MAX4670 19-3798 Rev 0 09/06 Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch General Description Features The MAX4670 is an integrated T1/E1/J1 analog protec- Single +3.3V Supply Voltage tion switch for 1+1 and N+1 line-card redundancy Quad-DPDT/Octal-SPDT Switches Support applications. It protects two T1/E1/J1 ports by combin- Two T1/E1/J1 Ports ing eight SPDT switches in a single package. The switch is optimized for high-return loss and pulse-tem- Low R ON plate performance in T1/E1/J1 long-haul and short-haul 0.7 (typ) in Transmit Path 5 (typ) in applications. The part offers built-in chip-side surge Receive Path protection capability for short-haul intrabuilding appli- cations. Low C /C ON OFF 60pF/40pF (typ) in Transmit Path The MAX4670 replaces two diode arrays or two tran- 24pF/12pF (typ) in Receive Path sient voltage suppressors (TVSs) and four dual-SPDT relays, significantly reducing board space and simplify- Chip Surge Protection ing PC board routing. The MAX4670 pinout is targeted IEC 61000-4-5 (8s to 20s Surge) for T1/E1/J1 applications, resulting in a simplified layout Class 2 (1kV) when interfacing with standard line transformers and -70dB (typ) Crosstalk/Off-Isolation (3MHz) line interface units (LIUs). Small, 32-Pin TQFN Package The MAX4670 has four 1.0 (max) on-resistance switch- es with 60pF/40pF on-/off-capacitances for interfacing to the LIU transmitter outputs. The MAX4670 also includes four 10 (max) on-resistance switches with low Ordering Information 24pF/12pF on-/off-capacitances for interfacing to the LIU receiver inputs. Four logic inputs control the receive/ PIN- SURGE PKG PART* transmit pairs, in addition to a SWITCH input that con- PACKAGE PROTECTION CODE nects all switches to the systems protection bus. 32 TQFN MAX4670ETJ YES T3255-4 The MAX4670 operates from a single +2.7V to +3.6V (5mm x 5mm) supply and is available in 32-pin thermally enhanced *This part operates at a -40C to +85C temperature range. TQFN package. The MAX4670 is specified over the -40C to +85C operating temperature range. Applications Pin Configuration Optical Multiplexers (ADMs, M13s, etc.) TOP VIEW Edge Routers Multiservice Switches NC7 Base Station Controllers (Wireless Infrastructure NO2 25 16 Equipment) NC2 26 15 NO7 Media Gateways (VoIP) NO1 27 14 NC8 NC1 NO8 28 13 MAX4670 COM1 COM8 29 12 COM7 COM2 30 11 Functional Diagram/Truth Table appears at end of data sheet. INA 31 10 IND *EP V+ V+ 32 9 *NOTE: EXPOSED PADDLE CONNECTED TO GND TQFN Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. INB 1 24 NC3 COM3 2 23 NO3 22 NC4 COM4 3 GND 4 21 NO4 INC 5 20 NC5 COM5 6 19 NO5 COM6 18 NC6 7 SWITCH 8 17 NO6Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Peak Surge Currents V+, IN , SWITCH......................................................-0.3V to +4V Poised at 8s ..................................................................21.4A COM , NO , NC (Note 1) ...........................-0.3V to (V+ + 0.3V) Poised at 20s ................................................................11.9A Continuous Current Continuous Power Dissipation (T = +70C) A NO , NC , COM (Tx interface)..................................150mA 32-Pin TQFN (derate 21.3mW/C above +70C) .......1702mW NO , NC , COM (Rx interface) .................................100mA 38-Pin TSSOP (derate 13.7mW/C above +70C) .....1096mW Peak Currents Operating Temperature Range ...........................-40C to +85C NO , NC , COM (Tx interface) Storage Temperature Range .............................-65C to +150C (pulsed at 1ms, 10% duty cycle) ................................300mA Junction Temperature......................................................+150C NO , NC , COM (Rx interface) Lead Temperature (soldering, 10s) .................................+300C (pulsed at 1ms, 10% duty cycle) ................................200mA Note 1: Signals on NO , NC , COM exceeding V+ or GND are clamped by internal diodes. Limit forward-diode current to maximum current rating. 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 (V+ = +2.7V to +3.6V, T = T to T , unless otherwise noted. Typical values are at T = +25C, unless otherwise noted.) (Notes 2, 3) A MIN MAX A PARAMETER SYMB O L CONDITIONS MIN TYP MAX UNITS Rx INTERFACE T = +25C59 V+ = 3V, I = 10mA, A COM On-Resistance R ON V or V = 1.5V NO NC T = T to T 10 A MIN MAX T = +25C 1.0 A On-Resistance Match Between V+ = 3V, I = 10mA, COM R ON Channels (Note 4) V or V = 1.5V NO NC T = T to T 1.3 A MIN MAX V+ = 3V I = 10mA T = +25C 2.0 3.0 COM A On-Resistance Flatness (Note 4) R V or V = 1.0V, FLAT(ON) NO NC 1.5V, 2.0V T = T to T 3.4 A MIN MAX I NO or NC Off-Leakage NO(OFF) V + = 3.6V V = 0.3V, 3.3V C OM -1 +1 A Current V or V = 3.3V, 0 .3V I N O N C NC (OFF) V+ = 3.6V V = 0.3V, 3.3V COM COM On-Leakage Current I -1 +1 A COM(ON) V or V = 3.3V, 0.3V or floating NO NC Tx INTERFACE T = +25C 0.7 0.9 A V + = 3V , I = 100m A, C OM On-Resistance (Note 5) R ON V or V = 1.5V N O N C T = T to T 1.0 A MIN MAX T = +25C 0.03 0.150 On-Resistance Match Between V + = 3V, I = 100m A, A C OM R ON Channels (Notes 3, 5) V or V = 1.5V N O N C T = T to T 0.175 A MIN MAX V+ = 3V T = +25C 0.1 0.18 A I = 100mA On-Resistance Flatness COM R FLAT(ON) (Notes 5, 6) V or V = 1.0V, NO NC T = T to T 0.2 A MIN MAX 1.5V, 2.0V 2 MAX4670