19-2321; Rev 0; 4/02 ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect Features ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ♦ ±15kV ESD Protection On D+ and DComplies with USB Standard 1.1 (Full Speed 2.0) USB Skew Independent of Input Skew Separate VP and VM Inputs/Outputs VL Down to 1.8V Allows Connection with LowVoltage ASICs Reenumerate with Power Applied USB Detect Function Allows Single-Ended or Differential Logic I/O Internal Linear Regulator Allows Direct Powering from the USB Internal Termination Resistor for Full-Speed Operation Three-State Outputs No Power-Supply Sequencing Required Driver Active in Suspend Mode Available in Miniature Chip-Scale Package Applications Ordering Information Cell Phones PC Peripherals PART TEMP RANGE PIN-PACKAGE Information Appliances MAX3341EEUD -40°C to +85°C 16 TSSOP Data Cradles MAX3341EEBE* -40°C to +85°C 4 ✕ 4 UCSP** PDAs *Future product—contact factory for availability. MP3 Players **UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. See the UCSP Reliability Notice in the UCSP Reliability section of this data sheet for more information. Digital Cameras Pin Configurations appear at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. Typical Operating Circuit 1µF SYSTEM SUPPLY VOLTAGE 0.1µF SYSTEM INTERFACE VL RCV MAX3341E VPI VMI SUSPEND OE USB_DET MODE ENUMERATE VPO VMO GND VCC VBUS 23.7Ω D+ 23.7Ω D- D+ DGND VTRM 1µF USB INTERFACE CONNECTOR ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX3341E General Description The MAX3341E USB level translator converts logic-level signals to USB signals, and USB signals to logic-level signals. An internal 1.5kΩ USB termination resistor supports full-speed (12Mbps) USB operation. The MAX3341E provides built-in ±15kV ESD-protection circuitry on the USB I/O pins, D+ and D-, and VCC. The MAX3341E operates with logic supply voltages as low as 1.8V, ensuring compatibility with low-voltage ASICs. The suspend mode lowers supply current to less than 50µA. A unique enumerate feature allows changes in USB communication protocol while power is applied. The MAX3341E is fully compliant with USB specification 1.1, and full-speed operation under USB specification 2.0. The MAX3341E has a USB detect that monitors the USB bus for insertion and signals this event. The MAX3341E is available in the miniature 4 ✕ 4 UCSP™, as well as the small 16-pin TSSOP, and is specified over the extended temperature range, -40°C to +85°C. MAX3341E ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect ABSOLUTE MAXIMUM RATINGS Maximum Continuous Current (all other pins) ..................±15mA Continuous Power Dissipation (TA = +70°C) 16-Pin TSSOP (derate 7.1mW/°C above +70°C) .........571mW 4 ✕ 4 UCSP (derate 8.2 mW/°C above +70°C) ............659mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C (All Voltages Refer to GND Unless Otherwise Noted.) Supply Voltage (VCC) ...............................................-0.3V to +6V Output of Internal Regulator (VTRM) (Note 1) ..........-0.3V to +6V Input Voltage (D+, D-) (Notes 1, 2) ..........................-0.3V to +6V System Supply Voltage (VL) .....................................-0.3V to +6V RCV, SUSP, VMO, MODE, VPO, OE, VMI, VPI, USB_DET, ENUM...................................-0.3V to (VL + 0.3V) Short-Circuit Current (D+, D-) to VCC or Ground (Note 3) .........................................................Continuous Note 1: Guaranteed for VCC < +3.7V only. Note 2: Absolute Maximum Rating for input voltage (D+, D-) with VCC > +3.7V is -0.3V to (VCC +0.3V). Note 3: External 23.7Ω resistors connected to D+ and D-. 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 conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = 4V to 5.5V bypassed with 1µF to GND, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25°C.) PARAMETER SYMBOL USB Supply Voltage VCC USB Supply Current ICC CONDITIONS MIN TYP 4 Data rate = 12Mbps, CL = 50pF (Figure 6b) 10 MAX UNITS 5.5 V 20 mA SUSP = high, ENUM = low, OE = high 50 SUSP = high, OE = low 85 µA USB SUSP Supply Current ICC(SUSP) SUSP = high, ENUM = high, OE = high 85 VCC Supply Current ICC(< 3V) VCC < 3V 80 µA D+/D- Leakage Current ID+/D-(3V) VCC = 3V; D+, D- < 3.6V 10 µA SUSP = high, 0 < VCC < 5.5V 20 µA 3.6 V VL Suspend Supply Current IL(SUSP) LOGIC-SIDE I/O VL Input Range VL 1.8 Input High Voltage VIH SUSP, MODE, ENUM, OE, VMO, VPO Input Low Voltage VIL SUSP, MODE, ENUM, OE, VMO, VPO Output Voltage High VOH VPI, VMI, RCV, USB_DET; ISOURCE = 1mA Output Voltage Low VOL 2/3 ✕ VL 0.4 VL - 0.2 V V VPI, VMI, RCV, USB_DET; ISINK = -1mA SUSP, MODE, ENUM, OE, VMO, VPO = 0 or VL Input Leakage Current V ±1 0.4 V ±10 µA 0.3 V 3.6 V USB-SIDE I/O 2 Output Voltage Low VOL D+ or D- Output Voltage High VOH D+ or D- Input Impedance ZIN Three-state driver Single-Ended Input Voltage High VIH Single-Ended Input Voltage Low VIL Receiver Single-Ended Hysteresis VHYS Differential Input Sensitivity VDIFF 2.8 1 MΩ 2.0 V 0.8 200 200 _______________________________________________________________________________________ V mV mV ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect (VCC = 4V to 5.5V bypassed with 1µF to GND, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25°C.) PARAMETER SYMBOL Input Common-Mode Voltage Range VCM Driver Output Impedance ZOUT Internal Resistor Termination Voltage USB_DET Threshold USB_DET Hysteresis CONDITIONS Including 23.7Ω (±1%) external resistors MIN TYP MAX UNITS 0.8 2.5 V 28.5 43.5 Ω RPU 1.425 1.500 1.575 kΩ VTRM 3.0 3.3 3.6 V VUSBLH 4.0 VUSBHL 3.7 VUSBHYS V 25 mV 30 dB LINEAR REGULATOR Power-Supply Rejection Ratio PSRR f = 10kHz, COUT = 1µF, D+/D- load External Capacitor COUT Compensation of linear regulator 1 µF ESD PROTECTION (VCC, D+, D-) Human Body Model ±15 kV IEC1000-4-2 Air-Gap Discharge ±15 kV IEC1000-4-2 Contact Discharge ±8 kV TIMING CHARACTERISTICS (VCC = 4V to 5.5V, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25°C.) (Figures 2–6) PARAMETER SYMBOL CONDITIONS OE to Transmit Delay Enable Time tPZD Figure 6c OE to Driver Three-State Delay Driver Disable Time tPDZ Figure 6c tDUSB Figure 6b USB Detect Signal Delay MIN TYP 15 MAX UNITS 80 ns 25 ns 7.5 µs TRANSMITTER VPO/VMO to D+/D- Propagation Delay tPLH1(drv) MODE = high , Figure 6c 30 tPHL1(drv) MODE = high, Figure 6c 30 VPO to D+/D- Propagation Delay tPLH0(drv) MODE = low, Figure 6c 35 tPHL0(drv) MODE = low, Figure 6c 35 ns ns Rise Time D+/D- tR 4 20 ns Fall Time D+/D- tF 4 20 ns 90 110 % 1.3 2 V Rise- and Fall-Time Matching tR/tF Output Signal Crossover VCRS (Note 4) DIFFERENTIAL RECEIVER (Figure 6a) tPLH(RCV) 30 tPHL(RCV) 30 Rise Time RCV tR 15 ns Fall Time RCV tF 15 ns D+/D- to RCV Propagation Delay ns _______________________________________________________________________________________ 3 MAX3341E ELECTRICAL CHARACTERISTICS (continued) TIMING CHARACTERISTICS (continued) (VCC = 4V to 5.5V, GND = 0, VL = 1.8V to 3.6V, D+ to GND = 15kΩ, D- to GND = 15kΩ, ENUM = VL, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = 5V, VL = 2.5V, TA = +25°C.) (Figures 2–6) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SINGLE-ENDED RECEIVERS D+/D- to VPI or VMI Propagation Delay tPLH(SE) Figure 6a 15 tPHL(SE) Figure 6a 15 ns Rise Time VPI and VMI tR(SE) Measured from 10% to 90%,Figure 6a 15 ns Fall Time VPI and VMI tF(SE) Measured from 90% to 10%, Figure 6a 15 ns 140 ns Time to Detect Single-Ended Zero 14 tSE0 Note 4: Production tested at +25°C and +85°C only. Limit at -40°C guaranteed by correlation. Typical Operating Characteristics (VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.) DIFFERENTIAL RECEIVER PROPAGATION DELAY vs. VCC TA = +25°C 14 11 MAX3341 toc02 10 16 TA = +25°C 14 12 10 TA = -40°C TA = +85°C 9 PROPAGATION DELAY (ns) 17 TA = +85°C 18 PROPAGATION DELAY (ns) TA = +85°C PROPAGATION DELAY (ns) 20 MAX3341 toc01 20 SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VL MAX3341 toc03 DIFFERENTIAL RECEIVER PROPAGATION DELAY vs. VL 8 TA = +25°C 7 6 TA = -40°C 5 TA = -40°C 8 4 4.00 3.3 2.8 4.25 4.50 SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VCC 5.25 5.50 TA = +85°C 50 TA = +85°C 45 8 TIME (ns) TA = +25°C 7 35 TA = +25°C 30 25 TA = -40°C 5 TA = -40°C 20 4 4.75 VCC (V) 5.00 5.25 5.50 2.8 2.7 2.6 2.5 TA = -40°C 2.4 TA = +25°C 2.3 2.2 2.1 2.0 1.9 1.8 TA = +85°C 1.7 1.6 15 4.50 3.3 2.8 TRANSMITTER SKEW vs. VCC 6 4.25 2.3 VL (V) 40 4.00 1.8 TIME TO ENTER SUSPEND MODE vs. VCC MAX3341 toc04 10 4 5.00 VCC (V) VL (V) 9 4.75 TRANSMITTER SKEW (ns) 2.3 MAX3341 toc05 1.8 MAX3341 toc06 8 PROPAGATION DELAY (ns) MAX3341E ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect 4.00 4.25 4.50 4.75 VCC (V) 5.00 5.25 5.50 4.00 4.25 4.50 4.75 VCC (V) _______________________________________________________________________________________ 5.00 5.25 5.50 ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect CURRENT CONSUMPTION IN SUSPEND MODE 25.0 IVTRM = 15mA 3.4 IVCC (µA) 6 5 VTRM (V) 24.5 7 IVL (µA) 3.5 MAX3341 toc08 8 VTRM vs. VCC 25.5 MAX3341 toc07 9 MAX3341 toc09 LOGIC CURRENT CONSUMPTION IN SUSPEND MODE 24.0 23.5 3.3 3.2 23.0 3.1 4 22.5 3 22.0 1.8 2.3 2.8 3.0 4.00 3.3 VL (V) 4.25 4.50 4.75 5.00 5.25 5.50 4.00 VCC (V) 4.50 4.75 5.25 5.50 TRANSMISSION IN SUSPEND MODE (SUSP = 1) MAX3341 toc12 MAX3341 toc11 MAX3341 toc10 5.00 VCC (V) SUSPEND RESPONSE RISE-AND-FALL TIME MATCHING 4.25 f = 6MHz VPO D+ SUSP VMO 0 1V/div 2V/div D- 2V/div D+ RCV 0 D- 20ns/div 2µs/div 100ns/div USB_DET RESPONSE MAX3341 toc13 VCC 2V/div 0 USB_DET 0 10µs/div _______________________________________________________________________________________ 5 MAX3341E Typical Operating Characteristics (continued) (VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.) ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect MAX3341E Pin Description PIN NAME TSSOP UCSP 1 D2 RCV 2 D1 VPO 3 C2 MODE 4 C1 VMO 5 B1 OE 6 B2 SUSP 7 A1 VPI 8 A2 VMI FUNCTION Receiver Output. Single-ended CMOS output. RCV responds to the differential input on D+ and D-. ASIC Voltage Positive Output. Logic-level data into the MAX3341E. Mode-Control Input. Selects differential (mode 1) or single-ended (mode 0) input for the system side when converting logic-level signals to USB level signals. Force MODE high to select mode 1. Force MODE low to select mode 0. ASIC Voltage Minus Output. Logic-level data into the MAX3341E. Output Enable. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or to receive data. Suspend Input. Drive SUSP low for normal operation. Drive SUSP high for low-power state. In low-power state, RCV is low, and VPI/VMI are active. ASIC Voltage Positive Input. Logic-level data output from the MAX3341E. ASIC Voltage Minus Input. Logic-level data output from the MAX3341E. Enumerate. Drive ENUM high to connect the internal 1.5kΩ resistor from D+ to 3.3V. Drive ENUM low to disconnect the internal 1.5kΩ resistor. 9 B3 ENUM 10 A3 VCC USB-Side Power-Supply Input. Connect VCC to the incoming USB power supply. Bypass VCC to GND with a 1µF ceramic capacitor. 11 A4 GND Ground 12 B4 D- Negative USB Differential Data Input/Output. Connect to the USB’s D- signal through a 23.7Ω ±1% resistor. 13 C4 D+ Positive USB Differential Data Input/Output. Connect to the USB’s D+ signal through a 23.7Ω ±1% resistor. 14 D4 VTRM 15 D3 VL System-Side Power-Supply Input. Connect to the system’s logic-level power supply, 1.8V to 3.6V. 16 C3 USB_DET USB Detector Output. A high at USB_DET signals to the ASIC that VCC is present. A low at USB_DET indicates that VCC is not present. Regulated Output Voltage. 3.3V output derived from the VCC input. Bypass VTRM to GND with a 1µF (min) low-ESR capacitor such as ceramic or plastic film types. Detailed Description The MAX3341E is a bidirectional level translator that converts single-ended or differential logic-level signals to differential USB signals, and converts differential USB signals to single-ended or differential logic-level signals. The MAX3341E includes an internal 1.5kΩ pullup resistor that connects and disconnects D+ to VTRM (Functional Diagram). The MAX3341E is tolerant to power sequencing with either VCC > VL or VL > VCC. Additionally, the USB I/O, D+ and D-, and VCC are ESD protected to ±15kV. The MAX3341E can receive USB power (VCC) directly from the USB connection, and 6 operates with logic supplies (VL) down to 1.8V while still meeting the USB physical layer specifications. The MAX3341E supports full-speed (12Mbps) USB specification 2.0 operation. The MAX3341E has a unique enumerate feature that functions when power is applied. Driving ENUM low disconnects the internal 1.5kΩ termination resistor from D+ enumerating the USB. This is useful if changes in communication protocol are required while power is applied, and while the USB cable is connected. _______________________________________________________________________________________ ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect D+ and DD+ and D- are the USB side transmitter I/O connections, and are ESD protected to ±15kV using the Human Body Model, ±15kV using IEC 1000-4-2 AirGap Discharge, and ±8kV using IEC 1000-4-2 Contact Discharge, making the MAX3341E ideal for applications where a robust transmitter is required. A 23.7Ω resistor is required on D+ and D- for normal operation (see External Resistors). The MAX3341E contains unique circuitry to ensure the USB skew is independent of the input skew on VPO and VMO. Input skews of up to 10ns are ignored and do not show up on the output. ENUM USB specification 2.0 requires a 1.5kΩ pullup resistor on D+ for full-speed (12Mbps) operation. Controlled by enumerate (ENUM), the MAX3341E provides this internal 1.5kΩ resistor. Drive ENUM high to connect the pullup resistor from D+ to VTRM. Drive ENUM low to disconnect the pullup resistor from D+ to VTRM. VPO/VMO, VPI/VMI, and OE The MAX3341E system-side inputs are VPO and VMO. Data from an ASIC comes into the MAX3341E through VPO and VMO. VPO and VMO operate either differentially with VPO as the positive terminal and VMO as the negative terminal, or single ended with VPO as the data input (see MODE section). The MAX3341E system-side outputs are VPI, VMI, and RCV. The MAX3341E sends data to an ASIC through VPI, VMI, and RCV. VPI and VMI are outputs to the single-ended receivers and RCV is the output of the differential receiver. Output enable (OE) controls data transmission. Drive OE low to enable data transmission on D+ and D-. Drive OE high to disable data transmission or receive data. MODE MODE is a control input that selects whether differential or single-ended logic signals are recognized by the system side of the MAX3341E. Drive MODE high to select differential mode with VPO as the positive terminal and VMO as the negative terminal. Drive MODE low to select single-ended mode with VPO as the data input (Table 1). VTRM VTRM is the 3.3V output of the internal linear voltage regulator. VTRM powers the internal circuitry of the USB side of the MAX3341E. Connect a 1µF (min) low-ESR ceramic or plastic capacitor from VTRM to GND, as close to VTRM as possible. VCC In most applications, VCC is derived from the USB 5V output. If supplying VCC with an alternative power supply such as a lithium-ion battery, the VCC input range is 4.0V to 5.5V. If VCC drops below 4.0V, supply current drops to 10µA avoiding excessive battery drain, and D+/Denter a high-impedance state allowing other devices to drive the lines. Bypass VCC to GND with a 1µF ceramic capacitor as close to the device as possible. USB Detect USB detect output (USB_DET) signals to the ASIC that VCC is present. A high at USB_DET indicates that VCC is present, while a low at USB_DET indicates that VCC is not present. SUSP Suspend (SUSP) is a control input. Force SUSP high to place the MAX3341E in a low-power state. In this state, the quiescent supply current into VCC is less than 50µA and RCV goes low. In suspend mode, VPI and VMI remain active as receive outputs and VTRM stays on. The MAX3341E continues to receive data from the USB, allowing the µP to sense activity on the D+/D- lines and wake up the MAX3341E. The MAX3341E can also transmit data to D+ and Dwhile in suspend mode. This function is used to signal a remote wakeup by driving a signal on D+ and D- for a period of 1ms to 15ms. Slew rate control is not active during suspend mode, and data can only be sent at data rates up to 200kps. Data Transfer Receiving Data from the USB Data received from the USB are output to VPI/VMI in either of two ways, differentially or single ended. To receive data from the USB, force OE high and SUSP low. Differential data arriving at D+/D- appear as differential logic signals at VPI/VMI, and as a single-ended logic signal at RCV. If both D+ and D- are low, then VPI and VMI are low, signaling a single-ended zero condition on the bus; RCV is undefined (Table 1). Transmitting Data to the USB The MAX3341E outputs data to the USB differentially on D+ and D-. The logic driving signals may be either differential or single ended. For sending differential logic, force MODE high, force OE and SUSP low, and apply data to VPO and VMO. D+ then follows VPO, and Dfollows VMO. To send single-ended logic signals, force _______________________________________________________________________________________ 7 MAX3341E Device Control MAX3341E ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect Table 1a. Truth Table Transmit (SUSP = 0, OE = 0, ENUM = X) INPUT OUTPUT MODE VPO VMO D+ D- RCV VPI VMI RESULT 0 0 0 0 1 0 0 1 LOGIC 0 0 0 1 0 0 X 0 0 SE0 0 1 0 1 0 1 1 0 LOGIC 1 0 1 1 0 0 X 0 0 SE0 1 0 0 0 0 X 0 0 SE0 1 0 1 0 1 0 0 1 LOGIC 0 1 1 0 1 0 1 1 0 LOGIC 1 1 1 1 1 1 X 1 1 UNDEFINED Table 1b. Truth Table Receive (SUSP = 0, OE = 1, ENUM = X) INPUT OUTPUT D+ D- RCV VPI VMI 0 0 X 0 0 SE0 0 1 0 0 1 LOGIC 0 1 0 1 1 0 LOGIC 1 1 1 X 1 1 UNDEFINED RESULT Table 1c. Truth Table Transmit in Suspend* (SUSP = 1, OE = 0, ENUM = X) INPUT OUTPUT MODE VPO VMO D+ 0 0 0 0 0 0 1 0 0 1 0 1 0 1 1 1 0 0 1 0 1 1 D- RCV VPI VMI RESULT 1 0 0 0 0 1 LOGIC 0 0 0 0 SE0 0 1 0 LOGIC 1 0 0 0 0 0 0 SE0 0 0 0 0 1 SE0 0 1 0 0 1 LOGIC 0 1 1 0 1 0 0 1 0 LOGIC 1 1 1 1 0 1 1 UNDEFINED *Timing specifications are not guaranteed for D+ and D-. Table 1d. Truth Table Receive in Suspend* (SUSP = 1, OE = 1, MODE = X, VPO/VMO = X, ENUM = X) INPUT OUTPUT D+ D- RCV VPI VMI RESULT 0 0 0 0 0 VPI/VMI ACTIVE 0 1 0 0 1 VPI/VMI ACTIVE 1 0 0 1 0 VPI/VMI ACTIVE 1 1 0 1 1 VPI/VMI ACTIVE *Timing specifications are not guaranteed for D+ and D-. 8 _______________________________________________________________________________________ ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR ESD Protection To protect the MAX3341E against ESD, D+ and Dhave extra protection against static electricity to protect the device up to ±15kV. The ESD structures withstand high ESD in all states—normal operation, suspend, and powered down. In order for the 15kV ESD structures to work correctly, a 1µF or greater capacitor must be connected from VTRM to GND. ESD protection can be tested in various ways; the D+ and D- input/output pins are characterized for protection to the following limits: 1) ±15kV using the Human Body Model 2) ±8kV using the IEC 1000-4-2 Contact Discharge method 3) ±15kV using the IEC 1000-4-2 Air-Gap method ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 1a shows the Human Body Model, and Figure 1b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5kΩ resistor. IEC 1000-4-2 The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3341E helps the user design equipment that meets level 4 of IEC 1000-4-2, without the need for additional ESD-protection components. The major difference between tests done using the Human Body Model and IEC 1000-4-2 is a higher peak current in IEC 1000-4-2, because series resistance is lower in the IEC 1000-4-2 model. Hence, the ESD withstand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 1c shows the IEC 1000-4-2 model. The Air-Gap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized. HIGHVOLTAGE DC SOURCE Cs 100pF MAX3341E MODE, SUSP, and OE low, and apply data to VPO/VMO. When VMO is high, a single-ended zero condition is sent on the bus and RCV is undefined (Table 1). RD 1500Ω DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR Figure 1a. Human Body ESD Test Models IP 100% 90% Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Figure 1b. Human Body Model Current Waveform RC 50MΩ TO 100MΩ CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF RD 330Ω DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST Figure 1c. IEC 1000-4-2 ESD Test Model Machine Model The Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that _______________________________________________________________________________________ 9 MAX3341E ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing. Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports. VL OE VL/2 Applications Information 0 tPDZ tPZD External Components VOHD - 0.3V D+/DVOLD + 0.3V Figure 2. Enable and Disable Timing, Transmitter External Capacitors Use three external capacitors for proper operation. Use a 0.1µF ceramic for decoupling VL, a 1µF ceramic for decoupling VCC, and a 1.0µF (min) ceramic or plastic filter capacitor on VTRM. Return all capacitors to GND. VL VPO UCSP Reliability VL/2 The UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. CSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a CSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as it is primarily determined by the wafer-fabrication process. 0 tPHLO 2V D+/D0.8V Figure 3. Mode 0 Timing VL VPO/VMO VL/2 0 tPLH1 2V D+/D- External Resistors Two external 23.7Ω ±1%, 1/2W resistors are required for USB connection. Place the resistors in between the MAX3341E and the USB connector on the D+ and Dlines. See Typical Operating Circuit. tPHL1 Mechanical stress performance is a greater consideration for a CSP package. CSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be considered. Table 2 shows the testing done to characterize the CSP reliability performance. In conclusion, the UCSP is capable of performing reliably through environmental stresses as indicated by the results in Table 2. Additional usage data and recommendations are detailed in the UCSP application note, which can be found on Maxim’s website at www.maxim-ic.com. 0.8V Figure 4. Mode 1 Timing 10 ______________________________________________________________________________________ ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect 3V D- 0V tPHL(RCV) MAX3341E D+ tPLH(RCV) VL RCV VL/2 0V tPHL(SE) tPLH(SE) VL VPI VL/2 0V tPLH(SE) VMI tPHL(SE) VL VL/2 0V D+/D- RISE/FALL TIMES ≤ 8ns, VL = 1.8V, 2.5V, 3.3V Figure 5. D+/D- to RCV, VPI, VMI Propagation Delays ______________________________________________________________________________________ 11 MAX3341E ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect TEST POINT 3.3V D+ MAX3341E 23.7Ω TEST POINT VMI OR VPI OR RCV 1.5kΩ CL 15kΩ 25pF MAX3341E TEST POINT (a) LOAD FOR VPI, VMI, AND RCV 23.7Ω DCL 15kΩ MAX3341E 24Ω USB_DET TEST POINT 200Ω D+ OR D25pF 50pF + - (b) LOAD FOR D+, D-, AND USB_DET GND OR VCC (c) LOAD FOR ENABLE AND DISABLE TIME, D+/D- Figure 6. Test Circuits Table 2. Reliability Test Data TEST Temperature Cycle Operating Life Moisture Resistance Low-Temperature Storage Low-Temperature Operational Solderability ESD High-Temperature Operating Life CONDITIONS DURATION NO. OF FAILURES PER SAMPLE SIZE -35°C to +85°C, -40°C to +100°C 150 cycles, 900 cycles 0/10, 0/200 TA = +70°C 240hr 0/10 +20°C to +60°C, 90% RH 240hr 0/10 -20°C 240hr 0/10 -10°C 24hr 0/10 8hr steam age — 0/15 ±2000V, Human Body Model — 0/5 TJ = +150°C 168hr 0/45 Chip Information TRANSISTOR COUNT: 2162 PROCESS: BiCMOS 12 ______________________________________________________________________________________ ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect USB SUPPLY VCC LINEAR REGULATOR VL Vbg OE BANDGAP USB_DET ENUM VTRM TO INTERNAL CIRCUITS MAX3341E RCV RECEIVER GND 1.5kΩ SUSP TRANSMITTER D- 23.7Ω VMO MODE D+ VPO OE 23.7Ω EXTERNAL RESISTORS TO INTERNAL CIRCUITS VMI USB_DET VPI Vbg SINGLE-ENDED RECEIVERS Pin Configurations 1 TOP VIEW RCV 1 16 USB_DET VPO 2 15 VL MODE 3 14 VTRM VMO 4 OE 5 MAX3341E 13 D+ 12 D- SUSP 6 11 GND VPI 7 10 VCC VMI 8 9 TSSOP ENUM 2 3 4 BOTTOM VIEW MAX3341E D VPO RCV VL VTRM C VMO MODE USB_DET D+ OE SUSP ENUM D- VPI VMI VCC GND B A UCSP ______________________________________________________________________________________ 13 MAX3341E Functional Diagram Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) 4x4 UCSP.EPS MAX3341E ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect 14 ______________________________________________________________________________________ ±15kV ESD-Protected USB Level Translator in UCSP with USB Detect TSSOP,NO PADS.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX3341E Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)