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General Description

The MAX3353E I

C-compatible USB On-the-Go (OTG)

regulated charge pump with switchable pullup/pull-

down resistors allows peripherals and mobile devices

such as PDAs, cellular phones, and digital cameras to

be interconnected without a host PC.

The MAX3353E enables a system with an integrated

USB dual-role transceiver to function as a USB OTG

dual-role device. The charge pump in the MAX3353E

supplies V

BUS

power and signaling that is required by

the transceiver as defined in On-the-Go Supplement:

USB 2.0, Revision 1.0. The MAX3353E provides the

switchable pullup and pulldown resistors on D+ and D-

required for a dual-role device.

The MAX3353E integrates a regulated charge pump,

switchable pullup/pulldown resistors, and an I

C-com-

patible 2-wire serial interface. The device provides a

detector to monitor ID status and operates with logic

supply voltages (V

) between +1.65V and V

and

charge-pump supply voltages (V

) from +2.6V to

+5.5V. The charge pump supplies an OTG-compatible

output on V

BUS

while sourcing 8mA output current.

The MAX3353E enables USB OTG communication

between digital logic parts that cannot supply or tolerate

the +5V V

BUS

levels that USB OTG requires. By control-

ling and measuring V

BUS

using internal comparators,

this device supports USB OTG session request protocol

(SRP) and host negotiation protocol (HNP).

The MAX3353E has built-in ±15kV ESD protection circuitry

to guard V

BUS

, ID_IN, D+, and D-. The MAX3353E is

available in a 5 x 4 chip-scale package (UCSP™) and

16-pin TSSOP package.

Applications

Mobile Phones

PDAs

Digital Cameras

MP3 Players

Photo Printers

Features

♦ Ideal for Enabling USB Dual-Role Components for

USB OTG Protocol

♦ Charge Pump for V

BUS

Signaling and Operation

Down to +2.6V

♦ Level Translators Allow Low-Voltage System

Interface

♦ Internal V

BUS

Comparators and ID Detector

♦ Internal Switchable Pullup and Pulldown

Resistors for Host/Peripheral Functionality

♦ I

C-Compatible Bus Interface with Command and

Status Registers

♦ Interrupt Features

♦ ±15kV ESD Protection on ID_IN, V

BUS

, D+, and D-

♦ Supports SRP and HNP

♦ Available in 5 x 4 UCSP and 16-Pin TSSOP

MAX3353E

USB On-the-Go Charge Pump with Switchable

Pullup/Pulldown Resistors

________________________________________________________________ Maxim Integrated Products 1

MAX3353E

PULLUP/DOWN

RESISTORS

CURRENT

GENERATOR

CHARGE

PUMP

C+ C-

BUS

COMPARATORS

C INTERFACE AND CONTROL LOGIC

ID DETECTOR

ID_OUT

SCL

SDA

ADD

INT

BUS

ID_IN

D+

D-

TRM

SE0

DRIVER

200kΩ

±15kV

ESD

PROTECTION

110kΩ

Functional Diagram

Ordering Information

19-2845; Rev 1; 10/03

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.

UCSP is a trademark of Maxim Integrated Products, Inc.

PART

TEMP RANGE

PIN-

PACKAGE

PKG

CODE

MAX3353EEUE

-40°C to +85°C

16 TSSOP

—

MAX3353EEBP-T

-40°C to +85°C

5 x 4 UCSP

B20-4

Pin Configurations appear at end of data sheet.

Typical Applications Circuit appears at end of data sheet.

Summary of content (21 pages)

PAGE 1
9-2845; Rev 1; 10/03 USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors The MAX3353E USB On-the-Go (OTG) regulated charge pump with switchable pullup/pulldown resistors allows peripherals and mobile devices such as PDAs, cellular phones, and digital cameras to be interconnected without a host PC. The MAX3353E enables a system with an integrated USB dual-role transceiver to function as a USB OTG dual-role device.
PAGE 2
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) VCC, VL, VTRM ..........................................................-0.3V to +6V D+, D-, ID_IN (Note 1)..............................................-0.3V to +6V VBUS (Notes 1, 2) .....................................................-0.3V to +6V C+..................................................................(VCC - 0.3V) to +6V C-...................................
PAGE 3
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors (VCC = +2.6V to +5.5V, VL = +1.65V to VCC, VTRM = +3V to +3.6V, CFLYING = 0.1µF, VCC decoupled with 1µF capacitor to ground; VTRM and VL decoupled with 0.1µF capacitor to ground; CVBUS = 1µF (min), TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +4V, VL = +1.8V, VTRM = +3.3V, and TA = +25°C.
PAGE 4
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors ELECTRICAL CHARACTERISTICS (continued) (VCC = +2.6V to +5.5V, VL = +1.65V to VCC, VTRM = +3V to +3.6V, CFLYING = 0.1µF, VCC decoupled with 1µF capacitor to ground; VTRM and VL decoupled with 0.1µF capacitor to ground; CVBUS = 1µF (min), TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +4V, VL = +1.8V, VTRM = +3.3V, and TA = +25°C.
PAGE 5
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors (VCC = +2.6V to +5.5V, VL = +1.65V to VCC, VTRM = +3V to +3.6V, CFLYING = 0.1µF, VCC decoupled with 1µF capacitor to ground. VTRM and VL decoupled with 0.1µF capacitor to ground. CVBUS = 1µF (min), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C, VCC = +4V, VL = +1.8V, VTRM = +3.3V.
PAGE 6
Typical Operating Characteristics (VCC = +3V, VL = +2.5V, CFLYING = 0.1µF, CVBUS = 1µF (ESRCVBUS = 0.1Ω), TA = +25°C.) VBUS OUTPUT VOLTAGE vs. VBUS OUTPUT CURRENT 80 60 40 MAX3353 toc02 VCC = 4.2V VCC = 3.3V 5.00 4.90 VBUS OUTPUT VOLTAGE (V) VBUS OUTPUT VOLTAGE (V) VCC = 2.6V VCC = 3.3V VCC = 4.2V 100 5.25 MAX3353 toc01 120 VBUS OUTPUT VOLTAGE vs. INPUT VOLTAGE 4.75 VCC = 2.6V 4.50 4.25 20 0 4.00 0 10 20 30 40 50 MAX3353 toc03 INPUT CURRENT vs. OUTPUT CURRENT INPUT CURRENT (mA) 4.
PAGE 7
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors PIN NAME FUNCTION C5 VCC Power-Supply Input. VCC input range is +2.6V to +5.5V. Bypass VCC to GND with a 1µF capacitor. 2 D5 VL 3 D4 SDA Serial Data Input/Output. I2C bus serial data input/open-drain output can be driven above VL. 4 C3 ADD Address Select Input. Address selection for the I2C-compatible interface. ADD has an internal 110kΩ pulldown resistor (see the 2-Wire I2C Compatible Serial Interface section for details).
PAGE 8
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors VBUS Level-Detection Comparators VBUS Comparators drive status register bits 0, 1, and 2 to indicate these important USB OTG VBUS voltage levels: • VBUS is valid (VBUS > 4.6V) • A USB session is valid (VBUS > 1.4V) • A USB session is ended (VBUS < 0.5V) The 4.6V comparator sets bit 0 in status register VBUS_VALID to 1 if VBUS > 4.6V.
PAGE 9
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors Autoconnect and Autoresponse USB OTG defines the HNP, where the default host (A Device) can pass the host responsibilities off to the default peripheral (B Device). This protocol can be handled entirely by the firmware and controlling logic that drives the OTG transceiver. The MAX3353E has the option to automatically perform some of the required signaling for some of the timing-critical events in the HNP process.
PAGE 10
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors The MAX3353E also has a special feature that allows it to control the timing of the VBUS pulse. itself. Firmware initiates the self-timed VBUS pulse by setting the VBUS_CHG1 control bit to 1. Since an OTG device could be plugged into a PC, the VBUS pulse must be particularly well controlled to prevent damage to a PC host. For this reason, VBUS pulsing is done by turning on and off a current source.
PAGE 11
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors SDA Slave Address SCL S P START CONDITION STOP CONDITION Figure 5. Start and Stop Conditions bidirectional communication between master(s) and slave(s). A master (typically a microcontroller) initiates all data transfers to and from the MAX3353E and generates the SCL clock that synchronizes the data transfer (Figure 4). The MAX3353E SDA line operates as both an input and an open-drain output. A pullup resistor (4.
PAGE 12
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors 1 0 SDA START 1 1 0 0 R/W A0 MSB ACK LSB SCL Figure 6. Slave Address START CONDITION SDA CLOCK PULSE FOR ACKNOWLEDGMENT SCL 1 2 8 9 SDA BY TRANSMITTER SCL DATA LINES STABLE, CHANGE OF DATA VALID DATA ALLOWED SDA BY RECEIVER Figure 8. Acknowledge Figure 7.
PAGE 13
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors ADD PIN ADDRESS BITS A6 A5 A4 A3 A2 A1 A0 Float or GND 0 1 0 1 1 0 0 VL 0 1 0 1 1 0 1 Interrupt Registers (14h, 15h, 16h) There are three interrupt registers. Interrupt mask register is a read/write register used to enable interrupts and read status of interrupts. Interrupt edge register is a read/write register for setting and determining interrupts for positive and negative edges.
PAGE 14
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors interrupt edge, and interrupt latch address maps. Bit configuration is shown in Tables 9, 10, and 11. Manufacturer and ID Register Address Map The manufacturer and ID registers are read-only registers (Table 12). External Capacitors Five external capacitors are recommended for proper operation. Bypass VL and VTRM to GND with a 0.1µF ceramic capacitor. Bypass VBUS and VCC to GND with a 1µF low-ESR ceramic capacitor.
PAGE 15
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors MAX3353E Table 7. Status Register (13h) BIT NUMBER SYMBOL 0 VBUS_VALID Device A VBUS valid comparator, threshold = 4.55V: 0 = VBUS lower than threshold 1 = VBUS higher than threshold 1 SESSION_ VALID Session-valid comparator, threshold = 1.
PAGE 16
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors Table 10. Interrupt Edge Register (15h) BIT NUMBER 0 SYMBOL VBUS_ VALID_ED Table 11.
PAGE 17
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors ±15kV ESD Protection To protect the MAX3353E against ESD, D+, D-, ID_IN, and VBUS, have extra protection against static electricity to protect the device up to ±15kV. The ESD structures withstand high ESD in all states—normal operation, shutdown, and powered down. In order for the 15kV ESD structures to work correctly, a 1µF or greater capacitor must be connected from VBUS to GND.
PAGE 18
MAX3353E USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors RC 1MΩ CHARGE-CURRENTLIMIT RESISTOR RD 1.5kΩ IP 100% 90% DISCHARGE RESISTANCE Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES HIGHVOLTAGE DC SOURCE Cs 100pF STORAGE CAPACITOR DEVICE UNDER TEST 36.8% 10% 0 0 Figure 11. Human Body ESD Test Models CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF Figure 12.
PAGE 19
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors Typical Applications Circuit TOP VIEW VL VCC 1 16 VBUS VL 2 15 C+ SDA 3 14 C- 0.1μF ADD 4 4.7kΩ 13 GND MAX3353EEUE SCL 5 12 N.C. INT 6 11 ID_IN ID_OUT 7 9 D+ ID_IN GND D- C VTRM D VTRM VCC C1+ SCL C1- CFLYING 0.1μF CVBUS 1μF MAX3353E INT C- 0.1μF SDA μP C+ D- B 0.1μF VBUS D- TSSOP A VTRM 4.
PAGE 20
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.) 5x4 UCSP.
PAGE 21
USB On-the-Go Charge Pump with Switchable Pullup/Pulldown Resistors TSSOP4.40mm.EPS PACKAGE OUTLINE, TSSOP 4.40mm BODY 21-0066 I 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.