RON) vs Input Voltage (VCC = 5.0V) 3 www.fairchildsemi.com FST3383 Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide Package Number M24B 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide Package Number MQA24 www.fairchildsemi.com 4 FST3383 10-Bit Low Power Bus Exchange Switch Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC24 Technology Description The Fairchild Switch family derives from and embodies Fairchild's proven switch technology used for several years in its 74LVX3L384 (FST3384) bus switch product. Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 5 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com www.fairchildsemi.com |
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