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| Advance Information VS3V253 / VS3V2253 High-speed 3.3V CMOS VSwitch Dual 4:1 Mux/Demux Applications *= *= *= 3.3V to 2.5V translation 2.5V to 1.8V translation Hot-Swapping *= *= Logic replacement Memory bank, video, and audio switching General Description The VS3V253 is a high-speed LVTTL-compatible dual 4:1 multiplexer/demultiplexer. The VS3V2253 contains two mux/demux channels with common path control (S0 & S1) and individual active LOW enables /EA and /EB. The low ON resistance of VS3V253 allows inputs to be connected to outputs without adding propagation delay and without generating additional signal noise. The VS3V2253 has 25 resistors in series with the switches to reduce ground-bounce noise and signal reflections. The VS3V253 and VS3V2253 mux/demux switches are designed for 3.3V to 2.5V, or 2.5V to 1.8V translation, without any external components. These switches also offer very high impedance between switch terminals in the power off or `disabled' state. This feature, combined with near-zero propagation delay in the `on' state, makes VS3V253 and VS3V2253 ideal interface elements for hot-swapping applications. Features *= Enhanced N-FET with no DC path to VCC or GND in normal operating signal voltage range. Low impedance switches connect inputs to outputs with near-zero propagation delay: 5 (VS3V253) and 25 (VS3V2253) Pin-compatible with 74LVC253 or equivalent logic devices Zero added ground bounce or signal noise *= *= *= *= *= Break-before-make feature Undershoot clamp diodes on all switch and control pins ESD rating >2000V (Human Body Model) or >200V (Machine Model) Latch-up current >100mA Available in 150-mil wide QSOP package *= *= *= Figure 1. Functional Block Diagram S0 S1 /E A /E B Figure 2. Pin Configuration QSOP /EA S1 I3A 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC /EB S0 I3B I2B I1B I0B YB I0 A YA I1 A I2 A I3 A I0 B I1 B I2 B I3 B I2A I1A I0A YA GND YB (All Pins Top View) 2000-11-28 Vaishali Semiconductor 1300 White Oaks Road Page 1 Campbell CA 95008 Ph. 408.377.6060 MDSS-0003-01 Fax 408.377.6063 VS3V253/VS3V2253 Table 1. Pin Description Name I/O Description IXA, IXB S0, S1 /EA, /EB YA - YB I/O I I I/O Data Input or Output Select Input Enable Input Data Output or Input Advance Information Table 2. Function Table Inputs Select /EA /EB S1 S0 H X L L L L X H L L L L X X L L H H X X L H L H X I0A I1A I2A I3A Outputs YA Hi-Z X Hi-Z I0B I1B I2B I3B Function YB Disable A Disable B S1-0 = 0 S1-0 = 1 S1-0 = 2 S1-0 = 3 Table 3. Absolute Maximum Ratings Supply Voltage to Ground....................................-0.5V to +4.6V DC Switch Voltage VS.........................................-0.5V to +4.6V DC Input Voltage VIN..........................................-0.5V to +4.6V AC Input Voltage (Pulse Width < 20ns)...............................-3.0V DC Output Sink Current per Switch Pin.............................128 mA Maximum Power Dissipation.......................................0.5 Watts Storage Temperature.......................................-65 C to +150 C Note ABSOLUTE MAXIMUM CONTINUOUS RATINGS are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Correct functional operation while operating in the absolute maximum rated conditions is not implied. o o Table 4. Capacitance TA = 25 C, f = 1 MHz, VIN = 0V, VOUT = 0V o QSOP Pins Control Inputs VSwitch Channels (Switch OFF) Demux Mux Operation Typ 4 5 7 Max 5 7 8 Unit pF pF pF Note Capacitance is guaranteed, but not production tested. Total capacitance of a path, when the switch is closed, is the sum of the switch terminal capacitances. 2000-11-28 Vaishali Semiconductor 1300 White Oaks Road Page 2 Campbell CA 95008 Ph. 408.377.6060 MDSS-0003-01 Fax 408.377.6063 VS3V253/VS3V2253 Table 5. Recommended Operating Conditions Symbol VCC VIL VIH TA Advance Information Parameter Power supply voltage Low level input voltage (Control inputs) High level input voltage (Control inputs) Operating free-air temperature Conditions Vcc = 2.3 to 2.7 Vcc =2.7 to 3.6 Vcc = 2.3 to 2.7 Vcc = 2.7 to 3.6 Min 2.3 Typ Max 3.6 0.7 0.8 V V V 85 o Units 1.7 2.0 -40 C Note: All unused control inputs of the device must be held at Vcc or GND, to ensure proper device operation Table 6. Electrical Characteristics Over Recommended Operating Free-air Temperature Range Symbol VIK VOH II |OFF| |IOZ| IODL IODH RON Parameter Clamp Voltage Logic High Voltage Input Leakage Current Power OFF Leakage Current OFF State Leakage Current Switch I/O Drive Current (Logic LOW) Switch I/O Drive Current (Logic HIGH) Switch ON (1) Resistance Control Inputs Switch I/O Switch I/O Control Inputs Control Inputs Switch I/O Switch I/O Test Conditions VCC = Min, IIK = -18 mA VIN = VCC = 3.3V, IOUT = -100A VIN = VCC = 2.5V, IOUT = -100A VCC = Max, VI = VCC or GND VCC = 0, VI or VO = VCC or GND VCC = Max, VI/O = VCC, /EA = /EB = VCC VCC = 3.0V, VIN = 0, VOUT = 0.7V VCC = 3.0V, VIN = VCC, VOUT = 1.8V VCC = 3.0V, VIN = 0, IOUT = 15mA VCC = 2.3V, VIN = 0V, IOUT = 8mA VS3V253 VS3V2253 VS3V253 VS3V2253 VS3V253 VS3V2253 VS3V253 VS3V2253 Min Typ Max -1.5 -1.5 Units V V A A A mA mA mA mA 2.3 1.5 2.7 2.0 1 1 1 50 30 -50 -20 5 20 (2) (2) (3) (3) 7 40 14 48 28 10 23 35 Notes: 1. 2. 3. RON is measured by forcing specified current into the `output' node of the switch with the `input' node of the switch at the specified voltage. o Typical value is specified at VCC = 3.3V and TA = 25 C. o Typical value is specified at VCC = 2.5V and TA = 25 Table 7. Power Supply Characteristics Over Recommended Operating Free-air Temperature Range Symbol ICCQ ICC QCCD Parameter Quiescent Power Supply Current (2) Test Conditions VCC = 3.6V, VCC = 3.6V, VIN = 3.0V, f = 0 VCC = 2.7V, VIN = 2.0V, f = 0 VCC = Max, Switch pins open, (1) Max 1 300 0.15 Units A A mA/MHz SX, /EX = VCC or GND, f = 0 Power Supply Current per Input High (Control Inputs) Dynamic Power Supply Current (3) Control Inputs toggling at 50% duty cycle Notes: 1. 2. 3. For conditions shown as Min or Max, use the appropriate values per Recommended Operating Conditions. Per control input. All other control inputs at GND. Switch I/O pins do not contribute to ICC. This parameter represents the average DC current resulting from the switching of internal nodes of the device at a given frequency. The switch I/O pins make insignificant contribution to the dynamic power supply current of the device. This parameter is guaranteed, but not production tested. 2000-11-28 Vaishali Semiconductor 1300 White Oaks Road Page 3 Campbell CA 95008 Ph. 408.377.6060 MDSS-0003-01 Fax 408.377.6063 VS3V253/VS3V2253 Advance Information VOLTAGE TRANSLATION 4 3 3 Vcc=3.6V Vcc=3.5V Vcc=3.3V Vcc=3.3V Vcc=3.0V Vcc=3.0V 2 Vcc=2.7V Vcc=2.5V Vcc=2.3V 2 VOUT (V) VOUT (V) 1 1 0 1 2 3 VIN (V) 4 1 2 VIN (V) 3 Figure 3. 3.3V to 2.5V Translation (TA + 25 C) Figure 4. 2.5V to 1.8V Translation (TA + 25 C) VOH CHARACTERISTICS 3.0 3.0 2.0 2.0 VOH (V) VOH (V) 1.0 1.0 0 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 0 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Supply Voltage - VCC (V) (TA + 25 C) Supply Voltage - VCC (V) (TA + 25 C) Figure 5. VOH CHARACTERISTICS (Vcc = 3.3V nominal) Figure 6. VOH CHARACTERISTICS (Vcc = 2.5V nominal) 2000-11-28 Vaishali Semiconductor 1300 White Oaks Road Page 4 Campbell CA 95008 Ph. 408.377.6060 MDSS-0003-01 Fax 408.377.6063 VS3V253/VS3V2253 Advance Information Table 8. Switching Characteristics Over Operating Range - 3.3V Supply Voltage TA = -40 C to +85 C, VCC = 3.3V + 0.3V CLOAD = 30pF, RLOAD = 500 unless otherwise stated. o o Symbol tPLH, tPHL tPZH, tPZL tPZH, tPZL tPLZ, tPHZ Description Data Propagation Delay (2,3) (1) Min 0.5 0.5 0.5 (3) VS3V253 Max 0.25 5.2 4.8 5.0 VS3V2253 (3) Min Max 1.25 0.5 0.5 0.5 6.2 5.8 5.0 Units ns ns ns ns through the switch Switch Turn-on Delay, S0 or S1 to YX, IXX Switch Turn-on Delay, /EA or /EB to YX, IXX Switch Turn-off Delay (3) , SX or /EX to YX, IXX Table 9. Switching Characteristics Over Operating Range - 2.5V Supply Voltage TA = -40 C to +85 C, VCC = 2.5V + 0.2V CLOAD = 30pF, RLOAD = 500 unless otherwise stated. o o Symbol tPLH, tPHL tPZH, tPZL tPZH, tPZL tPLZ, tPHZ Description (1) Min (3) VS3V253 Max VS3V2253 (3) Min Max Units ns ns ns ns Data Propagation Delay (2,3) through the switch Switch Turn-on Delay, S to YX, I0X, or IX Switch Turn-on Delay, /E to YX, I0X, or IX Switch Turn-off Delay (3) , S or /E to YX, I0X, or IX Notes: 1. 2. See test circuits and waveforms. This parameter is the calculated theoretical RC time constant of ON-state resistance of the switch and the specified load capacitance when driven by an ideal voltage source (zero source impedance). This time-constant is on the order of 0.25 ns for VS3V253 and 1.25 ns for VS3V2253. Since this time-constant is much smaller than rise/fall times of typical driving signals, it adds very little propagation delay to the system. This parameter is guaranteed, but not production tested. 3. Figure 7. AC Test Circuit and Switching Waveforms AC Test Circuit3.3V Supply Voltage S1 5V 500 RL 450 50 CL 50 =Coax to Oscilloscope Load Switch Position TEST tPLH, tPHL tPLZ, tPZL tPHZ, tPZH Open Closed Open S1 Pulse Generator VIN DUT VOUT Input Conditions Input voltage = 0 V to 3.0 V tr = tf = 2.5ns (10% to 90%) Switching Waveforms 2000-11-28 Vaishali Semiconductor 1300 White Oaks Road Page 5 Campbell CA 95008 Ph. 408.377.6060 MDSS-0003-01 Fax 408.377.6063 VS3V253/VS3V2253 Advance Information 3.0 V Input 1.5 V 0V tPLH Switch Output tPHL VOH 1.2 V VOL Propagation Delay Control Input 3.0 V 1.5 V 0V tPHZ tPZH VOH 1.2 V 0V tPLZ tPZL 0.3 V Switch ON Switch OFF 3.5 V 1.2 V VOL 0.3 V Switch Output (Switch Input = 3.0 V) Switch Output (Switch Input = 0 V) Switch ON Enable and Disable Times Ordering Information Part Number VS3V253Q VS3V253QX VS3V2253Q VS3V2253QX Marking VS3V253Q VS3V253Q VS3V2253Q VS3V2253Q Shipping/Packaging Tubes Tape & Reel Tubes Tape & Reel No. of Pins 16 16 16 16 Package QSOP QSOP QSOP QSOP Temperature -40C to +85C -40C to +85C -40C to +85C -40C to +85C 2000-11-28 Vaishali Semiconductor 1300 White Oaks Road Page 6 Campbell CA 95008 Ph. 408.377.6060 MDSS-0003-01 Fax 408.377.6063 |
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