Datasheet

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General Description

The MAX3346E bidirectional transceiver converts logic-

level signals to USB signals, and USB signals to logic-

level signals. The MAX3346E includes the 1.5kΩ USB

pullup resistor internally, and supports both full-speed

(12Mbps) and low-speed (1.5Mbps) USB operation.

The device has built-in ±15kV ESD protection circuitry

to guard the USB I/O pins, D+ and D-.

The MAX3346E operates with V

voltages as low as

1.65V, ensuring compatibility with low-voltage ASICs.

The device features a logic-selectable suspend mode

that lowers current draw to less than 40µA. The

MAX3346E has an enumerate function that allows

devices to logically disconnect while plugged in. The

MAX3346E is fully compliant with USB specification 1.1,

and the full-speed and low-speed operation under USB

specification 2.0.

The MAX3346E is available in the miniature 4 x 4 chip-

scale package (UCSP

), as well as the small 14-pin

TSSOP, and is rated for the -40°C to +85°C extended

temperature range.

Applications

Cell Phones

PC Peripherals

Data Cradles

PDAs

MP3 Players

Features

♦ ±15kV ESD Protection on D+ and D-

♦ Internal Linear Regulator Allows Direct Powering

from the USB Cable

♦ Internal 1.5kΩ Pullup Resistor for Low/Full-Speed

Operation

♦ Supports Low-Speed and Full-Speed USB

Communications

♦ Complies with USB Specification Revision 1.1 and

2.0 (Low Speed and Full Speed)

♦ Three-State Outputs

♦ Enumerate Input—Allows USB Connection

through Software

♦ No Power-Supply Sequencing Required

♦ Operates with V

of 1.65V to 3.6V, Ensuring

Compatibility with Low-Voltage ASICs

♦ Available in Miniature Chip-Scale Package

MAX3346E

±15kV ESD-Protected USB Transceiver

in UCSP

________________________________________________________________ Maxim Integrated Products 1

VTRM

D+

D-VM

MODE

RCV

TOP VIEW

MAX3346E

GND

SPEEDSUSP

ENUM

TSSOP

BOTTOM VIEW

UCSP

GND

VTRM

D+

D-

SPEED

MODE

RCV

SUSP

ENUM

MAX3346E

1234

Pin Configurations

Ordering Information

19-3172; Rev 0; 2/04

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.

PART

TEMP RANGE

PIN-PACKAGE

MAX3346EEUD

-40°C to +85°C

14 TSSOP

MAX3346EEBE-T

-40°C to +85°C

4 x 4 UCSP

UCSP is trademark of Maxim Integrated Products, Inc.

Summary of content (17 pages)

PAGE 1
9-3172; Rev 0; 2/04 ±15kV ESD-Protected USB Transceiver in UCSP Features The MAX3346E bidirectional transceiver converts logiclevel signals to USB signals, and USB signals to logiclevel signals. The MAX3346E includes the 1.5kΩ USB pullup resistor internally, and supports both full-speed (12Mbps) and low-speed (1.5Mbps) USB operation. The device has built-in ±15kV ESD protection circuitry to guard the USB I/O pins, D+ and D-. The MAX3346E operates with VL voltages as low as 1.
PAGE 2
MAX3346E ±15kV ESD-Protected USB Transceiver in UCSP ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) Supply Voltage (VCC) ...............................................-0.3V to +6V Output of Internal Regulator (VTRM) ..........-0.3V to (VCC + 0.3V) Input Voltage (D+, D-) ..............................................-0.3V to +6V System Supply Voltage (VL) .....................................-0.3V to +6V RCV, SUSP, VM, VP, MODE, OE, SPEED, ENUM ..........................
PAGE 3
±15kV ESD-Protected USB Transceiver in UCSP (VCC = +4V to +5.5V, GND = 0, VTRM = +3.0V to +3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VL = +2.5V, TA = +25°C.
PAGE 4
MAX3346E ±15kV ESD-Protected USB Transceiver in UCSP TIMING CHARACTERISTICS (continued) (VCC = +4V to +5.5V, GND = 0, VTRM = +3.0V to 3.6V, VL = +1.65V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VL = +2.5V, TA = +25°C.
PAGE 5
±15kV ESD-Protected USB Transceiver in UCSP 12 11 TA = +25°C 10 9 TA = +85°C 14 TA = -40°C 8 1.8 13 1.6 12 1.4 TA = +25°C 11 1.0 9 0.8 TA = -40°C 2.1 2.4 2.7 3.0 3.3 3.6 TA = +85°C 0.4 4.00 4.25 VL (V) 4.50 4.75 5.00 5.25 4.00 5.50 4.25 4.50 4.75 5.00 5.25 5.50 VCC (V) VCC (V) SKEW VS. VCC (MODE 0, LOW SPEED) OE, VP, VM TIMING MAX3346E toc05 1.0 MAX3346E toc04 0.9 0.8 0.7 A TA = +85°C 0.6 0 TA = +25°C 0.5 B 0.4 0 0.3 TA = -40°C 0.2 C 0 0.
PAGE 6
MAX3346E ±15kV ESD-Protected USB Transceiver in UCSP Typical Operating Characteristics (continued) (VCC = +5V, VL = +3.3V, TA = +25°C, unless otherwise noted.) RISE- AND FALL-TIME MATCHING (LOW SPEED) SUSPEND RESPONSE RISE- AND FALL-TIME MATCHING (FULL SPEED) MAX3346E toc09 MAX3346E toc08 MAX3346E toc10 f = 750kHz f = 6MHz A 0 D+ D+ D- D- 0 B 0 0 100ns/div 100ns/div 20ns/div A: SUSP, 2V/div B: RCV, 2V/div Pin Description PIN 6 NAME INPUT/ OUTPUT D2 RCV Output Receiver Output.
PAGE 7
±15kV ESD-Protected USB Transceiver in UCSP PIN TSSOP UCSP 7 B2 NAME INPUT/ OUTPUT SUSP Input Suspend Input. Drive SUSP low for normal operation. Force SUSP high for lowpower state. In low-power state RCV is low, D+/D- are high impedance if OE is floating, and VP/VM are active outputs. FUNCTION 8 A2 SPEED Input USB Transmission Speed Select Input. If SPEED is forced high, full speed (12Mbps) is selected and the internal 1.5kΩ pullup resistor is connected to D+.
PAGE 8
MAX3346E ±15kV ESD-Protected USB Transceiver in UCSP Device Control OE Applications Information Power-Supply Configurations Normal Operating Mode Connect VL and VCC to system power supplies (Table 1). Connect VL to a +1.65V to +3.6V supply. Connect V CC to a +4.0V to +5.5V supply. Alternatively, the MAX3346E can derive power from a single Li+ battery. Connect the battery to V CC . VTRM remains above +3.0V for VCC as low as +3.1V. Additionally, the MAX3346E can derive power from a 3.
PAGE 9
±15kV ESD-Protected USB Transceiver in UCSP VL VL VL/2 OE VL/2 VPO 0V 0V tPHLO tPLHO tPZV tPVZ VTRM D+ 0V D- VOH - 0.3V VP/VM VOL + 0.3V Figure 2. Mode 0 Timing Figure 1a. Enable and Disable Timing, Receiver VP VL VL OE VL/2 VL/2 0V 0V tPZD tPDZ tPHL1 VOHD - 0.3V D+/D- VL/2 VL/2 VM 0V VOLD + 0.3V Figure 1b. Enable and Disable Timing, Transmitter SUSP SUSP, or suspend, is a control input. When SUSP is forced high the MAX3346E enters a low-power state.
PAGE 10
MAX3346E ±15kV ESD-Protected USB Transceiver in UCSP TEST POINT MAX3346E MAX3346E TEST POINT 200Ω VM or VP or RCV VP or VM + 25pF - GND or VCC (b) LOAD FOR VP, VM AND RCV. (a) LOAD FOR ENABLE AND DISABLE TIME, VP/VM. MAX3346E 3.3V D+ or D- 25pF TEST POINT 23.7Ω MAX3346E TEST POINT 200Ω 23.7Ω D+ or D- 1.5kΩ CL 15kΩ (c) LOAD FOR D+/D-. + 50pF - (d) LOAD FOR ENABLE AND DISABLE TIME, D+/D-. Figure 4.
PAGE 11
±15kV ESD-Protected USB Transceiver in UCSP MAX3346E Table 3a. Truth Table, Transmit (MODE = 0) OE = 0 (TRANSMIT) INPUT OUTPUT RESULT VP VM D+ D- RCV 0 0 0 1 0 0 1 0 0 RCV* SE0 1 0 1 0 1 Logic 1 1 1 0 0 X SE0 Logic 0 *RCV denotes the signal level on output RCV just before SE0 state occurs. This level is stable during the SE0 period. Table 3b.
PAGE 12
MAX3346E ±15kV ESD-Protected USB Transceiver in UCSP External Components External Resistors Two external resistors are required for USB connection, each of them from 23.7Ω ±1% to 27.4Ω ±1%, 1/2W (or greater). Place one resistor in series between D+ of the MAX3346E and D+ of the USB connector. Place the other resistor in series between D- of the MAX3346E and D- of the USB connector. The Typical Operating Circuit shows these connections.
PAGE 13
±15kV ESD-Protected USB Transceiver in UCSP 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. 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 occurs with handling and assembly during manufacturing.
PAGE 14
±15kV ESD-Protected USB Transceiver in UCSP MAX3346E Typical Operating Circuit SYSTEM POWER 1.0µF CERAMIC 0.1µF CERAMIC ASIC USB CABLE PC VCC USB POWER 23.7Ω ±1% VL D+ VP MAX3346E D+ 23.7Ω ±1% VM D- RCV D- ENUM GND OE SUSP GND 15kΩ SPEED MODE VTRM 1.
PAGE 15
±15kV ESD-Protected USB Transceiver in UCSP VCC LINEAR REGULATOR MAX3346E VTRM VL 1.
PAGE 16
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.) TSSOP4.40mm.
PAGE 17
±15kV ESD-Protected USB Transceiver in UCSP 16L,UCSP.EPS PACKAGE OUTLINE, 4x4 UCSP 21-0101 H 1 1 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.