19-2924; Rev 1; 10/03 ±15kV ESD-Protected USB Transceivers The MAX3453E–MAX3456E operate over the extended temperature range (-40°C to +85°C) and are available in 14-pin TSSOP and 16-pin (3mm x 3mm) thin QFN packages. Applications Features ♦ ±15kV ESD Protection on D+ and D♦ USB 1.1 and USB 2.0 (Low-Speed and Full-Speed)Compliant Transceivers ♦ Combined VP and VM Inputs/Outputs ♦ +1.65V to +3.6V VL Logic Supply Input for Interfacing with Low-Voltage ASICs ♦ Enumerate Input Function (MAX3453E/MAX3454E) ♦ Powered from Li+ Battery as Low as +3.1V (MAX3454E/MAX3456E) ♦ VBUS Detection (MAX3453E/MAX3455E) ♦ Pin Compatible with Micrel MIC2550A (MAX3456E) ♦ Internal Pullup Resistor (MAX3453E/MAX3454E) ♦ No Power-Supply Sequencing Required Ordering Information PART TEMP RANGE o o PIN-PACKAGE MAX3453EEUD -40 C to +85 C 14 TSSOP MAX3453EETE -40oC to +85oC 16 Thin QFN MAX3454EEUD -40oC to +85oC 14 TSSOP o o PDAs MAX3454EETE -40 C to +85 C 16 Thin QFN PC Peripherals MAX3455EEUD -40oC to +85oC 14 TSSOP MAX3455EETE -40oC to +85oC 16 Thin QFN Cellular Telephones Data Cradles o o MAX3456EEUD -40 C to +85 C 14 TSSOP MAX3456EETE -40oC to +85oC 16 Thin QFN MP3 Players Selector Guide PART VBUS POWERSUPPLY VOLTAGE (V) VL POWERSUPPLY VOLTAGE (V) INTERNAL PULLUP RESISTOR VBUS LEVEL DETECT MAX3453E 4.0 to 5.5 1.65 to 3.6 Yes Yes Yes Full Yes MAX3454E 3.0 to 5.5 1.65 to 3.6 Yes No Yes Low/full Yes MAX3455E 4.0 to 5.5 1.65 to 3.6 No Yes No Low/full Yes MAX3456E 3.0 to 5.5 1.65 to 3.6 No No No Low/full Yes ENUMERATE USB SPEED SUPPORTED ±15kV ESD PROTECTION Typical Operating Circuit appears at end of data sheet. Pin Configurations appear at end of data sheet. ________________________________________________________________ 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 MAX3453E–MAX3456E General Description The MAX3453E–MAX3456E ±15kV ESD-protected USBcompliant transceivers interface low-voltage ASICs with USB devices. The devices fully comply with USB 1.1 and USB 2.0 when operating at full (12Mbps) and low (1.5Mbps) speeds. The MAX3453E–MAX3456E operate with VL as low as +1.65V, ensuring compatibility with low-voltage ASICs. The MAX3453E–MAX3456E feature a logic-selectable suspend mode that reduces current consumption to less than 40µA. Integrated ±15kV ESD protection protects the USB D+ and D- bidirectional bus connections. The MAX3453E supports only full-speed (12Mbps) operation. The MAX3453E/MAX3454E feature an internal 1.5kΩ USB pullup resistor and an enumeration function that allows devices to logically disconnect while plugged in. The MAX3453E/MAX3455E provide a pushpull bus-detect (BD) output that asserts high when VBUS > +4.0V. The MAX3456E is pin compatible with Micrel’s MIC2550A. MAX3453E–MAX3456E ±15kV ESD-Protected USB Transceivers ABSOLUTE MAXIMUM RATINGS VBUS, VL, D+, D- to GND.......................................-0.3V to +6.0V VTRM to GND ............................................-0.3V to (VBUS + 0.3V) VP, VM, SUS, ENUM, SPD, RCV, OE, BD to GND ................................-0.3V to (VL + 0.3V) Current (into any pin) ........................................................±15mA Short-Circuit Current (D+ and D-)...................................±150mA Continuous Power Dissipation (TA = +70°C) 14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW 16-Pin Thin QFN (derate 14.7mW/°C above +70°C)....1176mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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. DC ELECTRICAL CHARACTERISTICS (VBUS = +4.0V to +5.5V or VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VBUS = +5.0V, VL = +2.5V, and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 3.0 3.3 3.6 V SUPPLY INPUTS (VBUS, VTRM, VL) Regulated Supply Voltage Output VTRM Internal regulator Operating Supply Current IVBUS Full-speed transmitting and receiving at 12Mbps, CL = 50pF on D+ and D- (Note 2) 10 mA Full-speed transmitting and receiving at 12Mbps (Note 2) 2.5 mA Operating VL Supply Current IVL Full-Speed Idle and SE0 Supply Current IVBUS(IDLE) Static VL Supply Current IVL(STATIC) Suspend Supply Current Full-speed idle: VD+ > 2.7V, VD- < 0.3V 250 350 SE0: VD+ < 0.3V, VD- < 0.3V 250 350 Full-speed idle, SE0, or suspend mode MAX3453E/MAX3455E 15 MAX3454E/MAX3456E 5 µA MAX3453E (ENUM = low), VM = VP = open, MAX3455E IVBUS(SUSP) SUS = OE = high MAX3454E (ENUM = low), MAX3456E Disable Mode Supply Current Sharing Mode VL Supply Current D+/D- Sharing Mode Load Current D+/D- Disable Mode Load Current 2 IVBUS(DIS) VL = GND or open VBUS = GND or open, OE = low, IVL(SHARING) VP = low or high, VM = low or high, SUS = high 40 µA 35 20 MAX3453E/MAX3455E µA 20 µA MAX3454E/MAX3456E ID_(SHARING) VBUS = GND or open, VD_ = 0 or +5.5V ID_(DIS) µA VL = GND or open, VD_ = 0 or +5.5V _______________________________________________________________________________________ 5 20 µA 5 µA ±15kV ESD-Protected USB Transceivers (VBUS = +4.0V to +5.5V or VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VBUS = +5.0V, VL = +2.5V, and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX3453E/MAX3455E, supply lost MAX3453E/MAX3455E, supply present USB Power-Supply Detection Threshold VTH_VBUS USB Power-Supply Detection Hysteresis VHYST_VBUS VL Power-Supply Detection Threshold UNITS 3.6 4.0 MAX3454E/MAX3456E, supply lost MAX3454E/MAX3456E, supply present (Note 3) MAX 0.8 V 3.6 MAX3453E/MAX3455E 40 MAX3454E/MAX3456E 75 mV 0.85 VTH_VL V DIGITAL INPUTS/OUTPUTS (VP, VM, RCV, SUS, OE, SPD, BD, ENUM) VIL VM, VP, SUS, SPD, ENUM, OE Input Voltage High VIH VM, VP, SUS, SPD, ENUM, OE Output Voltage Low VOL VM, VP, RCV, BD, IOL = +2mA Output Voltage High VOH VM, VP, RCV, BD, IOH = -2mA Input Leakage Current ILKG Input Capacitance CIN Measured from input to GND Differential Input Sensitivity VID |VD+ - VD-| 0.2 Differential Common-Mode Voltage VCM Includes VID range 0.8 Single-Ended Input Low Voltage VILSE Input Voltage Low 0.3 x VL 0.7 x VL V V 0.4 VL - 0.4 V V -1 +1 10 µA pF ANALOG INPUTS/OUTPUTS (D+, D-) Single-Ended Input High Voltage VIHSE Hysteresis VHYST Output Voltage Low VOLD RL = 1.5kΩ to +3.6V Output Voltage High VOHD RL = 15kΩ to GND V V V 3.6 V -1 +1 µA Measured from D_ to GND Driver Output Impedance ZDRV Steady-state drive 3.5 Driver off 10 ILOAD = 500µA (MAX3453E/MAX3454E) (Note 4) mV 2.8 CIND RPULLUP 0.8 0.3 Transceiver Capacitance Internal Pullup Resistance V 250 ILZ ZIN 2.5 2.0 Off-State Leakage Current Input Impedance V 20 pF 15.5 Ω MΩ 1.425 1.575 kΩ ESD PROTECTION (D+, D-) Human Body Model ±15 kV IEC 1000-4-2 Contact Discharge ±8 kV _______________________________________________________________________________________ 3 MAX3453E–MAX3456E DC ELECTRICAL CHARACTERISTICS (continued) MAX3453E–MAX3456E ±15kV ESD-Protected USB Transceivers TIMING CHARACTERISTICS (VBUS = +4.0V to +5.5V or VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VBUS = +5V, VL = +2.5V, and TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DRIVER CHARACTERISTICS (Full-Speed Mode, CL = 50pF) Rise Time tFR 10% to 90% of |VOHD - VOLD|, Figures 1, 6 4 20 ns Fall Time tFF 90% to 10% of |VOHD - VOLD|, Figures 1, 6 4 20 ns Rise/Fall-Time Matching (Note 2) tFR / tFF Excluding the first transition from idle state, Figures 1, 6 90 110 % Output Signal Crossover Voltage (Note 2) VCRS_F Excluding the first transition from idle state, Figures 2, 6 1.3 2.0 V Driver Propagation Delay Driver Disable Delay Driver Enable Delay tPLH_DRV Low-to-high transition, Figures 2, 6 18 tPHL_DRV High-to-low transition, Figures 2, 6 18 tPHZ_DRV High-to-off transition, Figure 3 20 ns tPLZ_DRV Low-to-off transition, Figure 3 20 ns tPZH_DRV Off-to-high transition, Figure 3 20 ns tPZL_DRV Off-to-low transition, Figure 3 20 ns ns DRIVER CHARACTERISTICS (low-speed mode, CL = 200pF to 600pF, MAX3454E/MAX3455E/MAX3456E) Rise Time tLR 10% to 90% of |VOHD - VOLD|, Figures 1, 6 75 300 ns Fall Time tLF 90% to 10% of |VOHD - VOLD|, Figures 1, 6 75 300 ns Rise/Fall-Time Matching tLR / tLF Excluding the first transition from idle state, Figures 1, 6 80 125 % Output Signal Crossover Voltage VCRS_L Excluding the first transition from idle state, Figures 2, 6 1.3 2.0 V RECEIVER CHARACTERISTICS (CL = 15pF) Differential Receiver Propagation Delay tPLH_RCV Low-to-high transition, Figures 4, 6 22 tPHL_RCV High-to-low transition, Figures 4, 6 22 tPLH_SE Low-to-high transition, Figures 4, 6 12 tPHL_SE High-to-low transition, Figures 4, 6 12 Single-Ended Receiver Disable Delay tPHZ_SE High-to-off transition, Figure 5 15 tPLZ_SE Low-to-off transition, Figure 5 15 Single-Ended Receiver Enable Delay tPZH_SE Off-to-high transition, Figure 5 15 tPZL_SE Off-to-low transition, Figure 5 15 Single-Ended Receiver Propagation Delay Note 1: Note 2: Note 3: Note 4: 4 ns ns ns ns Parameters are 100% production tested at +25°C, unless otherwise noted. Limits over temperature are guaranteed by design. Guaranteed by design, not production tested. Production tested to +2.7V for VL < +3.0V. Including external 27Ω series resistor. _______________________________________________________________________________________ ±15kV ESD-Protected USB Transceivers SINGLE-ENDED RECEIVER PROPAGATION DELAY vs. VL MAX3453E-56E toc02 MAX3453E-56E toc01 8 CL = 15pF 7 TA = +25°C 6 TA = +85°C MAX3453E-56E toc03 CL = 50pF CL = 400pF 5 D+/D1V/div 4 D+/D1V/div TA = -40°C 3 2 1 0 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 20ns/div 100ns/div SUPPLY CURRENT vs. D+/D- CAPACITANCE LOGIC SUPPLY CURRENT vs. D+/D- CAPACITANCE MAX3453E-56E toc04 24 VP 2V/div VM 2V/div OE 5V/div MAX3453E-56E toc05 CL = 15pF 22 20 18 16 14 12 10 8 6 4 2 SPD = VL, fIN = 6MHz SPD = GND, fIN = 750kHz 450 SPD = VL, fIN = 6MHz 400 350 300 250 200 150 100 50 SPD = GND, fIN = 750kHz 0 0 20ns/div 500 LOGIC SUPPLY CURRENT (µA) OE, VP, VM TIMING 0 50 100 150 200 250 300 350 400 D+/D- CAPACITANCE (pF) MAX3453E-56E toc06 VL (V) SUPPLY CURRENT (mA) PROPAGATION DELAY (ns) RISE-/FALL-TIME MATCHING (LOW SPEED) RISE-/FALL-TIME MATCHING (FULL SPEED) 0 50 100 150 200 250 300 350 400 D+/D- CAPACITANCE (pF) _______________________________________________________________________________________ 5 MAX3453E–MAX3456E Typical Operating Characteristics (VBUS = +5.0V, VL = +3.3V, TA = +25°C, unless otherwise noted.) ±15kV ESD-Protected USB Transceivers MAX3453E–MAX3456E Pin Description PIN MAX3454E/ MAX3455E/ MAX3456E NAME TSSOP THIN QFN TSSOP THIN QFN 1 15 1 15 VL FUNCTION Digital I/O Connections Logic Supply. Connect a +1.65V to +3.6V supply to VL. Bypass VL to GND with a 0.1µF ceramic capacitor. 2 1 — — SPD Speed Selector Input. Connect SPD to GND to select the lowspeed data rate (1.5Mbps). Connect SPD to VL to select the fullspeed data rate (12Mbps). The MAX3453E only supports fullspeed operation. 3 2 3 2 RCV Differential Receiver Output. RCV responds to the differential inputs on D+ and D- (see Tables 3, 4). RCV asserts low if SUS = VL. 4 3 4 3 VP Receiver Output/Driver Input. VP functions as a receiver output when OE = VL. VP duplicates D+ when receiving. VP functions as a driver input when OE = GND. 5 4 5 4 VM Receiver Output/Driver Input. VM functions as a receiver output when OE = VL. VM duplicates D- when receiving. VM functions as a driver input when OE = GND. 6, 13* 5, 8, 13*, 16 6 5, 8, 16 N.C. No Connection. Not internally connected. *Pin 13 is No Connection for MAX3456E only. 7 6 7 6 GND Ground 8 7 8 7 SUS Suspend Input. Drive SUS low for normal operation. Drive SUS high to put the MAX3453E–MAX3456E into suspend mode. RCV asserts low in suspend mode. VP and VM remain active in suspend mode. 9 9 9 9 OE Output Enable. Drive OE to GND to enable the transmitter outputs. Drive OE to VL to disable the transmitter outputs. OE also controls the I/O direction of VP and VM (see Tables 3, 4). D- USB Input/Output. For OE = GND, D- functions as a USB output, with VM providing the input signal. For OE = VL, Dfunctions as a USB input, with VM functioning as a single-ended receiver output. Connect a 1.5kΩ resistor from D- to VTRM for low-speed (1.5Mbps) operation (MAX3455E/MAX3456E). Drive ENUM to VL to connect the internal 1.5kΩ resistor from D- to VTRM for low-speed (MAX3454E, SPD = GND) operation. 10 6 MAX3453E 10 10 10 _______________________________________________________________________________________ ±15kV ESD-Protected USB Transceivers PIN MAX3454E/ MAX3455E/ MAX3456E TSSOP 11 12 MAX3453E THIN QFN 11 12 13 13 (MAX3455E (MAX3455E only) only) 13 13 (MAX3454E (MAX3454E only) only) 14 14 TSSOP 11 NAME FUNCTION D+ USB Input/Output. For OE = GND, D+ functions as a USB output, with VP providing the input signal. For OE = VL, D+ functions as a USB input, with VP functioning as a single-ended receiver output. Connect a 1.5kΩ resistor from D+ to VTRM for full-speed (12Mbps) operation (MAX3455E/MAX3456E). Drive ENUM to VL to connect the internal 1.5kΩ resistor (MAX3453E/ MAX3454E) from D+ to VTRM for full-speed (MAX3454E, SPD = VL) operation. Internal Regulator Output. VTRM provides a regulated +3.3V output. Bypass VTRM to GND with a 1µF (min) ceramic capacitor as close to the device as possible. VTRM normally derives power from VBUS. Alternatively, drive VTRM directly with a +3.3V ±10% supply (MAX3454E/MAX3456E). VTRM provides power to internal circuitry and provides the pullup voltage for an external USB pullup resistor (MAX3455E/MAX3456E). Do not use VTRM to power external circuitry. THIN QFN 11 12 12 VTRM 13 13 BD 2 14 1 14 Bus-Detection Output (MAX3453E/MAX3455E). The push-pull BD output asserts low and the device enters sharing mode if VBUS < +3.6V. BD asserts high if VBUS > +4.0V. ENUM Enumerate Function Selection Input (MAX3453E/MAX3454E). Drive ENUM to VL to connect the internal 1.5kΩ resistor between VTRM and D+ or D-, depending on the state of SPD. Drive ENUM to GND to disconnect the internal 1.5kΩ resistor. For SPD = VL, the 1.5kΩ resistor connects to D+. For SPD = GND, the 1.5kΩ resistor connects to D-. For the MAX3453E, the resistor only connects to D+. VBUS USB Power-Supply Input. Connect a +4.0V to +5.5V power supply to VBUS. VBUS provides power to the internal linear regulator. Bypass VBUS to GND with a 0.1µF ceramic capacitor as close to the device as possible. Connect VBUS and VTRM together when powering the MAX3454E/MAX3456E with an external power supply (+3.3V ±10%). _______________________________________________________________________________________ 7 MAX3453E–MAX3456E Pin Description (continued) ±15kV ESD-Protected USB Transceivers MAX3453E–MAX3456E Functional Diagram MAX3453E TO INTERNAL CIRCUITRY BD LDO REGULATOR VTH_VBUS VBUS VTRM VL VP D+ D- VM OE LEVEL TRANSLATOR RCV SUS TO INTERNAL CIRCUITRY 1.5kΩ VTRM ENUM GND 8 _______________________________________________________________________________________ ±15kV ESD-Protected USB Transceivers MAX3454E– MAX3456E TO INTERNAL CIRCUITRY MAX3455E ONLY BD LDO REGULATOR VTH_VBUS VBUS VTRM VL SPD VP D+ D- VM OE LEVEL TRANSLATOR RCV SUS TO INTERNAL CIRCUITRY MAX3454E ONLY 1.5kΩ VTRM SPD ENUM CONTROL LOGIC GND _______________________________________________________________________________________ 9 MAX3453E–MAX3456E Functional Diagram (continued) MAX3453E–MAX3456E ±15kV ESD-Protected USB Transceivers Detailed Description The MAX3453E–MAX3456E USB-compliant transceivers convert single-ended or differential logic-level signals to USB signals, and USB signals to single-ended or differential logic-level signals. The MAX3453E fully complies with full-speed (12Mbps) operation under USB specification 2.0. The MAX3454E–MAX3456E fully comply with USB specification 1.1, and full-speed (12Mbps) and lowspeed (1.5Mbps) operation under USB specification 2.0. The MAX3453E–MAX3456E operate with VL as low as +1.65V, ensuring compatibility with low-voltage ASICs. The MAX3453E–MAX3456E derive power from the USB host (V BUS ) or from a single-cell Li+ battery (MAX3454E/MAX3456E) connected to VBUS or from a +3.3V regulated supply connected to VBUS and VTRM. The MAX3453E–MAX3456E meet the physical layer specifications for logic-level supply voltages (VL) from +1.65V to +3.6V. Integrated ±15kV ESD protection safeguards the D+ and D- USB I/O ports. The MAX3453E/MAX3454E feature an enumerate function providing an internal 1.5kΩ pullup resistor from D+ (MAX3453E/MAX3454E) or D- (MAX3454E only) to VTRM. The enumerate function disconnects the 1.5kΩ pullup resistor, allowing the MAX3453E/MAX3454E to simulate a bus disconnect while powered and connected to the USB cable. The MAX3453E/MAX3455E feature a bus-detect output (BD) that asserts high if VBUS > +4V. BD asserts low if V BUS < +3.6V. The MAX3455E/MAX3456E require external pullup resistors from either D+ or D- to VTRM to utilize the appropriate bus speed. The MAX3456E is pin-for-pin compatible with the Micrel MIC2550A. Applications Information Power-Supply Configurations Normal Operating Mode Connect VL and VBUS to system power supplies (Table 1). Connect VL to a +1.65V to +3.6V supply. Connect VBUS to a +4.0V to +5.5V supply. Alternatively, the MAX3454E/ MAX3456E can derive power from a single Li+ battery. Connect the battery to VBUS. Additionally, the MAX3454E/MAX3456E can derive power from a +3.3V ±10% voltage regulator. Connect VBUS and VTRM to an external +3.3V voltage regulator. VBUS no longer consumes current to power the internal linear regulator in this configuration. Table 1. Power-Supply Configurations VBUS (V) VTRM (V) VL (V) CONFIGURATION NOTES 4.0 to 5.5 3.0 to 3.6 output 1.65 to 3.6 Normal mode — 3.1 to 4.5 3.0 to 3.6 output 1.65 to 3.6 Battery supply MAX3454E/MAX3456E 3.0 to 3.6 3.0 to 3.6 input 1.65 to 3.6 Voltage regulator supply MAX3454E/MAX3456E GND or floating Output 1.65 to 3.6 Sharing mode Table 2 3.0 to 5.5 VBUS GND or floating Disable mode Table 2 Table 2. Disable-Mode and Sharing-Mode Connections INPUTS/OUTPUTS DISABLE MODE VBUS/VTRM • 5V input/3.3V output • 3.3V input/3.3V input (MAX3454E/MAX3456E) • 3.7V input/3.3V output (MAX3454E/MAX3456E) VL SHARING MODE • Floating or connected to GND (MAX3453E/MAX3454E/MAX3456E) • < 3.6V (MAX3453E/MAX3455E) Floating or connected to GND 1.65V to 3.6V input D+ and D- High impedance High impedance VP and VM Invalid* RCV Invalid* Undefined** High impedance High impedance Invalid* Low SPD (MAX3454E–MAX3456E), SUS, OE, ENUM (MAX3453E/MAX3454E) BD (MAX3453E/MAX3455E) High impedance for OE = low High for OE = high *High impedance or low. **High or low. 10 ______________________________________________________________________________________ ±15kV ESD-Protected USB Transceivers Sharing Mode Connect VL to a system power supply and leave VBUS (or VBUS and VTRM) unconnected or connect to GND. D+ and D- enter a tri-state mode, allowing other circuitry to share the USB D+ and D- lines, and VL consumes less than 20µA of supply current. D+ and D- withstand external signals up to +5.5V in sharing mode (Table 2). Device Control OE OE controls the direction of communication. Drive OE low to transfer data from the logic side to the USB side. For OE = low, VP and VM serve as differential driver inputs to the USB transmitter. Drive OE high to transfer data from the USB side to the logic side. For OE = high, VP and VM serve as singleended receiver outputs from the USB inputs (D+ and D-). RCV serves as a differential receiver output, regardless of the state of OE. ENUM (MAX3453E/MAX3454E) The MAX3453E/MAX3454E feature an enumerate function that allows software control of USB enumeration. USB protocol requires a 1.5kΩ pullup resistor to D+ or D- to indicate the transmission speed to the host (see the SPD section). The MAX3453E/MAX3454E provide an internal 1.5kΩ pullup resistor. Disconnect the pullup resistor from the circuit to simulate the removal of a device from the USB. Drive ENUM low to disconnect the internal pullup resistor. Drive ENUM high to connect the internal pullup resistor. The SPD state (MAX3454E only) determines whether the pullup resistor connects to D+ or D-. For ENUM = high, the internal pullup resistor connects to D+ when SPD = VL (full speed) or to Dwhen SPD = GND (low speed). The MAX3453E only supports full-speed operation; therefore, the pullup resistor only connects to D+ or is disconnected. tFR, tLR tFF, tLF VOHD 90% 10% VOLD 90% 10% Table 3a. Transmit Truth Table (OE = 0, SUS = 0) INPUTS OUTPUTS OUTPUT STATE VP VM D+ D- RCV 0 0 0 0 X SE0 0 1 0 1 0 Logic 0 1 0 1 0 1 Logic 1 1 1 1 1 X Undefined X = Undefined. Table 3b. Transmit Truth Table (OE = 0, SUS = 1) INPUTS OUTPUTS OUTPUT STATE VP VM D+ D- RCV 0 0 0 0 0 SE0 0 1 0 1 0 Logic 0 1 0 1 0 0 Logic 1 1 1 1 1 0 Undefined Table 4a. Receive Truth Table (OE = 1 and SUS = 0) INPUTS OUTPUTS OUTPUT STATE D+ D- VP VM RCV 0 0 0 0 X SE0 0 1 0 1 0 Logic 0 1 0 1 0 1 Logic 1 1 1 1 1 X Undefined X = Undefined. Table 4b. Receive Truth Table (OE = 1 and SUS = 1) INPUTS OUTPUTS OUTPUT STATE D+ D- VP VM RCV 0 0 0 0 0 SE0 0 1 0 1 0 Logic 0 1 0 1 0 0 Logic 1 1 1 1 1 0 Undefined Figure 1. Rise and Fall Times ______________________________________________________________________________________ 11 MAX3453E–MAX3456E Disable Mode Connect VBUS to a system power supply and leave VL unconnected or connect to GND. D+ and D- enter a tristate mode and VBUS (or VBUS and VTRM) consumes less than 20µA of supply current. D+ and D- withstand external signals up to +5.5V in disable mode (Table 2). MAX3453E–MAX3456E ±15kV ESD-Protected USB Transceivers SPD (MAX3454E/MAX3455E/MAX3456E) SPD sets the transceiver speed. Connect SPD to GND to select the low-speed data rate (1.5Mbps). Connect SPD to VL to select the full-speed data rate (12Mbps). The MAX3454E provides an internal pullup resistor for selecting the bus speed. The MAX3455E and MAX3456E require an external pullup resistor to D+ or D- to set the bus speed. Connect the 1.5kΩ resistor between D+ and VTRM to set the full-speed (12Mbps) data rate, or connect the 1.5kΩ resistor between D- and VTRM to set the low-speed (1.5Mbps) data rate. VP AND VM RISE/FALL TIMES < 4ns VM VP tPLH_DRV tPHL_DRV D- SUS The SUS state determines whether the MAX3453E– MAX3456E operate in normal mode or in suspend mode. Connect SUS to GND to enable normal operation. Drive SUS high to enable suspend mode. RCV asserts low and VP and VM remain active in suspend mode (Tables 3 and 4). Supply current decreases in suspend mode (see the Electrical Characteristics). BD (MAX3453E/MAX3455E) The push-pull bus detect (BD) output monitors VBUS and asserts high if V BUS is greater than +4.0V. BD asserts low if V BUS is less than +3.6V and the MAX3453E/MAX3455E enters sharing mode (Table 2). VTRM An internal linear regulator generates the VTRM voltage (+3.3V, typ). VTRM derives power from VBUS (see the Power-Supply Configurations section). VTRM powers the internal portions of the USB circuitry and provides the pullup voltage for an external USB pullup resistor (MAX3455E/MAX3456E). Bypass VTRM to GND with a 1µF ceramic capacitor as close to the device as possible. Do not use VTRM to provide power to external circuitry. D+ and DD+ and D- serve as bidirectional bus connections and are ESD protected to ±15kV (Human Body Model). For OE = low, D+ and D- serve as transmitter outputs. For OE = high, D+ and D- serve as receiver inputs. VBUS For most applications, VBUS connects to the VBUS terminal on the USB connector (see the Power-Supply Configurations section). VBUS can also connect to an external supply as low as +3.1V (MAX3454E/MAX3456E). Drive VBUS low to enable sharing mode. Bypass VBUS to GND with a 0.1µF ceramic capacitor as close to the device as possible. 12 VCRS_F , VCRS_L D+ Figure 2. Timing of VP and VM to D+ and D- External Components External Resistors Proper USB operation requires two external resistors, each 27Ω ±1%, 1/8W (or greater). Install one resistor in series between D+ of the MAX3453E–MAX3456E and D+ on the USB connector. Install the other resistor in series between D- of the MAX3453E–MAX3456E and Don the USB connector (see Typical Operating Circuit). The MAX3455E/MAX3456E require an external 1.5kΩ pullup resistor between VTRM and D+ or D- to set the bus speed. External Capacitors The MAX3453E–MAX3456E require three external capacitors for proper operation. Bypass VL to GND with a 0.1µF ceramic capacitor. Bypass VBUS to GND with a 0.1µF ceramic capacitor. Bypass VTRM to GND with a 1µF (min) ceramic capacitor. Install all capacitors as close to the device as possible. Data Transfer Transmitting Data to the USB The MAX3453E–MAX3456E transmit data to the USB differentially on D+ and D-. VP and VM serve as differential input signals to the driver (Tables 3a and 3b). Receiving Data from the USB To receive data from the USB, drive OE high and SUS low. Differential data received by D+ and D- appears as a differential logic signal at RCV. Single-ended receivers on D+ and D- drive VP and VM, respectively (Tables 4a and 4b). ______________________________________________________________________________________ ±15kV ESD-Protected USB Transceivers 560Ω 150Ω VL +3V DUT DUT VP/VM MAX3453E–MAX3456E VL +3V D+/D- VP/VM D+/D560Ω 150Ω OE OE VP/VM CONNECTED TO GND, D+/D- CONNECTED TO PULLUP D+/D- CONNECTED TO GND, VP/VM CONNECTED TO PULLUP D+/DVP/VM tPZL_DRV tPLZ_DRV tPLZ_SE VP/VM CONNECTED TO VL, D+/D- CONNECTED TO PULLDOWN OE D+/D- tPZL_SE D+/D- CONNECTED TO +3V, VP/VM CONNECTED TO PULLDOWN OE VP/VM tPHZ_DRV tPZH_DRV tPHZ_SE Figure 3. Enable and Disable Timing, Driver tPZH_SE Figure 5. Enable and Disable Timing, Receiver INPUT RISE/FALL TIME < 4ns +3V TEST POINT MAX3453E– MAX3456E D+/D- RCV, VM, AND VP 0V CL (a) LOAD FOR RCV, VM, AND VP MAX3453E– MAX3456E VL tPLH_RCV, tPLH_SE 27Ω TEST POINT D+ AND DCL RCV, VM, AND VP tPHL_RCV, tPHL_SE Figure 4. Timing of D+ and D- to RCV, VM, and VP 15kΩ (b) LOAD FOR D+/D- Figure 6. Test Circuits ______________________________________________________________________________________ 13 MAX3453E–MAX3456E ±15kV ESD-Protected USB Transceivers ESD Protection D+ and D- possess extra protection against static electricity to protect the devices up to ±15kV. The ESD structures withstand high ESD in all operating modes: normal operation, suspend mode, and powered down. D+ and D- provide protection to the following limits: • ±15kV using the Human Body Model • ±8kV using the Contact Discharge method specified in IEC 1000-4-2 RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF RD 1.5kΩ DISCHARGE RESISTANCE DEVICE UNDER TEST STORAGE CAPACITOR 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. Figure 7. Human Body ESD Test Models Human Body Model Figure 7 shows the Human Body Model and Figure 8 shows the current waveform generated when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which then discharges into the test device through a 1.5kΩ resistor. IP 100% 90% PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES 36.8% 10% 0 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 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, due to lower series resistance. Hence, the ESD withstand voltage measured to IEC 1000-4-2 generally is lower than that measured using the Human Body Model. Figure 9 shows the IEC 1000-4-2 model. The Contact Discharge method connects the probe to the device before the probe is charged. Ir 0 tRL TIME tDL CURRENT WAVEFORM Figure 8. Human Body Model Current Waveform RC 50Ω to 100Ω CHARGE-CURRENTLIMIT RESISTOR RD 330Ω DISCHARGE RESISTANCE Machine Model The Machine Model for ESD tests all connections using a 200pF storage capacitor and zero discharge resistance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just inputs and outputs. After PC board assembly, the Machine Model is less relevant to I/O ports. HIGHVOLTAGE DC SOURCE Cs 150pF STORAGE CAPACITOR Figure 9. IEC 1000-4-2 ESD Test Model Chip Information TRANSISTOR COUNT: 873 PROCESS: BiCMOS 14 ______________________________________________________________________________________ DEVICE UNDER TEST ±15kV ESD-Protected USB Transceivers +1.65V TO +3.6V 0.1µF 0.1µF PC VL(I/O) BD* VL USB POWER VBUS 27Ω 1% D+ D+ VP 27Ω 1% VM ASIC RCV MAX3453E MAX3454E D- D- GND GND USB CABLE ENUM 15kΩ 15kΩ SUS VTRM SPD** 1µF OE GND *MAX3453E ONLY. **MAX3454E ONLY. +1.65V TO +3.6V 0.1µF 0.1µF PC VL(I/O) VL VP VBUS VM VTRM USB POWER 1µF RCV ASIC BD** MAX3455E MAX3456E* 1.5kΩ*** 27Ω 1% D+ D+ SUS 27Ω 1% D- SPD OE GND D- GND GND USB CABLE 15kΩ 15kΩ *PIN COMPATIBLE WITH MICREL MIC2550A. **MAX3455E ONLY. ***CONNECT TO D+ FOR FULL-SPEED OPERATION. CONNECT TO D- FOR LOW-SPEED OPERATION. ______________________________________________________________________________________ 15 MAX3453E–MAX3456E Typical Operating Circuits ±15kV ESD-Protected USB Transceivers MAX3453E–MAX3456E Pin Configurations TOP VIEW VL 1 14 VBUS ENUM 2 13 BD SPD 2 RCV 3 12 VTRM RCV 3 VP 4 11 D+ VP 4 VM 5 10 D- VM 5 10 D- N.C. 6 9 OE N.C. 6 9 OE GND 7 8 SUS GND 7 8 SUS MAX3453E 14 VBUS VL 1 13 N.C. (ENUM*) (BD**) MAX3454E MAX3455E MAX3456E TSSOP 2 VP 3 N.C. VL VBUS BD N.C. VL VBUS N.C. (ENUM*) (BD**) 16 15 14 13 16 15 14 13 MAX3453E 12 VTRM SPD 1 11 D+ RCV 2 10 D- VP 3 12 VTRM MAX3454E MAX3455E MAX3456E 10 D- ***EXPOSED PADDLE ***EXPOSED PADDLE VM 4 9 6 7 8 5 N.C. N.C. 5 OE N.C. 9 SUS 4 GND VM 11 D+ 3mm x 3mm THIN QFN 6 7 8 N.C. RCV TSSOP SUS 1 11 D+ GND ENUM 12 VTRM OE 3mm x 3mm THIN QFN *MAX3454E ONLY. **MAX3455E ONLY. ***CONNECT EXPOSED PADDLE TO GND OR LEAVE FLOATING. 16 ______________________________________________________________________________________ ±15kV ESD-Protected USB Transceivers 12x16L QFN THIN.EPS D2 0.10 M C A B b D D2/2 D/2 E/2 E2/2 CL -A- (NE - 1) X e E E2 L -B- k e CL (ND - 1) X e CL CL 0.10 C 0.08 C A A2 A1 L L e e PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE 12 & 16L, QFN THIN, 3x3x0.8 mm APPROVAL DOCUMENT CONTROL NO. 21-0136 REV. C 1 2 ______________________________________________________________________________________ 17 MAX3453E–MAX3456E 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.) MAX3453E–MAX3456E ±15kV ESD-Protected USB Transceivers 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.) EXPOSED PAD VARIATIONS NOTES: 1. DIMENSIONING & TOLERANCING CONFORM TO ASME Y14.5M-1994. 2. ALL DIMENSIONS ARE IN MILLIMETERS. ANGLES ARE IN DEGREES. 3. N IS THE TOTAL NUMBER OF TERMINALS. 4. THE TERMINAL #1 IDENTIFIER AND TERMINAL NUMBERING CONVENTION SHALL CONFORM TO JESD 95-1 SPP-012. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL, BUT MUST BE LOCATED WITHIN THE ZONE INDICATED. THE TERMINAL #1 IDENTIFIER MAY BE EITHER A MOLD OR MARKED FEATURE. 5. DIMENSION b APPLIES TO METALLIZED TERMINAL AND IS MEASURED BETWEEN 0.20 mm AND 0.25 mm FROM TERMINAL TIP. 6. ND AND NE REFER TO THE NUMBER OF TERMINALS ON EACH D AND E SIDE RESPECTIVELY. 7. DEPOPULATION IS POSSIBLE IN A SYMMETRICAL FASHION. 8. COPLANARITY APPLIES TO THE EXPOSED HEAT SINK SLUG AS WELL AS THE TERMINALS. 9. DRAWING CONFORMS TO JEDEC MO220 REVISION C. PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE 12 & 16L, QFN THIN, 3x3x0.8 mm APPROVAL DOCUMENT CONTROL NO. 21-0136 18 ______________________________________________________________________________________ REV. C 2 2 ±15kV ESD-Protected USB Transceivers TSSOP4.40mm.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 ____________________ 19 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX3453E–MAX3456E 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.)