RS2251XS16

RS2251 CMOS Single 8-Channel Analog Multiplexer/Demultiplexer FEATURES • -3dB Bandwidth: 180MHz • Single Supply Operation +2.5V to +5.5V • Low ON Resistance, 48Ω(TYP) With 5V Supply High Off-Isolation: -83dB (RL = 50Ω, f = 1MHz) • • • Break-Before-Make Switching Binary Address Decoding on Chip • Operating Temperature Range: -40°C to +125°C • PACKAGES: SOIC-16(SOP16), SSOP-16, TSSOP-16 and QFN-3×3-16L DESCRIPTION The RS2251 is a CMOS analog IC configured as an 8-channel multiplexer. This CMOS device can operate from 2.5 V to 5.5 V. The RS2251 device are digitally-controlled analog switches. It has low on-resistance (48Ω TYP) and very low off-leakage current (1nA TYP). The RS2251 is available in Green SOIC-16, SSOP16, TSSOP-16 and QFN-3×3-16L packages. It operates over an ambient temperature range of -40°C to +125°C. Functional Diagrams of RS2251 APPLICATIONS • Sensors • • Analog and Digital Multiplexing and Demultiplexing A/D and D/A Conversion • Signal Gating • Battery-Operated Equipment • • • EN AB LE C B A C BA 00 0 00 1 X0 X1 01 0 X2 01 1 X3 Factory Automation Appliances 10 0 X4 Communications Circuits 11 0 11 1 X 10 1 R S2 25 1 RevC.1 1 X5 X6 X7 www.run-ic.com RS2251 PIN CONFIGURATIONS (TOP VIEW) (TOP VIEW) X4 1 16 VCC X6 2 15 X2 X 3 14 X1 X7 4 13 X0 X5 5 12 X3 ENABLE 6 11 A NC 7 10 B GND 8 9 X X6 X4 16 15 VCC 14 X2 13 X 1 12 X1 11 X0 10 X3 9 A X7 X7 2 X5 3 ENABLE 4 RS2251 EP C SOIC-16(SOP16)/SSOP-16/ TSSOP-16 5 6 7 8 NC GND C B QFN-3×3-16L PIN DESCRIPTION X0-X7 X PIN (SOIC-16/SSOP-16/TSSOP-16) 13,14,15,12,1,5,2,4 3 PIN (QFN-3×3-16L) 11,12,13,10,15,3,16,2 1 VCC 16 14 A B C GND NC 11 10 9 8 7 9 8 7 6 5 ENABLE 6 4 EP — Exposed Pad NAME FUNCTION Analog Switch Inputs X0-X7. Analog Switch “X” Output. Positive Analog and Digital Supply Voltage Input Digital Address “A” Input. Digital Address “B” Input. Digital Address “C” Input. Ground. Connect to digital ground. No Connect. Digital Enable Input. Normally connected to GND. Exposed Pad. Connect EP to GND. FUNCTION TABLE ENABLE INPUT 1 0 0 0 0 0 0 0 0 INPUT STATES C X 0 0 0 0 1 1 1 1 B X 0 0 1 1 0 0 1 1 A X 0 1 0 1 0 1 0 1 ON CHANNEL(S) NONE X0 X1 X2 X3 X4 X5 X6 X7 X=Don’t care NOTE: Input and output pins are identical and interchangeable. Either may be considered an input or output; signals pass equally well in either direction. 2 www.run-ic.com RS2251 ABSOLUTE MAXIMUM RATINGS (1) VCC to GND..........................................................−0.3 to 6V Input Terminals, Voltage. (2) .................– 0.3 to (V+) + 0.3V Continuous Current into Any Terminal......................±20mA Peak Current, X_ (Pulsed at 1ms,10% duty cycle)…………………….. ±40mA Storage Temperature ……….…………… −65°C to +150°C Operating Temperature ……….…….…… −40°C to +125°C Junction Temperature...............................................+150°C Package Thermal Resistance @ TA = +25°C ESD SENSITIVITY CAUTION ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. QFN-3×3-16L………………….…………..…………. 80°C/W SSOP-16……….…………........................................64°C/W SOIC-16, TSSOP-16………….……….…………….100°C/W Lead Temperature (Soldering, 10s) …………….........260°C ESD Susceptibility HBM ….......................................................................1000V MM ……………………….........………………...……….100V (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied. (2) Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.3V beyond the supply rails should be current-limited to 10mA or less. PACKAGE/ORDERING INFORMATION PRODUCT RS2251 ORDERING NUMBER TEMPERATURE RANGE PACKAGE LEAD PACKAGE MARKING PACKAGE OPTION SOIC-16(SOP16) RS2251 Tape and Reel,3000 SSOP-16 RS2251 Tape and Reel,3000 RS2251XS16 -40°C ~+125°C RS2251XSS16 -40°C ~+125°C RS2251XTSS16 -40°C ~+125°C TSSOP-16 RS2251 Tape and Reel,3000 RS2251XTQC16 -40°C ~+125°C QFN-3×3 -16L RS2251 Tape and Reel,3000 3 www.run-ic.com RS2251 ELECTRICAL CHARACTERISTICS VCC = 5.0 V or 3.3V, FULL= –40°C to +125°C, Typical values are at TA = +25°C. (unless otherwise noted) PARAMETER SYMBOL CONDITIONS VCC TA MIN TYP MAX UNITS ANALOG SWITCH Analog Signal Range VX_，VX FULL 5V On-Resistance RON 3.3V On-Resistance Match Between Channels On-Resistance Flatness X_ Off, X Off, X On Leakage Current ∆RON 5V RFLAT(ON) 5V Ix_(OFF) Ix(OFF) Ix(ON) GND +25°C 48 FULL +25°C 100 FULL +25°C 1.5 FULL +25°C 17 FULL VCC V 58 Ω 67 Ω 130 Ω 140 Ω 5 Ω 5.3 Ω 25 Ω 28 Ω 5V +25°C 1 1000 nA 3.3V +25°C 1 1000 nA 5V +25°C 1.7 V 3.3V +25°C 1.7 V 5V +25°C 0.5 V 3.3V +25°C 0.5 V DIGITAL CONTROL INPUTS(1) Logic Input Logic Threshold High VAH, VBH, VCH, V̅̅̅̅̅̅̅̅̅̅̅̅ ENABLE Logic Input Logic Threshold Low VAL, VBL, VCL V̅̅̅̅̅̅̅̅̅̅̅̅ ENABLE Input-Current High IAH, IBH, ICH I̅̅̅̅̅̅̅̅̅̅̅̅ ENABLE VENABLE ̅̅̅̅̅̅̅̅̅̅̅̅ 3.3V to 5V +25°C 1 1000 nA Input-Current Low IAL, IBL, ICL I̅̅̅̅̅̅̅̅̅̅̅̅ ENABLE VENABLE ̅̅̅̅̅̅̅̅̅̅̅̅ 3.3V to 5V +25°C 1 1000 nA (1) All unused digital inputs of the device must be held at VIO or GND to ensure proper device operation. 4 www.run-ic.com RS2251 ELECTRICAL CHARACTERISTICS (continued) VCC= 5.0 V or 3.3V, FULL= –40°C to +125°C Typical values are at TA = +25°C (unless otherwise noted) PARAMETER SYMBOL CONDITIONS VCC TEMP MIN TYP MAX UNITS 5V +25°C 150 ns 3.3V +25°C 230 ns DYNAMIC CHARACTERISTICS Address Transition Time tTRANS ENABLE Turn-On Time tON ENABLE Turn-Off Time tOFF Internal A, B, C Rise Time tR Internal A, B, C Fall Time tF Break-Before-Make Time Delay tD Charge Injection Q Off Isolation OISO -3dB Bandwidth BW 5V 3.3V 5V 3.3V 5V 3.3V 65 110 80 130 +25°C +25°C ns ns 50 +25°C ns 80 5V 3.3V +25°C +25°C 60 85 ns ns 5V +25°C 60 ns 3.3V +25°C 90 ns 5V +25°C 6 pC 3.3V +25°C 4 pC 5V +25°C -83 dB 5V +25°C 180 MHz 3.3V +25°C 180 MHz Input Off-Capacitance CX_(OFF) 5V +25°C 4.7 pF Output Off-Capacitance CX(OFF) 5V +25°C 12.7 pF Output On- Capacitance CX(ON) 5V +25°C 16 pF Total Harmonic Distortion THD 5V +25°C 0.7 % Ω POWER REQUIREMENTS Power Supply Range VCC Power Supply Current ICC FULL 2.5 5.5 V VENABLE ̅̅̅̅̅̅̅̅̅̅̅̅ 5V +25°C 0.001 6 μA V̅̅̅̅̅̅̅̅̅̅̅̅ ENABLE 3.3V +25°C 0.001 3 μA 5 www.run-ic.com RS2251 TYPICAL CHARACTERISTICS Typical ron as a Function of Input Voltage (VI ) for VI = 0 to V+ 400 Ron(Ω) 200 100 50 25 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 VI(V) V+=5.5V V+=4.5V V+=3.3V 6 V+=2.5V www.run-ic.com RS2251 Parameter Measurement Information Test Circuit 1. Address Transition Times (tTRANS) Test Circuit 2. Switching Times (tON, tOFF) Test Circuit 3. Break-Before-Make Time Delay (tD) 7 www.run-ic.com RS2251 Parameter Measurement Information (continued) Test Circuit 4. Charge Injection (Q) Test Circuit 5. Off Isolation, On Loss Test Circuit 6. Capacitance 8 www.run-ic.com RS2251 APPLICATION NOTES The RS2251 device is a single 8-channel multiplexer having three binary control inputs, A, B, and C, and an inhibit input. The three binary signals select 1 of 8 channels to be turned on and connect one of the 8 inputs to the output. One application of the RS2251 is to use it in conjunction with a microcontroller to poll a keypad. Figure 1 shows the basic schematic for such a polling system. The microcontroller uses the channel select pins to cycle through the different channels while reading the input to see if a user is pressing any of the keys. This is a very robust setup, allowing for multiple simultaneous key-presses with very little power consumption. It also utilizes very few pins on the microcontroller. The down side of polling is that the microcontroller must continually scan the keys for a press and can do little else during this process. Microcontroller Input Channel Select ENABLE C B A CBA 00 0 00 1 X 3.3 V GND X2 01 1 X3 10 0 X4 X5 11 0 11 1 NC X1 01 0 10 1 VCC X0 X6 X7 RS2251 3.3 V k0 k1 k2 k3 k4 k5 k6 k7 Pull-down resistors (10KΩ) Figure 1. The RS2251 Being Used to Help Read Button Presses on a Keypad. 9 www.run-ic.com RS2251 PACKAGE OUTLINE DIMENSIONS SOIC-16 e b 5.2 1.27 E1 E 0.6 D 1.27 RECOMMENDED LAND PATTERN (Unit: mm) A2 A1 A c θ L Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 9.800 10.200 0.386 0.402 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 e 1.27(BSC) 0.050(BSC) L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° 10 www.run-ic.com RS2251 SSOP-16 e b 5.588 E1 E 1.651 D 0.635 0.406 RECOMMENDED LAND PATTERN (Unit: mm) A2 A1 Symbol H C A θ L Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.200 0.300 0.008 0.012 c 0.170 0.250 0.007 0.010 D 4.700 5.100 0.185 0.200 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 e 0.635(BSC) 0.025(BSC) L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° 11 www.run-ic.com RS2251 TSSOP-16 e b 5.94 E1 E 1.78 D 0.65 0.42 RECOMMENDED LAND PATTERN (Unit: mm) A2 A1 Symbol H C A θ L Dimensions In Millimeters Min Max A Dimensions In Inches Min Max 1.200 0.047 A1 0.050 0.150 0.002 0.006 A2 0.800 1.050 0.031 0.041 b 0.190 0.300 0.007 0.012 c 0.090 0.200 0.004 0.008 D 4.860 5.100 0.191 0.201 E 4.300 4.500 0.169 0.177 E1 6.200 6.600 0.244 0.260 e L 0.650(BSC) 0.500 H θ 0.026(BSC) 0.700 0.02 0.25TYP 1° 0.028 0.01TYP 7° 12 1° 7° www.run-ic.com RS2251 QFN-3x3-16L E e L b E1 D D1 N16 N5 N1 TOP VIEW BOTTOM VIEW 0.50 1.70 A1 A2 3.60 A 0.70 0.24 SIDE VIEW 1.70 RECOMMENDED LAND PATTERN (Unit: mm) Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.700 0.800 0.028 0.031 A1 0.000 0.050 0.000 0.002 A2 0.203 0.008 b 0.180 0.300 0.007 0.012 D 2.900 3.100 0.114 0.122 D1 1.600 1.800 0.063 0.071 E 2.900 3.100 0.114 0.122 E1 1.600 1.800 0.063 0.071 e L 0.500 TYP 0.300 0.020 TYP 0.500 13 0.012 0.020 www.run-ic.com