Advance Information VS3V253 / VS3V2253 High-speed 3.3V CMOS VSwitch Dual 4:1 Mux/Demux Applications •= 3.3V to 2.5V translation •= Logic replacement •= 2.5V to 1.8V translation •= •= Hot-Swapping 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 25Ω 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. •= Break-before-make feature •= •= Undershoot clamp diodes on all switch and control pins Low impedance switches connect inputs to outputs with near-zero propagation delay: 5Ω (VS3V253) and 25Ω (VS3V2253) •= ESD rating >2000V (Human Body Model) or >200V (Machine Model) •= Pin-compatible with 74LVC253 or equivalent logic devices •= Latch-up current >100mA •= Available in 150-mil wide QSOP package •= Zero added ground bounce or signal noise Figure 1. Functional Block Diagram Figure 2. Pin Configuration S0 QSOP S1 /E A /E B I0 A I1 A I2 A YA I3 A I0 B I1 B I2 B I3 B YB 2000-11-28 Page 1 /EA S1 1 16 VCC 2 15 /EB I3A 3 14 S0 I2A I1A I0A 4 13 I3B 5 6 12 11 YA 7 10 I2B I1B I0B GND 8 9 YB (All Pins Top View) MDSS-0003-01 Vaishali Semiconductor 1300 White Oaks Road Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063 VS3V253/VS3V2253 Advance Information Table 1. Pin Description Name I/O Description IXA, IXB I/O Data Input or Output S0, S1 I Select Input /EA, /EB I Enable Input YA - YB I/O Data Output or Input Table 2. Function Table Inputs Select /EA /EB S1 S0 Outputs YA Function YB H X X X Hi-Z X Disable A X H X X X Hi-Z Disable B L L L L I0A I0B S1-0 = 0 L L L H I1A I1B S1-0 = 1 L L H L I2A I2B S1-0 = 2 L L H H I3A I3B 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 o o 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. Table 4. Capacitance o TA = 25 C, f = 1 MHz, VIN = 0V, VOUT = 0V QSOP Pins Operation Control Inputs Typ Max Unit 4 5 pF VSwitch Channels Demux 5 7 pF (Switch OFF) Mux 7 8 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 Page 2 MDSS-0003-01 Vaishali Semiconductor 1300 White Oaks Road Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063 VS3V253/VS3V2253 Advance Information Table 5. Recommended Operating Conditions Symbol VCC Parameter Conditions Min Power supply voltage VIL VIH TA Typ Max 2.3 V V Low level input voltage Vcc = 2.3 to 2.7 0.7 (Control inputs) Vcc =2.7 to 3.6 0.8 High level input voltage Vcc = 2.3 to 2.7 1.7 (Control inputs) Vcc = 2.7 to 3.6 2.0 Operating free-air temperature Units 3.6 V -40 o 85 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 Parameter Clamp Voltage Test Conditions Control Inputs Min Typ VCC = Min, IIK = -18 mA Switch I/O VOH Logic High Voltage Switch I/O Max Units -1.5 V -1.5 VIN = VCC = 3.3V, IOUT = -100µA 2.3 2.7 VIN = VCC = 2.5V, IOUT = -100µA 1.5 2.0 V II Input Leakage Current Control Inputs VCC = Max, VI = VCC or GND 1 µA |OFF| Power OFF Leakage Current Control Inputs VCC = 0, VI or VO = VCC or GND 1 µA VCC = Max, VI/O = VCC, 1 µA Switch I/O |IOZ| OFF State Leakage Current Switch I/O IODL Switch I/O Drive Current (Logic LOW) VCC = 3.0V, VIN = 0, VS3V253 50 mA VOUT = 0.7V VS3V2253 30 mA IODH RON Switch I/O Drive Current (Logic HIGH) Switch ON (1) Resistance /EA = /EB = VCC VCC = 3.0V, VIN = VCC, VS3V253 -50 mA VOUT = 1.8V VS3V2253 -20 mA VCC = 3.0V, VIN = 0, VS3V253 IOUT = 15mA VS3V2253 VCC = 2.3V, VIN = 0V, IOUT = 8mA 20 VS3V253 VS3V2253 23 (2) 7 Ω 28 (2) 40 Ω 10 (3) 14 Ω 35 (3) 48 Ω 5 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 Test Conditions Quiescent Power Supply Current VCC = 3.6V, Power Supply Current per Input High (Control Inputs) VCC = 3.6V, VIN = 3.0V, f = 0 (2) Dynamic Power Supply Current (3) (1) SX, /EX = VCC or GND, f = 0 Max Units 1 µA 300 µA 0.15 mA/MHz VCC = 2.7V, VIN = 2.0V, f = 0 VCC = Max, Switch pins open, 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 Page 3 MDSS-0003-01 Vaishali Semiconductor 1300 White Oaks Road Campbell CA 95008 Ph. 408.377.6060 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 2 Vcc=2.7V Vcc=2.5V Vcc=2.3V VOUT VOUT (V) (V) 1 1 0 1 2 2 VIN (V) 1 4 3 VIN (V) Figure 3. 3.3V to 2.5V Translation 3 Figure 4. 2.5V to 1.8V Translation (TA + 25 °C) (TA + 25 °C) VOH CHARACTERISTICS 3.0 3.0 2.0 2.0 VOH VOH (V) (V) 1.0 1.0 0 0 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 2.2 Supply Voltage – VCC (V) (TA + 25 °C) 2.4 2.5 2.6 2.7 Supply Voltage – VCC (V) (TA + 25 °C) Figure 5. VOH CHARACTERISTICS (Vcc = 3.3V nominal) 2000-11-28 2.3 Figure 6. VOH CHARACTERISTICS (Vcc = 2.5V nominal) Page 4 MDSS-0003-01 Vaishali Semiconductor 1300 White Oaks Road Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063 2.8 VS3V253/VS3V2253 Advance Information Table 8. Switching Characteristics Over Operating Range – 3.3V Supply Voltage o o TA = -40 C to +85 C, VCC = 3.3V + 0.3V CLOAD = 30pF, RLOAD = 500Ω unless otherwise stated. Symbol Description (2,3) (1) Min VS3V253 Max (3) tPLH, tPHL Data Propagation Delay tPZH, tPZL Switch Turn-on Delay, S0 or S1 to YX, IXX 0.5 5.2 tPZH, tPZL Switch Turn-on Delay, /EA or /EB to YX, IXX 0.5 0.5 tPLZ, tPHZ Switch Turn-off Delay through the switch (3) , SX or /EX to YX, IXX VS3V2253 (3) Min Max 0.25 Units 1.25 ns 0.5 6.2 ns 4.8 0.5 5.8 ns 5.0 0.5 5.0 ns Table 9. Switching Characteristics Over Operating Range – 2.5V Supply Voltage o o TA = -40 C to +85 C, VCC = 2.5V + 0.2V CLOAD = 30pF, RLOAD = 500Ω unless otherwise stated. Symbol Description (1) Min VS3V253 Max (3) VS3V2253 (3) Min Max Units tPLH, tPHL Data Propagation Delay (2,3) through the switch ns tPZH, tPZL Switch Turn-on Delay, S to YX, I0X, or IX ns tPZH, tPZL Switch Turn-on Delay, /E to YX, I0X, or IX ns tPLZ, tPHZ Switch Turn-off Delay (3) , S or /E to YX, I0X, or IX ns Notes: 1. 2. 3. 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. Figure 7. AC Test Circuit and Switching Waveforms AC Test Circuit3.3V Supply Voltage Load Switch Position S1 5V VIN Pulse Generator VOUT 500Ω S1 tPLH, tPHL Open tPLZ, tPZL Closed tPHZ, tPZH Open RL DUT 450 Ω 50Ω TEST CL Input Conditions 50 Ω=Coax to Oscilloscope Input voltage = 0 V to 3.0 V tr = tf = 2.5ns (10% to 90%) Switching Waveforms 2000-11-28 Page 5 MDSS-0003-01 Vaishali Semiconductor 1300 White Oaks Road Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063 VS3V253/VS3V2253 Advance Information 3.0 V Input 1.5 V 0V tPLH tPHL VOH Switch Output 1.2 V VOL Propagation Delay 3.0 V 1.5 V Control Input 0V tPZH tPHZ VOH 0.3 V Switch Output (Switch Input = 3.0 V) 1.2 V 0V tPLZ Switch Output (Switch Input = 0 V) tPZL 0.3 V Switch ON Switch OFF 3.5 V 1.2 V VOL Switch ON Enable and Disable Times Ordering Information Part Number VS3V253Q VS3V253QX VS3V2253Q VS3V2253QX 2000-11-28 Marking VS3V253Q VS3V253Q VS3V2253Q VS3V2253Q Shipping/Packaging Tubes Tape & Reel Tubes Tape & Reel Page 6 No. of Pins 16 16 16 16 Package QSOP QSOP QSOP QSOP Temperature -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C MDSS-0003-01 Vaishali Semiconductor 1300 White Oaks Road Campbell CA 95008 Ph. 408.377.6060 Fax 408.377.6063