Low Voltage 1.65 V to 3.6 V, Bidirectional Logic Level Translation, Bypass Switch ADG3233* FEATURES Operates from 1.65 V to 3.6 V Supply Rails Bidirectional Level Translation, Unidirectional Signal Path 8-Lead SOT-23 and MSOP Packages Bypass or Normal Operation Short Circuit Protection FUNCTIONAL BLOCK DIAGRAM VCC1 VCC2 VCC1 A1 APPLICATIONS JTAG Chain Bypassing Daisy-Chain Bypassing Digital Switching Y1 VCC1 VCC1 VCC2 VCC2 0 Y2 1 A2 EN GND GENERAL DESCRIPTION PRODUCT HIGHLIGHTS The ADG3233 is a bypass switch designed on a submicron process that operates from supplies as low as 1.65 V. The device is guaranteed for operation over the supply range 1.65 V to 3.6 V. It operates from two supply voltages, allowing bidirectional level translation, i.e., it translates low voltages to higher voltages and vice versa. The signal path is unidirectional, meaning data may only flow from A to Y. 1. Bidirectional level translation matches any voltage level from 1.65 V to 3.6 V. This type of device may be used in applications that require a bypassing function. It is ideally suited to bypassing devices in a JTAG chain or in a daisy-chain loop. One switch could be used for each device or a number of devices, thus allowing easy bypassing of one or more devices in a chain. This may be particularly useful in reducing the time overhead in testing devices in the JTAG chain or in daisy-chain applications where the user does not wish to change the settings of a particular device. 2. The bypass switch offers high performance and is fully guaranteed across the supply range. 3. Short circuit protection. 4. Tiny 8-lead SOT-23 package, 8.26 mm ⫻ 8.26 mm board area, or 8-lead MSOP. Table I. Truth Table EN Signal Path Function L H A1→Y2, Y1→VCC1 A1→Y1, A2→Y2 Enable Bypass Mode Enable Normal Mode The bypass switch is packaged in two of the smallest footprints available for its required pin count. The 8-lead SOT-23 package requires only 8.26 mm ⫻ 8.26 mm board space, while the MSOP package occupies approximately 15 mm ⫻ 15 mm board area. *Patent Pending REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective companies. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved. = V = 1.65 V to 3.6 V, GND = 0 V, All specifications T ADG3233–SPECIFICATIONS1 (Votherwise noted.) CC1 Parameter LOGIC INPUTS/OUTPUTS Input High Voltage4 Symbol 3 VIH Input Low Voltage4 VIL Output High Voltage (Y1) VOH Output Low Voltage (Y1) VOL LOGIC OUTPUTS3 Output High Voltage (Y2) VOH Output Low Voltage (Y2) VOL SWITCHING CHARACTERISTICS 4, 5 VCC = VCC1 = VCC2 = 3.3 V ± 0.3 V Propagation Delay, tPD A1 to Y1 Normal Mode A2 to Y2 Normal Mode A1 to Y2 Bypass Mode ENABLE Time EN to Y1 DISABLE Time EN to Y1 ENABLE Time EN to Y2 DISABLE Time EN to Y2 VCC = VCC1 = VCC2 = 2.5 V ± 0.2 V Propagation Delay, tPD A1 to Y1 Normal Mode A2 to Y2 Normal Mode A1 to Y2 Bypass Mode ENABLE Time EN to Y1 DISABLE Time EN to Y1 ENABLE Time EN to Y2 DISABLE Time EN to Y2 VCC = VCC1 = VCC2 = 1.8 V ± 0.15 V Propagation Delay, tPD A1 to Y1 Normal Mode A2 to Y2 Normal Mode A1 to Y2 Bypass Mode ENABLE Time EN to Y1 DISABLE Time EN to Y1 ENABLE Time EN to Y2 DISABLE Time EN to Y2 CC2 Conditions (VCC2 = 1.65 V to 3.6 V, GND = 0 V) VCC1 = 3.0 V to 3.6 V VCC1 = 2.3 V to 2.7 V VCC1 = 1.65 V to 1.95 V VCC1 = 3.0 V to 3.6 V VCC1 = 2.3 V to 2.7 V VCC1 = 1.65 V to 1.95 V IOH = –100 µA, VCC1 = 3.0 V to 3.6 V VCC1 = 2.3 V to 2.7 V VCC1 = 1.65 V to 1.95 V IOH = –4 mA, VCC1 = 2.3 V to 2.7 V VCC1 = 1.65 V to 1.95 V IOH = –8 mA, VCC1 = 3.0 V to 3.6 V IOL = +100 µA, VCC1 = 3.0 V to 3.6 V VCC1 = 2.3 V to 2.7 V VCC1 = 1.65 V to 1.95 V IOL = +4 mA, VCC1 = 2.3 V to 2.7 V VCC1 = 1.65 V to 1.95 V IOL = +8 mA, VCC1 = 3.0 V to 3.6 V (VCC1 = 1.65 V to 3.6 V, GND = 0 V) IOH = –100 µA, VCC2 = 3.0 V to 3.6 V VCC2 = 2.3 V to 2.7 V VCC2 = 1.65 V to 1.95 V IOH = –4 mA, VCC2 = 2.3 V to 2.7 V VCC2 = 1.65 V to 1.95 V IOH = –8 mA, VCC2 = 3.0 V to 3.6 V IOL = +100 µA, VCC2 = 3.0 V to 3.6 V VCC2 = 2.3 V to 2.7 V VCC2 = 1.65 V to 1.95 V IOL = +4 mA, VCC2 = 2.3 V to 2.7 V VCC2 = 1.65 V to 1.95 V IOL = +8 mA, VCC2 = 3.0 V to 3.6 V MIN Min Typ2 to TMAX, unless Max 1.35 1.35 0.65 VCC Unit 0.40 0.40 0.45 0.40 0.45 0.40 V V V V V V V V V V V V V V V V V V 0.40 0.40 0.45 0.40 0.45 0.40 V V V V V V V V V V V V 0.8 0.7 0.35 VCC 2.4 2.0 VCC – 0.45 2.0 VCC – 0.45 2.4 2.4 2.0 VCC – 0.45 2.0 VCC – 0.45 2.4 tPHL, tPLH tPHL, tPLH tPHL, tPLH tEN tDIS tEN tDIS CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 3.5 3.5 4 4 2.8 4.5 4 5.4 5.4 6.5 6 4 6.5 6.5 ns ns ns ns ns ns ns tPHL, tPLH tPHL, tPLH tPHL, tPLH tEN tDIS tEN tDIS CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 4.5 4.5 4.5 5 3.2 5 4.8 6.2 6.2 6.5 7.2 4.7 7.7 7.2 ns ns ns ns ns ns ns tPHL, tPLH tPHL, tPLH tPHL, tPLH tEN tDIS tEN tDIS CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 CL = 30 pF, VT = VCC/2 6.7 6.5 6.5 7 4.4 7 6.5 10 10 10.25 10.5 6.5 12 10.5 ns ns ns ns ns ns ns –2– REV. 0 ADG3233 Parameter SWITCHING CHARACTERISTICS Input Leakage Current Output Leakage Current Symbol 4, 5 POWER REQUIREMENTS Power Supply Voltages Quiescent Power Supply Current Increase in ICC per Input (continued) II IO VCC1 VCC2 ICC1 ICC2 ∆ ICC1 Conditions Min 0 ⱕ VIN ⱕ 3.6 V 0 ⱕ VIN ⱕ 3.6 V 1.65 1.65 Digital Inputs = 0 V or V CC Digital Inputs = 0 V or V CC VCC = 3.6 V, One Input at 3.0 V; Others at VCC or GND Typ2 Max Unit ±1 ±1 µA µA 3.6 3.6 2 2 V V µA µA 0.75 µA NOTES 1 Temperature range is as follows: B Version: –40°C to +85°C. 2 All typical values are at V CC = VCC1 = VCC2, TA = 25°C, unless otherwise stated. 3 VIL and VIH levels are specified with respect to V CC1, VOH and VOL levels for Y1 are specified with respect to VCC1, and VOH and VOL levels are specified for Y2 with respect to VCC2. 4 Guaranteed by design, not subject to production test. 5 See Test Circuits and Waveforms. Specifications subject to change without notice. REV. 0 –3– ADG3233 ABSOLUTE MAXIMUM RATINGS* Lead Temperature, Soldering (10 sec) . . . . . . . . . . . . . 300°C IR Reflow, Peak Temperature (<20 sec) . . . . . . . . . . . . 235°C (TA = 25°C, unless otherwise noted.) VCC to GND . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +4.6 V Digital Inputs to GND . . . . . . . . . . . . . . . . . . –0.3 V to +4.6 V A1, EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +4.6 V A2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to VCC1 + 0.3V DC Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 mA Operating Temperature Range Industrial (B Version) . . . . . . . . . . . . . . . . . –40°C to +85°C Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C 8-Lead MSOP JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 206°C/W JC Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . 43°C/W 8-Lead SOT-23 JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . 211°C/W * Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Only one absolute maximum rating may be applied at any one time. ORDERING GUIDE Model Temperature Range Package Description Branding Package Option ADG3233BRJ-REEL ADG3233BRJ-REEL7 ADG3233BRM ADG3233BRM-REEL ADG3233BRM-REEL7 –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C –40°C to +85°C SOT-23 SOT-23 MSOP MSOP MSOP W1B W1B W1B W1B W1B RJ-8 RJ-8 RM-8 RM-8 RM-8 PIN CONFIGURATIONS 8-Lead MSOP Package (RM-8) 8-Lead SOT-23 Package (RJ-8) VCC1 1 A1 2 ADG3233 8 VCC2 7 Y1 VCC2 1 Y1 2 6 Y2 TOP VIEW EN 4 (Not to Scale) 5 GND ADG3233 8 VCC1 7 A1 6 A2 TOP VIEW GND 4 (Not to Scale) 5 EN A2 3 Y2 3 PIN FUNCTION DESCRIPTIONS Pin RJ-8 RM-8 Mnemonic Description 1 8 2 3 7 6 8 1 7 6 2 3 VCC1 VCC2 A1 A2 Y1 Y2 4 5 5 4 EN GND Supply Voltage 1, can be any supply voltage from 1.65 V to 3.6 V. Supply Voltage 2, can be any supply voltage from 1.65 V to 3.6 V. Input Referred to VCC1. Input Referred to VCC2. Output Referred to VCC1. Output Referred to VCC2. Voltage levels appearing at Y2 will be translated from VCC1 voltage level to a VCC2 voltage level. Active Low Device Enable. When low, bypass mode is enabled; when high, the device is in normal mode. Device Ground. CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADG3233 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. –4– REV. 0 Typical Performance Characteristics–ADG3233 5.0 30 TA = 25ⴗC 4.5 4.0 3.5 3.5 3.0 2.5 2.0 VCC2 = 3.3V TA = 25ⴗC 25 ICC1 – nA 4.0 ICC2 – nA ICC1 – nA 5.0 TA = 25ⴗC 4.5 3.0 2.5 VCC1 = 3.3V 20 VCC1 = 2.5V 15 VCC1 = 1.8V 2.0 1.5 VCC2 = 2.5V 1.0 1.5 VCC2 = 3.3V 0 1.5 VCC1 = 3.3V 1.0 VCC2 = 1.8V 0.5 10 VCC1 = 2.5V 5 0.5 VCC1 = 1.8V 0 2.0 2.5 3.0 VCC1 – V 3.5 4.0 1.5 TPC 1. ICC1 vs. VCC1 2.0 2.5 3.0 VCC2 – V 3.5 0 0 4.0 TPC 2. ICC2 vs. VCC2 30 25 1800 20 30 40 50 60 70 TEMPERATURE – ⬚C 80 TA = 25ⴗC TA = 25ⴗC 70 VCC1 = V CC2 = 3.3V 1600 60 1400 15 VCC2 = 2.5V 10 VCC2 = 1.8V VCC1 = V CC2 = 3.3V 1000 800 400 0 20 VCC1 = V CC2 = 1.8V VCC1 = V CC2 = 1.8V 10 200 0 10k –5 0 10 20 30 40 50 60 70 TEMPERATURE – ⬚C 80 TPC 4. ICC2 vs. Temperature 100k 1M 10M FREQUENCY – Hz 0 10k 100M TPC 5. ICC1 vs. Frequency, Normal Mode 2000 1800 1600 1600 1400 1400 1000 800 600 400 VCC1 = V CC2 = 1.8V 800 6 100k 1M 10M FREQUENCY – Hz 100M 0 10k tEN tDIS 4 VCC1 = V CC2 = 1.8V 2 TA = 25ⴗC VCC1 = VCC2 200 TPC 7. ICC2 vs. Frequency, Normal Mode REV. 0 1000 400 200 0 10k 1200 600 100M 8 TIME – ns VCC1 = V CC2 = 3.3V 10M 1M FREQUENCY – Hz 10 TA = 25ⴗC VCC1 = V CC2 = 3.3V ICC2 –A 1200 100k TPC 6. ICC1 vs. Frequency, Bypass Mode 2000 TA = 25ⴗC 40 30 600 5 ICC2 –A 50 1200 ICC1 –A VCC2 = 3.3V ICC1 –A ICC2 – nA 20 1800 80 TPC 3. ICC1 vs. Temperature 2000 VCC1 = 3.3V TA = 25ⴗC 10 100k 1M 10M FREQUENCY – Hz TPC 8. ICC2 vs. Frequency, Bypass Mode –5– 100M 0 1.5 2.0 2.5 3.0 SUPPLY – V 3.5 4.0 TPC 9. Y1 Enable, Disable Time vs. Supply ADG3233 8 6 6 5 5 tEN 4 TIME – ns tEN 3 tDIS tDIS 2 2 1 TA = 25ⴗC VCC1 = VCC2 0 1.5 2.0 2.5 3.0 SUPPLY – V 3.5 16 VCC1 = 3.3V VCC2 = 1.8V TA = 25ⴗC DATA RATE 10Mbps 0 20 40 60 TEMPERATURE – ⴗC 12 tPLH, LOW-TO-HIGH TRANSITION 6 4 tPHL, HIGH-TO-LOW TRANSITION 2 4 22 32 42 52 62 72 82 CAPACITIVE LOAD – pF 92 32 42 52 62 72 82 92 7 VCC1 = 1.8V VCC2 = 3.3V TA = 25ⴗC 8 DATA RATE 10Mbps t , LOW-TO-HIGH TRANSITION 7 LH 6 5 4 3 tHL, HIGH-TO-LOW TRANSITION PROPAGATION DELAY – ns 8 9 tPHL, HIGH-TO-LOW TRANSITION 22 32 6 92 102 tPLH, LOW-TO-HIGH TRANSITION 5 4 tPHL, HIGH-TO-LOW TRANSITION 3 2 TPC 16. Rise/Fall Time vs. Capacitive Load, A1–Y2, Bypass Mode 6 42 52 62 72 82 CAPACITIVE LOAD – pF 92 102 TPC 17. Propagation Delay vs. Capacitive Load A1 to Y1 –6– 102 tPLH, LOW-TO-HIGH TRANSITION 5 4 tPHL, HIGH-TO-LOW TRANSITION 3 2 0 32 92 TPC 15. Rise/Fall Time vs. Capacitive Load, A1–Y1, A2–Y2 1 22 42 52 62 72 82 CAPACITIVE LOAD – pF 7 0 0 42 52 62 72 82 CAPACITIVE LOAD – pF 3 8 VCC1 = 3.3V VCC2 = 3.3V TA = 25ⴗC DATA RATE 10Mbps 1 1 32 4 0 102 TPC 14. Rise/Fall Time vs. Capacitive Load, A1–Y2, Bypass Mode 10 22 5 CAPACITIVE LOAD – pF TPC 13. Rise/Fall Time vs. Capacitive Load, A1–Y1, A2–Y2 2 6 1 22 102 VCC1 = 1.8V VCC2 = 3.3V TA = 25ⴗC 8 DATA RATE 10Mbps tPLH, LOW-TO-HIGH TRANSITION 7 2 tPHL, HIGH-TO-LOW TRANSITION 0 0 80 9 6 2 0 20 40 60 TEMPERATURE – ⴗC 10 tPLH, LOW-TO-HIGH TRANSITION 8 –20 TPC 12. Y2 Enable, Disable Time vs. Temperature 10 8 0 –40 80 VCC1 = 3.3V VCC2 = 1.8V TA = 25ⴗC DATA RATE 10Mbps 14 10 RISE/FALL TIME – ns –20 VCC1 = VCC2 = 3.3V TPC 11. Y1 Enable, Disable Time vs. Temperature RISE/FALL TIME – ns RISE/FALL TIME – ns 0 –40 4.0 16 12 1 VCC1 = VCC2 = 3.3V TPC 10. Y2 Enable, Disable Time vs. Supply 14 tDIS 3 2 RISE/FALL TIME – ns 4 tEN 4 PROPAGATION DELAY – ns TIME – ns 6 TIME – ns 10 VCC1 = 3.3V VCC2 = 3.3V TA = 25ⴗC DATA RATE 10Mbps 22 32 42 52 62 72 82 CAPACITIVE LOAD – pF 92 102 TPC 18. Propagation Delay vs. Capacitive Load A2 to Y2 REV. 0 ADG3233 8 6 5 4 tPHL, HIGH-TO-LOW TRANSITION 3 2 VCC1 = 3.3V VCC2 = 3.3V TA = 25ⴗC DATA RATE 10Mbps 1 0 22 32 42 52 62 72 82 CAPACITIVE LOAD – pF 92 tPHL, A2–Y2 4.0 3.0 tPHL, A1–Y1 2.0 1.5 2.0 2.5 3.0 SUPPLY – V tPHL, A1–Y2 4.0 tPLH , A1–Y2 2.0 TA = 25ⴗC VCC1 = VCC2 3.5 0 1.5 4.0 TPC 20. Propagation Delay vs. Supply, Normal Mode tPHL, A1–Y1 2.0 2.5 3.0 SUPPLY – V 3.5 4.0 TPC 21. Propagation Delay vs. Supply, Bypass Mode TA = 25ⴗC EN = HIGH PROPAGATION DELAY – ns tPHL, A1–Y2 2.5 tPLH, A1–Y1 2.0 tPLH, A2–Y2 1.5 1.0 tPLH, A1–Y2 3 1 2.0 A2 TPC 22. Propagation Delay vs. Temperature, Normal Mode TA = 25ⴗC DATA RATE = 10MHz –20 0 20 40 60 TEMPERATURE – ⴗC A1 DATA RATE = 10MHz 80 TPC 24. Normal Mode VCC1 = 3.3 V, VCC2 = 1.8 V 3.3V A1 3 1.8V A1 Y2 1.8V 3.3V 2 4 TPC 23. Propagation Delay vs. Temperature, Bypass Mode 3.3V Y2 1.0 0 –40 80 3.3V 1.8V TA = 25ⴗC VCC1 = VCC2 = 3.3V 0 20 40 60 TEMPERATURE – ⴗC Y1 A1 3.0 TA = 25ⴗC VCC1 = VCC2 = 3.3V –20 tPLH, A2–Y2 TA = 25ⴗC VCC1 = VCC2 0 102 3.0 0 –40 5.0 6.0 4.0 tPHL, A2–Y2 3.5 0.5 tPLH, A1–Y1 1.0 TPC 19. Propagation Delay vs. Capacitive Load A1 to Y2, Bypass Mode 4.0 6.0 PROPAGATION DELAY – ns 7.0 tPLH, LOW-TO-HIGH TRANSITION PROPAGATION DELAY – ns PROPAGATION DELAY – ns 7 PROPAGATION DELAY – ns 8.0 8.0 Y1 1 1.8V Y2 3.3V 3 2 3.3V 2 1.8V A2 3 4 Y2 TA = 25ⴗC DATA RATE = 10MHz 2 TPC 25. Bypass Mode, VCC1 = 3.3 V, VCC2 = 1.8 V REV. 0 TPC 26. Normal Mode VCC1 = 1.8 V, VCC2 = 3.3 V –7– Y1 1.8V 1 TA = 25ⴗC DATA RATE = 10MHz TPC 27. Bypass Mode, VCC1 = 1.8 V, VCC2 = 3.3 V ADG3233 3.5 TA = 25ⴗC VCC = VCC1 = VCC2 3 VCC = 3.3V VOLTAGE – V 2.5 SOURCE VCC = 2.5V 2 1.5 VCC = 1.8V VCC = 3.3V 1 VCC = 1.8V VCC = 2.5V 0.5 SINK 0 0 5 10 15 20 CURRENT – mA TPC 28. Y1 and Y2 Source and Sink Current VCC1 INPUT VCC1 VT tPHL tPLH OUTPUT VT EN 0V 0V tEN VOH tDIS VCC1 VT A1 VOL 0V Figure 1. Propagation Delay VCC1 A2 0V Y2 VCC1 0V tEN Y1 (A1 @ GND) VOH VT VOL VT EN VT Figure 3. Y2 Enable and Disable Times tDIS VOH VT VT VOL Figure 2. Y1 Enable and Disable Times –8– REV. 0 ADG3233 rail, there are no internal diodes to the supply rails, so the device can handle inputs above the supply but inside the absolute maximum ratings. DESCRIPTION The ADG3233 is a bypass switch designed on a submicron process that operates from supplies as low as 1.65 V. The device is guaranteed for operation over the supply range 1.65 V to 3.6 V. It operates from two supply voltages, allowing bidirectional level translation, i.e., it translates low voltages to higher voltages and vice versa. The signal path is unidirectional, meaning data may only flow from A to Y. Normal Operation Figure 4 shows the bypass switch being used in normal mode. In this mode, the signal paths are from A1 to Y1 and A2 to Y2. The device will level translate the signal applied to A1 to a VCC1 logic level (this level translation can be either to a higher or lower supply) and route the signal to the Y1 output, which will have standard VOL/VOH levels for VCC1 supplies. The signal is then passed through Device 1 and back to the A2 input pin of the bypass switch. A1 and EN Input The A1 and enable (EN) inputs have VIL/VIH logic levels so that the part can accept logic levels of VOL/VOH from Device 0 or the controlling device independent of the value of the supply being used by the controlling device. These inputs (A1, EN) are capable of accepting inputs outside the VCC1 supply range. For example, the VCC1 supply applied to the bypass switch could be 1.8 V while Device 0 could be operating from a 2.5 V or 3.3 V supply VCC1 VCC2 DEVICE 1 DEVICE 2 VCC0 DEVICE 0 The logic level inputs of A2 are with respect to the VCC1 supply. The signal will be level translated from VCC1 to VCC2 and routed to the Y2 output pin of the bypass switch. Y2 output logic levels are with respect to the VCC2 supply. SIGNAL INPUT SIGNAL OUTPUT VCC1 VCC2 A1 Y1 A2 Y2 LOGIC 1 EN BYPASS SWITCH Figure 4. Bypass Switch in Normal Mode REV. 0 –9– ADG3233 VCC1 VCC2 DEVICE 1 DEVICE 2 VCC0 DEVICE 0 SIGNAL OUTPUT SIGNAL INPUT VCC1 VCC2 A1 Y1 A2 Y2 LOGIC 0 EN BYPASS SWITCH Figure 5. Bypass Switch in Bypass Mode Bypass Operation Figure 5 illustrates the device as used in bypass operation. The signal path is now from A1 directly to Y2, thus bypassing Device 1 completely. The signal will be level translated to a VCC2 logic level and available on Y2, where it may be applied directly to the input of Device 2. In bypass mode, Y1 is pulled up to VCC1. The three supplies in Figures 4 and 5 may be any combination of supplies, i.e., VCC0, VCC1, and VCC2 may be any combination of supplies, for example, 1.8 V, 2.5 V, and 3.3 V. –10– REV. 0 ADG3233 OUTLINE DIMENSIONS 8-Lead Mini Small Outline Package [MSOP] (RM-8) Dimensions shown in millimeters 3.00 BSC 8 5 4.90 BSC 3.00 BSC 1 4 PIN 1 0.65 BSC 1.10 MAX 0.15 0.00 0.38 0.22 COPLANARITY 0.10 0.80 0.40 8ⴗ 0ⴗ 0.23 0.08 SEATING PLANE COMPLIANT TO JEDEC STANDARDS MO-187AA 8-Lead Small Outline Transistor Package [SOT-23] (RJ-8) Dimensions shown in millimeters 2.90 BSC 8 7 6 5 1 2 3 4 1.60 BSC 2.80 BSC PIN 1 0.65 BSC 1.30 1.15 0.90 1.95 BSC 1.45 MAX 0.15 MAX 0.38 0.22 SEATING PLANE 0.22 0.08 8ⴗ 4ⴗ 0ⴗ COMPLIANT TO JEDEC STANDARDS MO-178BA REV. 0 –11– 0.60 0.45 0.30 –12– C03297–0–5/03(0)