FST34170

FST34170 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch October 2000 Revised January 2005 FST34170 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch General Description The Fairchild Switch FST34170 is a 17-bit to 34-bit highspeed CMOS TTL-compatible multiplexer/demultiplexer bus switch. 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 can be used in applications where two buses need to be addressed simultaneously. The FST34170 is designed so that the A Port demultiplexes into B1 or B2 or both. Two select (SEL1, SEL2) inputs provide switch enable control. Features ■ Slower Output Enable times prevent signal disruption ■ 4: switch connection between two ports ■ Low lCC ■ Zero bounce in flow-through mode ■ Control inputs compatible with TTL level ■ See Applications Note AN-5008 for details ■ Minimal propagation delay through the switch Ordering Code: Order Number FST34170MTD (Note 1) FST34170MTDX_NL (Note 2) Package Number MTD56 MTD56 Package Description 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Pb-Free 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Note 1: D evices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Note 2: “_NL” indicates Pb-Free product (per JEDEC J-STD-020B). Device is available in Tape and Reel only. UHC¥ is a trademark of Fairchild Semiconductor Corporation. © 2005 Fairchild Semiconductor Corporation DS500450 www.fairchildsemi.com FST34170 Logic Diagram Connection Diagram Truth Table Inputs SEL1 L H L H SEL2 H L L H xA Function xA xA x B1 x B2 Pin Descriptions Pin Name SEL1, SEL2 A B1 , B2 Description Select Inputs Bus A Bus B x B1 and x B2 Switch Open www.fairchildsemi.com 2 FST34170 Absolute Maximum Ratings(Note 3) Supply Voltage (VCC) 0.5V to 7.0V 0.5V to 7.0V DC Switch Voltage (VS) (Note 4) DC Input Control Pin Voltage DC Input Diode Current (lIK) VIN  0V DC Output Current (IOUT) DC VCC/GND Current (ICC/IGND) Storage Temperature Range (TSTG) (VIN) (Note 5) Recommended Operating Conditions (Note 6) Power Supply Operating (VCC) Input Voltage (VIN) Output Voltage (VOUT) Input Rise and Fall Time (tr, tf) Switch Control Input Switch I/O Free Air Operating Temperature (TA) 0nS/V to 5nS/V 0nS/V to DC 4.0V to 5.5V 0V to 5.5V 0V to 5.5V 0.5V to 7.0V 50 mA / 100 mA 65qC to 150 qC 128 mA 40 qC to 85 qC Note 3: 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 rating. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Note 4: VS is the voltage observed/applied at either the A or B Ports across the switch. Note 5: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. Note 6: Unused control inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics TA Symbol Parameter VCC (V) VIK VIH VIL II IOZH, IOZL IOZH, IOZL RON Clamp Diode Voltage HIGH Level Input Voltage LOW Level Input Voltage Input Leakage Current OFF-STATE Leakage Current OFF-STATE Leakage Current Switch On Resistance (Note 8) 4.5 4.0–5.5 4.0–5.5 5.5 0 5.5 5.5 4.5 4.5 4.5 4.0 ICC Quiescent Supply Current Increase in ICC per Input 5.0V and TA 40 qC to 85 qC Typ (Note 7) Max Units Conditions Min 1.2 2.0 0.8 V V V IIN 18mA r1.0 10 PA PA PA PA : : : : PA mA 0 d VIN d 5.5V VIN 5.5V 0 d A, d VCC, V 0 d B, d VCC, V VIN VIN VIN VIN VIN 0V, IIN 0V, IIN 2.4V, IIN 2.4V, IIN 64 mA 30 mA 15 mA 15 mA 0 r1.0 r1.0 4 4 8 11 7 7 14 20 3 2.5 5.5 5.5 VCC or GND, IOUT ' ICC One input at 3.4V Other inputs at VCC or GND Note 7: Typical values are at VCC 25qC Note 8: M easured by the voltage drop between A and B pins at the indicated current through the switch. On resistance is determined by the lower of the voltages on the two (A or B) pins. 3 www.fairchildsemi.com FST34170 AC Electrical Characteristics TA Symbol Parameter VCC Min tPHL, tPLH tPZH tPZL tPHZ tPLZ A or B, to B or A (Note 9) Output Enable Time, SEL to A, B Output Enable Time, SEL to A, B Output Disable Time, SEL to A, B Output Disable Time, SEL to A, B 7.0 7.0 1.0 1.0 CL 40 qC to 85 qC, 500: 4.0V Max 0.25 35.0 35.0 7.3 7.7 ns ns ns ns ns VI VI VI VI VI OPEN OPEN for tPZH 7V for tPZL OPEN for tPHZ 7V for tPLZ Figures 1, 2 Figures 1, 2 Figures 1, 2 Figures 1, 2 Figures 1, 2 Units Conditions Figure No. VCC Min 50 pF, RU RD 4.5  5.5V Max 0.25 30.0 30.0 6.9 7.7 Note 9: This parameter is guaranteed by design but is not tested. The bus switch contributes no propagation delay other than the RC delay of the typical On resistance of the switch and the 50pF load capacitance, when driven by an ideal voltage source (zero output impedance). Capacitance Symbol CIN CI/O OFF Note 10: TA (Note 10) Typ 4 8 Max Units pF pF VCC VCC Conditions 5.0V 5.0V, Switch OFF Parameter Control Pin Input Capacitance Input/Output Capacitance “OFF State” 25qC, f 1 MHz, Capacitance is characterized but not tested. AC Loading and Waveforms Note: Input driven by 50: source terminated in 50: Note: CL includes load and stray capacitance, C L Note: Input PRR 1.0 MHz, tW 500 ns 50 pF FIGURE 1. AC Test Circuit FIGURE 2. AC Waveforms www.fairchildsemi.com 4 FST34170 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch Physical Dimensions inches (millimeters) unless otherwise noted 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Package Number MTD56 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