FSTD16244MTD

Preliminary FSTD16244 16-Bit Bus Switch with Level Shifting (Preliminary) November 2001 Revised November 2001 FSTD16244 16-Bit Bus Switch with Level Shifting (Preliminary) General Description The Fairchild Switch FSTD16244 provides 16-bits of highspeed CMOS TTL-compatible bus switching. The low On Resistance of the switch allows inputs to be connected to outputs without adding propagation delay or generating additional ground bounce noise. A diode to VCC has been integrated into the circuit to allow for level shifting between 5V inputs and 3.3V outputs. The device is organized as a 16-bit switch. There are four 4-bit switches with separate output enable inputs. When OE is LOW, the switch in ON and Port A is connected to Port B. When OE is HIGH, the switch OFF and a high impedance state exists between the A and B Ports. Features I 4Ω switch connection between two ports. I Minimal propagation delay through the switch. I Low lCC. I Zero bounce in flow-through mode. I Control inputs compatible with TTL level. I TruTranslation voltage translation from 5.0V inputs to 3.3V outputs Ordering Code: Order Number FSTD16244MTD Package Number MTD48 Package Description 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. TruTranslation is trademark of Fairchild Semiconductor Corporation. © 2001 Fairchild Semiconductor Corporation DS500693 www.fairchildsemi.com Preliminary FSTD16244 Connection Diagram Logic Diagram Pin Descriptions Pin Name OEn 1An, 2An, 3An, 4An 1Bn, 2Bn, 3Bn, 4Bn Description Output Enable Input (Active LOW) Bus A Bus B Truth Table Inputs OEx L H H = H IGH Voltage Level L = LOW Voltage Level Outputs A, B A Port = B Port Z Z = High Impedance www.fairchildsemi.com 2 Preliminary FSTD16244 Absolute Maximum Ratings(Note 1) Supply Voltage (VCC) DC Switch Voltage (VS) (Note 2) DC Input Voltage (VIN) (Note 3) DC Input Diode Current (lIK) VIN < 0V DC Output (IOUT) Current DC VCC/GND Current (ICC/IGND) Storage Temperature Range (TSTG) −0.5V to +7.0V −0.5V to +7.0V −0.5V to +7.0V −50mA 128mA Recommended Operating Conditions (Note 4) 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) 0 ns/V to 5 ns/V 0 ns/V to DC -40°C to +85°C 4.5V to 5.5V 0V to 5.5V 0V to 5.5V ±100mA −65°C to +150 °C 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 rating. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Note 2: VS is the voltage observed/applied at either the A or B Ports across the switch. Note 3: The input and output negative voltage ratings may be exceeded if the input and output diode current ratings are observed. Note 4: Unused control inputs must be held HIGH or LOW. They may not float. DC Electrical Characteristics TA = −40°C to +85°C Symbol Parameter VCC (V) VIK VIH VIL VOH II IOZ RON Clamp Diode Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Input Leakage Current OFF-STATE Leakage Current Switch On Resistance (Note 6) ICC Quiescent Supply Current 5.5 10 ∆ ICC Increase in ICC per Input 5.5 2.5 µA mA 4.5 4.5 - 5.5 4.5 - 5.5 4.5 - 5.5 5.5 0 5.5 4.5 4.5 4.5 4 4 35 See Figure 3 ±1.0 ±10 ±1.0 7 7 50 1.5 2.0 0.8 Min Typ (Note 5) −1.2 V V V V µA µA µA Ω Ω Ω mA 0 ≤ VIN ≤ 5.5V VIN = 5.5V 0 ≤ A, B ≤ VCC VIN = 0V, IIN = 64mA VIN = 0V, IIN = 30mA VIN = 2.4V, IIN = 15mA OEn = GND VIN = VCC or GND, IOUT = 0 OEn = VCC VIN = VCC or GND, IOUT = 0 One Input at 3.4V Other Inputs at VCC or GND Note 5: Typical values are at VCC = 5.0V and TA = +25°C Note 6: 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. Max Units Conditions IIN = −18mA 3 www.fairchildsemi.com Preliminary FSTD16244 AC Electrical Characteristics TA = −40 °C to +85 °C, Symbol Parameter CL = 50pF, RU = RD = 500Ω VCC = 4.5 – 5.5V Min tPHL, tPLH tPZH, tPZL tPHZ, tPLZ Propagation Delay Bus-to-Bus (Note 7) Output Enable Time Output Disable Time 1.0 1.0 Max 0.25 5.1 5.4 ns ns ns VI = OPEN VI = 7V for tPZL VI = OPEN for tPZH VI = 7V for tPLZ VI = OPEN for tPHZ Figures 1, 2 Figures 1, 2 Figures 1, 2 Units Conditions Figure Number Note 7: 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 (Note 8) Parameter Typ 3 6 Max Units pF pF Conditions VCC = 5.0V, VIN = 0V VCC, OE = 5.0V, VIN = 0V Control Pin Input Capacitance Input/Output Capacitance “OFF State” Note 8: TA = +25°C, f = 1 MHz, Capacitance is characterized but not tested. AC Loading and Waveforms Note: Input driven by 50Ω source terminated in 50Ω Note: CL includes load and stray capacitance Note: Input PRR = 1.0 MHz, tW = 500 ns FIGURE 1. AC Test Circuit FIGURE 2. AC Waveforms www.fairchildsemi.com 4 Preliminary FSTD16244 Output Voltage HIGH vs. Supply Voltage FIGURE 3. 5 www.fairchildsemi.com Preliminary FSTD16244 16-Bit Bus Switch with Level Shifting (Preliminary) Physical Dimensions inches (millimeters) unless otherwise noted 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide Package Number MTD48 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. www.fairchildsemi.com 6 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