TOP VIEW V L GND I/O V L GND

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1 ; Rev 3; 5/9 1µA, 2Mbps, Low-Voltage Level Tralators in SC7 and µdfn General Description The MAX337/ logic-level tralators are ideal for applicatio interfacing low-voltage devices to other logic levels. Externally applied voltages set the logic levels of the MAX337/. The devices accept from +2.5V to +5.5V and from +1.6V to +5.5V, allowing data trafer between low-voltage ASICs and higher voltage devices. The features a shutdown mode that reduces supply current to < 1µA and puts the I/O pi in a high-impedance state. The MAX337/ are bidirectional level shifters, allowing data trafer from the side to the side and from the side to the side. Both devices operate at speeds up to 2Mbps with an active driver and up to 5kbps with an r. The MAX337/ are available in space-saving µdfn (1mm x 1.5mm) and SC7 packages. Applicatio Cell Phone Cradles Cell Phone Hands-Free Kits Portable POS Systems Portable Communication Devices Smart Card Readers SPI, MICROWIRE, and I 2 C Level Tralation Low-Voltage ASIC Level Tralation RS-232-Compatible Tralation SPI is a trademark of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp. Features Allow Bidirectional Level Tralation Miniature µdfn (1mm x 1.5mm) and SC7 Packages Operational Down to 1.6V Low Quiescent Current (< 1µA) Ultra-Low (< 1µA) Shutdown Supply Current () Three-State Outputs in Shutdown () 2Mbps (1pF Load) Push-Pull Driving 1Mbps (5pF Load) Push-Pull Driving 5kbps (3pF Load) Open-Drain Driving TOP VIEW Ordering Information PART* PIN-PACKAGE SHDN TOP MARK MAX337EXK+T 5 SC7 NO ABV MAX337ELT+T 6 μdfn NO KX ELT+T 6 μdfn YES KY EXT+T 6 SC7 YES AAO *All devices are specified over the -4 C to +85 C operating temperature range. +Denotes lead(pb)-free/rohs-compliant package. Pin Configuratio MAX337/ Typical Operating Circuit 2 MAX337 2 MAX337 5 N.C. +1.8V +3.3V V SYSTEM CONTROLLER SHDN * MAX337 DATA 3.3V SYSTEM DATA 5 SC SHDN 6 μdfn (1mm x 1.5mm) SHDN * ONLY M. 6 SC7 6 μdfn (1mm x 1.5mm) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 Tralators in SC7 and µdfn MAX337/ ABSOLUTE MAXIMUM RATINGS to...-.3v to +7V SHDN to...-.3v to ( +.3V) to...-.3v to ( +.3V), to...-.3v to ( +.3V) Short-Circuit Duration:, to...continuous Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditio beyond those indicated in the operational sectio of the specificatio is not implied. Exposure to absolute maximum rating conditio for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Continuous Power Dissipation (T A = +7 C) SC7 (derate 3.1mW/ C above +7 C)...245mW 6-Pin µdfn (derate 2.1mW/ C above +7 C)...168mW Operating Temperature Range...-4 C to +85 C Storage Temperature Range C to +15 C Lead Temperature (soldering, 1s)...+3 C ( = +2.5V to +5.5V, = +1.6V to +5.5V (Note 1), = ;, unconnected; T A = -4 C to +85 C, unless otherwise noted. Typical values are at T A = +25 C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLIES Supply Range (Note 1) V Supply Range V Supply Current from I QVCC 7 1 μa Supply Current from I QVL 5 1 μa Shutdown Supply Current SHDN =, T A = +25 C,.3 1 μa Shutdown Supply Current SHDN =, T A = +25 C,.3 1 μa Three-State Output Leakage Current LOGIC LEVEL THRESHOLDS Input-Voltage High Threshold Input-Voltage Low Threshold Input-Voltage High Threshold Input-Voltage Low Threshold, ; SHDN =, T A = +25 C,.2 1 μa V IHL -.2 V V ILL.15 V V IHC -.4 V Output-Voltage High V OHL sink current = 2μA, -.4V (Note 3) Output-Voltage Low Output-Voltage High Output-Voltage Low SHDN Input-Voltage High SHDN Input-Voltage Low V ILC.2 V V OLL V OHC V OLC V IH-SHDN V IL-SHDN sink current = 1mA,.2V (Note 3) source current = 2μA, -.2V (Note 3) sink current = 1mA,.15V (Note 3) 2/3 2/3 2/3 +1.8V V.2 V.4 V V.4 V V V 2

3 Tralators in SC7 and µdfn ELECTRICAL CHARACTERISTICS (continued) ( = +2.5V to +5.5V, = +1.6V to +5.5V (Note 1), = ;, unconnected; T A = -4 C to +85 C, unless otherwise noted. Typical values are at T A = +25 C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS TIMING CHARACTERISTICS (R LOAD = 1M, = +2.5V, = +1.6V, I/O test signal rail-to-rail, unless otherwise noted, Figure 1) (Note 3) Rise Time (Note 4) Fall Time (Note 4) Rise Time (Note 4) Fall Time (Note 4) HIGH-to-LOW Traition (Driving ) LOW-to-HIGH Traition (Driving ) HIGH-to-LOW Traition (Driving ) LOW-to-HIGH Traition (Driving ) t RVCC t FVCC t RVL t FVL C LOAD = 1pF, data rate = 2Mbps (Note 5) 1 C LOAD = 5pF, data rate = 1Mbps 2 C LOAD = 3pF, data rate = 5kbps, C LOAD = 1pF, data rate = 2Mbps (Note 5) 5 4 C LOAD = 5pF, data rate = 1Mbps 2 C LOAD = 3pF, data rate = 5kbps, 4 C LOAD = 1pF, data rate = 2Mbps (Note 5) 1 C LOAD = 5pF, data rate = 1Mbps 2 C LOAD = 3pF, data rate = 5kbps, C LOAD = 1pF, data rate = 2Mbps (Note 5) 5 4 C LOAD = 5pF, data rate = 1Mbps 2 C LOAD = 3pF, data rate = 5kbps, C LOAD = 1pF, data rate = 2Mbps (Note 5) 5 t PD-VCC-HL C LOAD = 5pF, data rate = 1Mbps 2 CLOAD = 3pF, data rate = 5kbps, 4 C LOAD = 1pF, data rate = 2Mbps (Note 5) 2 t PD-VCC-LH C LOAD = 5pF, data rate = 1Mbps 4 CLOAD = 3pF, data rate = 5kbps, 8 C LOAD = 1pF, data rate = 2Mbps (Note 5) 5 t PD-VL-HL C LOAD = 5pF, data rate = 1Mbps 2 C LOAD = 3pF, data rate = 5kbps, 4 C LOAD = 1pF, data rate = 2Mbps (Note 5) 2 t PD-VL-LH C LOAD = 5pF, data rate = 1Mbps 4 CLOAD = 3pF, data rate = 5kbps, 8 4 MAX337/ HIGH-to-LOW Traition Device-to-Device Skew (Driving ) C LOAD = 1pF, data rate = 2Mbps (Note 3) 2 C LOAD = 5pF, data rate = 1Mbps 4 C LOAD = 3pF, data rate = 5kbps, 5 3

4 Tralators in SC7 and µdfn MAX337/ ELECTRICAL CHARACTERISTICS (continued) ( = +2.5V to +5.5V, = +1.6V to +5.5V (Note 1), = ;, unconnected; T A = -4 C to +85 C, unless otherwise noted. Typical values are at T A = +25 C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LOW-to-HIGH Traition Device-to-Device Skew (Driving ) HIGH-to-LOW Traition Device-to-Device Skew (Driving ) LOW-to-HIGH Traition Device-to-Device Skew (Driving ) Maximum Data Rate C LOAD = 1pF, data rate = 2Mbps (Note 3) 5 C LOAD = 5pF, data rate = 1Mbps 8 C LOAD = 3pF, data rate = 5kbps, C LOAD = 1pF, data rate = 2Mbps (Note 3) 2 C LOAD = 5pF, data rate = 1Mbps 4 C LOAD = 3pF, data rate = 5kbps, C LOAD = 1pF, data rate = 2Mbps (Note 3) 7 C LOAD = 5pF, data rate = 1Mbps 8 C LOAD = 3pF, data rate = 5kbps, 5 C LOAD = 1pF (Note 5) 2 3 C LOAD = 5pF 1 2 C LOAD = 3pF, Mbps Note 1: must always be less than or equal to. Note 2: All units are 1% production tested at T A = +25 C. Limits over the operating temperature range are guaranteed by design and not production tested. Note 3: Tested only at worst case: = +2.5V, = +1.6V. Note 4: 1% to 9%. Note 5: Guaranteed by correlation to C LOAD = 5pF. 4

5 Tralators in SC7 and µdfn +1.6V t RISE, t FALL 1 t PD-VCC-LH t RVCC +2.5V MAX337 DATA t PD-VCC-HL t FVCC R LOAD C LOAD C LOAD +1.6V t RISE, t FALL 1 t PD-VL-LH MAX337 DATA R LOAD t RVL +2.5V t PD-VL-HL t FVL MAX337/ Figure 1a. Rail-to-Rail Driving Figure 1b. Rail-to-Rail Driving +1.6V +2.5V +1.6V +2.5V MAX337 DATA R LOAD C LOAD C LOAD MAX337 DATA R LOAD t RISE, t FALL 1 t RISE, t FALL 1 t PD-VCC-LH t PD-VCC-HL t PD-VL-LH t PD-VL-HL t RVCC t FVCC t RVL t FVL Figure 1c. Open-Drain Driving Figure 1d. Open-Drain Driving 5

6 Tralators in SC7 and µdfn MAX337/ (Driving rail-to-rail, R L = 1MΩ,T A = +25 C, unless otherwise noted.) IVL (μa) SUPPLY CURRENT vs. POWER-SUPPLY VOLTAGE RATE = 5kbps, CLOAD = 3pF, = 1.8V RATE = 1Mbps, C LOAD = 5pF RATE = 2Mbps, C LOAD = 1pF (V) MAX337-1 Typical Operating Characteristics IVCC (μa) SUPPLY CURRENT vs. POWER-SUPPLY VOLTAGE RATE = 1Mbps, C LOAD = 5pF RATE = 2Mbps, C LOAD = 1pF RATE = 5kbps, C LOAD = 3pF, (V) = 1.8V MAX337-2 IVL (μa) SUPPLY CURRENT vs. TEMPERATURE = 1.8V, RATE = 5kbps, C LOAD = 3pF, = 2.5V = 3.3V = 5.V TEMPERATURE ( C) MAX337-3 IVCC (μa) SUPPLY CURRENT vs. TEMPERATURE = 5.V = 1.8V, RATE = 5kbps, C LOAD = 3pF, = 3.3V = 2.5V TEMPERATURE ( C) MAX = 1.8V = 3.3V SUPPLY CURRENT vs. LOAD CAPACITANCE MAX = 1.8V = 3.3V SUPPLY CURRENT vs. LOAD CAPACITANCE MAX RATE = 2Mbps, C LOAD = 1pF RATE = 1Mbps, C LOAD = 5pF IVL (μa) 1 95 IVCC (μa) RATE = 5kbps, C LOAD = 3pF, RATE = 2Mbps, C LOAD = 1pF RATE = 1Mbps, C LOAD = 5pF RATE = 5kbps, C LOAD = 3pF, C LOAD (pf) C LOAD (pf) 6

7 Tralators in SC7 and µdfn (Driving rail-to-rail, R L = 1MΩ, T A = +25 C, unless otherwise noted.) PROPAGATION DELAY () PROPAGATION DELAY vs. LOAD CAPACITANCE (DRIVING ) = 1.8V = 3.3V LOW-TO-HIGH TRANSITION HIGH-TO-LOW TRANSITION C LOAD (pf) MAX337-7 PROPAGATION DELAY () Typical Operating Characteristics (continued) PROPAGATION DELAY vs. LOAD CAPACITANCE (DRIVING ) 35 = 1.8V = 3.3V HIGH-TO-LOW TRANSITION LOW-TO-HIGH TRANSITION C LOAD (pf) MAX V/div RAIL-TO-RAIL DRIVING (RATE = 2Mbps, C LOAD = 1pF, = 3.3V, = 1.8V) 1/div MAX337-9 MAX337/ RAIL-TO-RAIL DRIVING (RATE = 1Mbps, C LOAD = 5pF, = 3.3V, = 1.8V) OPEN-DRAIN DRIVING (RATE = 5kbps, C LOAD = 3pF, = 3.3V, = 1.8V) MAX337-1 MAX V/div 1V/div 2/div 4/div OPEN-DRAIN DRIVING (RATE = 5kbps, C LOAD = 3pF, = 5V, = 2.5V) EXITING SHUTDOWN MAX MAX V/div 2V/div V SHDN 4/div 1/div 7

8 Tralators in SC7 and µdfn MAX337/ (SC7-5) MAX337 PIN (μdfn-6) (SC7-6 AND μdfn-6) NAME Logic Supply Voltage Ground Input/Output Referred to Input/Output Referred to Power-Supply Voltage 5 SHDN 5 N.C. No Connection FUNCTION Pin Description Shutdown. A high tur on the device. A low shuts down the device. and are high impedance in shutdown. Detailed Description The MAX337/ provide the necessary level tralation to allow data trafer in a multivoltage system. These devices tramit data between an I/O pin referenced to and an I/O pin referenced to. The supply voltage range is from +2.5V to +5.5V, and the supply voltage range is between +1.6V and +5.5V. The features a shutdown mode in which and are placed in a high-impedance state and supply current drops to 1µA. The MAX337/ are bidirectional level shifters allowing data trafer from the side to the side, and from the side to the side. Both devices operate at speeds up to 2Mbps with an active driver and up to 5kbps with an r. Level Tralation The MAX337/ provide bidirectional level tralation between I/O pi referred to and. and are internally pulled up to their respective power-supply rails through 1kΩ resistors. must be between +2.5V and +5.5V, and must be between +1.6V and +5.5V. For proper operation, can not exceed. The MAX337/ can operate at data rates up to 2Mbps when driven by an active (push-pull) driver with a 1pF load, 1Mbps when driven by an active driver with a 5pF load, or 5kbps when driven by an r with a 3pF load. The internal pullups allow these devices to be driven by rs. R 1 S 1 Functional Diagram MNSW SPEEDUP MAX337 Shutdown Mode The enters a low-power shutdown mode when SHDN is driven low. Connect SHDN to or drive high for normal operation. Activating shutdown mode disconnects the internal 1kΩ pullup resistors on I/O and. As a result, the supply current decreases to < 1µA, and the I/O lines are high impedance. The high impedance I/O lines in shutdown allow use in a multidrop network. When in shutdown, can be driven to and can be driven to. S 2 R 2 8

9 Tralators in SC7 and µdfn Speed-Up The speed-up circuit is a one-shot generator that helps the rise time of the output waveform in the low-to-high traition. When triggered, switches S 1 and S 2 turn on for 32 to pull up and. This greatly reduces the rise time and propagation delay for the low-to-high traition as well as improves the duty cycle (closer to 5% for an ideal square-wave input). See the scope plots in the Typical Operating Characteristics for the speed-up circuitry in operation. Applicatio Information Power-Supply Decoupling To reduce ripple and the chance of tramitting incorrect data, decouple and to ground with a.1µf capacitor as close to the device as possible. I 2 C Level Tralation The MAX337/ are ideal for level tralation between a low-voltage ASIC and an I 2 C device. The devices bidirectional natures allow their use in the data line of I 2 C communicatio. A typical application is interfacing a low-voltage microprocessor to a 3V or 5V D/A converter, such as the MAX517. The I/O lines on the MAX337/ are bidirectional, can be level-shifted up to +5.5V, and contain internal 1kΩ pullup resistors to allow open-drain driving (see the Typical Operating Circuit). Push-Pull vs. Open-Drain Driving The MAX337/ I/O pi can be driven by a push-pull or open-drain device. When using a push-pull driver, the MAX337/ operate up to 2Mbps with a 1pF load or 1Mbps with a 5pF load. The internal pullup resistors on the I/O pi allow use with opendrain devices. The MAX337/ operate up to 5kbps with a 3pF load when driven by an opendrain device. Data rates higher than those listed in the Electrical Characteristics table can be achieved. The maximum data rate is limited to 3Mbps by the speed-up circuitry. Unidirectional vs. Bidirectional Level Tralator The MAX337/ may also be used to tralate unidirectional signals without signal inversion. The devices provide the smallest solution (SC7 package) for unidirectional level tralation without inversion. MAX337/ PROCESS: BiCMOS Chip Information Package Information For the latest package outline information and land patter, go to PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 5 SC7 X SC7 X6SN µdfn L

10 Tralators in SC7 and µdfn MAX337/ REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED 1/ Initial release 3 5/9 Updated Ordering Information, style edits. 1, 5, 8, 9, 11 Maxim cannot assume respoibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licees are implied. Maxim reserves the right to change the circuitry and specificatio without notice at any time. 1 Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.