Revised May 1999 FST3383 10-Bit Low Power Bus-Exchange Switch General Description Features 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 (BE) signal turns the switches ON. ■ 5Ω switch connection between two ports ■ Zero propagation delay ■ Ultra low power with 0.2 µA typical ICC ■ Zero ground bounce in flow-through mode ■ Control inputs compatible with TTL level Ordering Code: Order Number Package Number Package Description FST3383WM M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide FST3383QSC MQA24 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide FST3383MTC MTC24 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 Truth Table Pin Names Description BE BX A0–A4 B0–B4 Function BE Bus Switch Enable BX Bus Exchange L L C0–C4 D0 – D4 Connect A0–A4, B0–B4 Buses A, B L H D0–D4 C0–C4 Exchange C0–C4, D0–D4 Buses C, D © 1999 Fairchild Semiconductor Corporation DS011652.prf H X High-Z State High-Z State Disconnect www.fairchildsemi.com FST3383 10-Bit Low Power Bus-Exchange Switch December 1993 FST3383 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC ) −0.5V to +7.0V DC Switch Voltage (VS) −0.5V to +7.0V DC Input Voltage (VI) (Note 2) −0.5V to +7.0V DC Input Diode Current (IIN) with VI < 0 Supply Voltage (VCC) 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. 120 mA −65°C to +150°C Power Dissipation 4.0V to 5.5V −40°C to +85°C Free Air Operating Temperature (TA) −20 mA DC Output (IO) Sink Current Storage Temperature Range (TSTG) Recommended Operating Conditions Note 2: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. 0.5W DC Electrical Characteristics Symbol Parameter VCC (V) TA = −40°C to +85°C Min Typ Max Units −1.2 V Conditions (Note 3) Maximum Clamp Diode Voltage VIH Minimum High Level Input Voltage 4.75–5.25 VIL Maximum Low Level Input Voltage 4.75–5.25 0.8 V IIN Maximum Input 0 10 µA 0 ≤ VIN ≤ 5.25V 5.25 ±1 µA 0 ≤ A, B ≤ VCC Leakage Current 4.75 IIN = −18 mA VIK 2.0 V ±10 IOZ Maximum 3-STATE I/O Leakage 5.25 IOS Short Circuit Current 4.75 RON Switch On Resistance (Note 4) 4.75 5 7 10 ICC Maximum Quiescent Supply Current 5.25 0.2 ∆ICC Increase in ICC per Input (Note 5) 5.25 100 mA VI(A), VI(B) = 0V, VI(B), VI(A) = 4.75V Ω VI = 0V, ION = 30 mA 15 Ω VI = 2.4V, ION = 15 mA 10 µA VI = VCC, GND, IO = 0 2.5 mA VIN = 3.15V, IO = 0, Per Control Input Note 3: All typical values are at VCC = 5.0V, TA = 25°C. 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 Symbol VCC (V) Parameter TA = −40°C to +85°C, CL = 50 pF Min Typ Max Units 0.25 ns (Note 6) tPLH, Data Propagation Delay tPHL An to Cn, Dn or Bn to Dn, Cn (Note 7) tPLH, Switch Exchange Time tPHL BX to An, Bn, Cn, Dn tPZL, Switch Enable Time tPZH BE to An, Bn, Cn or Dn tPLZ, Switch Disable Time tPHZ BE to An, Bn, Cn, or Dn 4.75 4.75 1.5 6.5 ns 4.75 1.5 6.5 ns 4.75 1.5 5.5 ns Note 6: All typical values are at VCC = 5.0V, TA = 25°C. 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) Typ Max Units CIN Symbol Control Input Capacitance Parameter 4 6 pF Conditions VCC = 5.0V CI/O (OFF) Input/Output Capacitance 9 13 pF 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 AC Electrical Characteristics 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 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. 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: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or systems device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the sonably expected to cause the failure of the life support body, or (b) support or sustain life, and (c) whose failure device or system, or to affect its safety or effectiveness. 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 www.fairchildsemi.com user. 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. FST3383 10-Bit Low Power Bus-Exchange Switch Physical Dimensions inches (millimeters) unless otherwise noted (Continued)