FST34170MTD

Revised January 2005 FST34170 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch General Description Features 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. ■ Slower Output Enable times prevent signal disruption 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. ■ Zero bounce in flow-through mode ■ 4: switch connection between two ports ■ Minimal propagation delay through the switch ■ Low lCC ■ Control inputs compatible with TTL level ■ See Applications Note AN-5008 for details Two select (SEL1, SEL2) inputs provide switch enable control. Ordering Code: Package Number Package Description FST34170MTD (Note 1) MTD56 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide FST34170MTDX_NL (Note 2) MTD56 Pb-Free 56-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Order Number Note 1: Devices 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 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch October 2000 FST34170 Logic Diagram Connection Diagram Truth Table Inputs Function SEL1 SEL2 L H xA x B1 H L xA x B2 L L H H www.fairchildsemi.com xA Pin Descriptions x B1 and x B2 Switch Open 2 Pin Name Description SEL1, SEL2 Select Inputs A Bus A B1 , B2 Bus B DC Input Control Pin Voltage (VIN) (Note 5) DC Input Diode Current (lIK) VIN  0V DC Output Current (IOUT) Recommended Operating Conditions (Note 6) Power Supply Operating (VCC) 0.5V to 7.0V 50 mA Storage Temperature Range (TSTG) 0V to 5.5V Output Voltage (VOUT) 0V to 5.5V Input Rise and Fall Time (tr, tf) 128 mA DC VCC/GND Current (ICC/IGND) 4.0V to 5.5V Input Voltage (VIN) Switch Control Input / 100 mA 65qC to 150 qC 0nS/V to 5nS/V Switch I/O 0nS/V to DC 40 qC to 85 qC Free Air Operating Temperature (TA) 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 40 qC to 85 qC TA Symbol VCC Parameter Min Typ (V) Max Units Conditions (Note 7) 1.2 18mA VIK Clamp Diode Voltage VIH HIGH Level Input Voltage 4.0–5.5 VIL LOW Level Input Voltage 4.0–5.5 0.8 V II Input Leakage Current 5.5 r1.0 PA 0 10 PA VIN r1.0 PA 0 d A, d VCC, V 4.5 2.0 V IIN V 0 d VIN d 5.5V 5.5V IOZH, IOZL OFF-STATE Leakage Current 5.5 IOZH, IOZL OFF-STATE Leakage Current 5.5 r1.0 PA 0 d B, d VCC, V RON Switch On Resistance 4.5 4 7 : VIN 0V, IIN 64 mA (Note 8) 4.5 4 7 : VIN 0V, IIN 30 mA 4.5 8 14 : VIN 2.4V, IIN 15 mA 4.0 11 20 : VIN 2.4V, IIN 15 mA VCC or GND, IOUT ICC Quiescent Supply Current 5.5 3 PA VIN ' ICC Increase in ICC per Input 5.5 2.5 mA One input at 3.4V Note 7: Typical values are at VCC 5.0V and TA 0 Other inputs at VCC or GND 25qC Note 8: Measured 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 Absolute Maximum Ratings(Note 3) Supply Voltage (VCC) 0.5V to 7.0V 0.5V to 7.0V DC Switch Voltage (VS) (Note 4) FST34170 AC Electrical Characteristics TA Symbol CL Parameter VCC Min tPHL, tPLH A or B, to B or A (Note 9) tPZH Output Enable Time, SEL to A, B tPZL Output Enable Time, SEL to A, B tPHZ Output Disable Time, SEL to A, B tPLZ Output Disable Time, SEL to A, B 40 qC to 85 qC, 50 pF, RU RD 4.5  5.5V 500: VCC Max Units Conditions Figure No. 4.0V Min Max 0.25 0.25 ns VI OPEN Figures 1, 2 7.0 30.0 35.0 ns VI OPEN for tPZH Figures 1, 2 7.0 30.0 35.0 ns VI 7V for tPZL Figures 1, 2 1.0 6.9 7.3 ns VI OPEN for tPHZ Figures 1, 2 1.0 7.7 7.7 ns VI 7V for tPLZ Figures 1, 2 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) Parameter Typ Max Conditions 4 pF VCC 5.0V Input/Output Capacitance “OFF State” 8 pF VCC 5.0V, Switch OFF 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 Units Control Pin Input Capacitance 1.0 MHz, tW 50 pF 500 ns FIGURE 1. AC Test Circuit FIGURE 2. AC Waveforms www.fairchildsemi.com 4 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: 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. 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. www.fairchildsemi.com 5 www.fairchildsemi.com FST34170 17-Bit to 34-Bit Multiplexer/Demultiplexer Bus Switch Physical Dimensions inches (millimeters) unless otherwise noted