19-3915; Rev 1; 1/07 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes The MAX4818/MAX4819 high-bandwidth, low-on-resistance analog dual SPDT switches/4:1 multiplexers are designed to serve as integrated T1/E1 protection switches for 1+1 and N+1 line-card redundancy applications. Each MAX4818/MAX4819 replaces four electromechanical relays, significantly reducing board space, simplifying PC board routing, and reducing power consumption. These devices operate with ±3.3V or ±5V dual supplies for applications requiring T1/E1 signal switching in the line side of the interface transformer. Internal voltage multipliers drive the analog switches, yielding excellent linearity and low 4Ω typical on-resistance within the T1/E1 analog signal range. This high-bandwidth family of products is optimized for low return loss and matched pulse template performance in T1/E1 long-haul and short-haul applications. The MAX4818/MAX4819 are available in a tiny 16-pin, 5mm x 5mm, thin QFN package and are specified over the extended -40°C to +85°C temperature range. Applications Features ♦ Dual SPDT and 4:1 Multiplexer Configurations ♦ Dual-Supply Operation from ±3.3V to ±5V ♦ Single-Supply Operation from +6V to +11V ♦ Hot-Insertion Tolerant with No DC Path to the Supplies ♦ Low On-Resistance, RON = 4Ω (typ) and 6Ω (max) ♦ Over 350MHz -3dB Signal Bandwidth (MAX4818) ♦ Excellent Crosstalk and Off-Isolation Performance Over the T1/E1 Signal Spectrum: Over 110dB Crosstalk Attenuation at 1MHz (MAX4818) ♦ Low Current Consumption of 2mA (max) ♦ -40°C to +85°C Extended Temperature Range ♦ Space-Saving, 16-Pin, 5mm x 5mm Thin QFN ♦ SET Controls All Switches Simultaneously For Redundancy Switching (MAX4819) T1/E1 Redundancy Switching Pin Configurations Base Stations and Base-Station Controllers Multi-Service-Switches (MSSs) Digital Loop Carriers Industrial Applications COM1 13 IN1 14 N.C. NC2 Edge Routers V+ TOP VIEW Multi-Service Provisioning Platforms NC1 Add and Drop Multiplexers 12 11 10 9 8 COM2 7 IN2 6 EN 5 N.C. MAX4818 SET 15 N.C. 16 Data Acquisition 1 2 3 4 GND NO2 Avionics *EP V- Test Equipment + NO1 Telecom Signal Switching THIN QFN (5mm x 5mm) *EXPOSED PADDLE CONNECTED TO V- Pin Configurations continued at end of data sheet. Ordering Information PART TEMP RANGE PIN-PACKAGE CONFIGURATION PACKAGE CODE MAX4818ETE+ -40°C to +85°C 16 TQFN-EP* 2 x SPDT T1655-3 MAX4819ETE+ -40°C to +85°C 16 TQFN-EP* 4:1 MUX T1655-3 *EP = Exposed Paddle Devices are available in lead-free packages. ________________________________________________________________ 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 MAX4818/MAX4819 General Description MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND unless otherwise noted.) V+ ............................................................................-0.3V to +6V V- .............................................................................-6V to +0.3V V+ to V-...................................................................-0.3V to +12V IN_, A0, A1, SET, EN ....................................-0.3V to (V+) + 0.3V NO_, NC_, COM_ ....................................................-12V to +12V NO_, to COM_, NC_ to COM_ .................................-18V to +18V Continuous Current (NO_, NC_, COM_) ....................... ±100mA Continuous Current (Any Other Terminal) ........................±30mA Peak Current (NO_, NC_, COM_) (pulsed at 1ms, 10% duty cycle).................................±300mA Continuous Power Dissipation (TA = +70°C) 16-Pin Thin QFN 5mm x 5mm (derate 33.3mW/°C above TA = +70°C) ....................................................2667mW Operating Temperature Range ......................... -40°C to +85°C Storage Temperature Range ........................... -65°C to +150°C Junction Temperature .....................................................+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. ELECTRICAL CHARACTERISTICS—Dual ±3.3V Supplies (V+ = +3.3V ±10%, V- = -3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Fault-Free Analog Signal Range MAX4818 On-Resistance MAX4819 On-Resistance On-Resistance Match Between Channels VCOM_ VNO_ VNC_ RON RON ∆RON VV+ = +3V, V- = -3V, ICOM_ = 30mA, VNO_ or VNC_ = +3V (Note 2) V+ = +3V, V- = -3V, ICOM_ = 30mA, VNO_ or VNC_ = +3V (Note 2) V+ = +3V, V- = -3V, ICOM_ = 30mA, VNO_ or VNC_ = +3V (Notes 2, 3) TA = +25°C 4 TA = TMIN to TMAX 5 6 TA = +25°C 4 TA = TMIN to TMAX 5 6.2 TA = +25°C 0.3 TA = TMIN to TMAX 0.5 Ω 0.6 0.8 TA = +25°C Ω Ω 1.2 On-Resistance Flatness RFLAT(ON) V+ = +3V, V- = -3V, ICOM_ = 30mA, VNO_ or VNC_ = -3V, 0V, +3V (Notes 2, 4) NO or NC Off-Leakage Current INO_(OFF) INC_(OFF) V+ = +3.6V, V- = -3.6V, VCOM_ = -3V, +3V, VNO_ or VNC_ = +3V, -3V -10 +10 nA COM Off-Leakage Current ICOM_(OFF) V+ = +3.6V, V- = -3.6V, VCOM_ = -3V, +3V, VNO_ or VNC_ = +3V, -3V -10 +10 nA COM On-Leakage Current ICOM_(ON) V+ = +3.6V, V- = -3.6V, VCOM_ = -3V, +3V, VNO_ or VNC_ unconnected -15 +15 nA 2 TA = TMIN to TMAX 1.5 _______________________________________________________________________________________ Ω High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes (V+ = +3.3V ±10%, V- = -3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS FAULT Fault Analog Signal Range NO or NC Off-Leakage Current COM Off-Leakage Current VCOM_ VNO_ VNC_ V+ = +3.3V, V- = -3.3V -11 +11 V INO_ INC_ V+ = +3.3V, V- = -3.3V, VCOM_ = +11V, -11V, VNO_ or VNC_ = -5.5V, +5.5V -1 +1 µA ICOM_ V+ = +3.3V, V- = -3.3V, VCOM_ = +11V, -11V, VNO_ or VNC_ = -5.5V, +5.5V -1 +1 µA SWITCH DYNAMIC CHARACTERISTICS MAX4818 Crosstalk (Note 5) MAX4819 All-Hostile Crosstalk (Note 6) VCT1 RL = 50Ω, f = 1.024MHz, Figure 4 110 VCT2 RL = 50Ω, f = 30MHz, Figure 4 77 VHCT1 RL = 50Ω, f = 1.024MHz 50 VHCT2 RL = 50Ω, f = 30MHz 17 VISO1 VCOM_ to VNO_ or VNC_, RL = 50Ω, f = 1.024MHz, Figure 4 60 VISO2 VCOM_ to VNO_ or VNC_, RL = 50Ω, f = 30MHz, Figure 4 30 Off-Isolation (Note 7) On-Channel -3dB Bandwidth BW RS = RL = 50Ω, Figure 4 COM On-Capacitance CON(COM_) f = 1MHz, Figure 5 COM Off-Capacitance COFF(COM_) f = 1MHz, Figure 5 COFF f = 1MHz, Figure 5 NC/NO Off-Capacitance Charge Injection Q CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 3 dB dB dB MAX4818 350 MAX4819 220 MAX4818 20 MAX4819 40 MAX4818 15 MAX4819 30 MHz pF pF 7 MAX4818 35 MAX4819 60 Fault Recovery Time tREC VNO_, VNC_, VCOM_ = -11V Turn-On Time tON VNO_ or VNC_= +3V, RL = 300Ω, CL = 35pF, Figure 2 TA = TMIN to TMAX Turn-Off Time tOFF VNO_ or VNC_= +3V, RL = 300Ω, CL = 35pF, Figure 2 TA = TMIN to TMAX Power-Up Delay tDEL pF pC 128 TA = +25°C TA = +25°C 20 µs 50 50 0.5 1 1 128 µs µs µs _______________________________________________________________________________________ 3 MAX4818/MAX4819 ELECTRICAL CHARACTERISTICS—Dual ±3.3V Supplies (continued) MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes ELECTRICAL CHARACTERISTICS—Dual ±3.3V Supplies (continued) (V+ = +3.3V ±10%, V- = -3.3V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 0.8 V +1 µA LOGIC INPUT (IN_, EN, SET, A0, A1) Input Voltage Low VIL Input Voltage High VIH Input Leakage Current IIN VIN_ = 0 or V+ Quiescent Positive Supply Current I+ V+ = +3.6V, V- = -3.6V, VIN_ = 0 or V+ 0.8 2 mA Quiescent Negative Supply Current I- V+ = +3.6V, V- = -3.6V, VIN_ = 0 or V+ 0.8 2 mA 2.4 V -1 POWER SUPPLY Positive Supply Voltage V+ 3.0 3.6 V Negative Supply Voltage V- -3.6 -3.0 V ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (V+ = +5V ±10%, V- = -5V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS V+ V ANALOG SWITCH Fault-Free Analog Signal Range VCOM_ VNO_ VNC_ V- RON TA = +25°C V+ = +4.5V, V- = -4.5V, ICOM_ = 30mA, TA = TMIN to VNO_ or VNC_ = +3V (Note 2) TMAX 4 MAX4818 On-Resistance RON TA = +25°C V+ = +4.5V, V- = -4.5V, ICOM_ = 30mA, TA = TMIN to VNO_ or VNC_ = +3V (Note 2) TMAX 4 MAX4819 On-Resistance On-Resistance Match Between Channels ∆RON V+ = +4.5V, V- = -4.5V, ICOM_ = 30mA, VNO_ or VNC_ = +3V (Notes 2, 3) RFLAT(ON) NO or NC Off-Leakage Current INO_(OFF) INC_(OFF) V+ = +5.5V, V- = -5.5V, VCOM_ = -5V, +5V, VNO_ or VNC_ = +5V, -5V 4 V+ = +5.5V, V- = -5.5V, ICOM_(OFF) VCOM_ = -5V, +5V, VNO_ or VNC_ = +5V, -5V 0.3 Ω 0.6 0.8 0.5 Ω 5 6.2 TA = TMIN to TMAX On-Resistance Flatness COM Off-Leakage Current 6 TA = +25°C V+ = +4.5V, V- = -4.5V, TA = +25°C ICOM_ = 30mA, VNO_ or VNC_ = -3V, 0V, +3V TA = TMIN to TMAX (Notes 2, 4) 5 Ω 1.2 1.5 Ω -10 +10 nA -10 +10 nA _______________________________________________________________________________________ High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818/MAX4819 ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (continued) (V+ = +5V ±10%, V- = -5V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER COM On-Leakage Current SYMBOL CONDITIONS MIN TYP MAX UNITS V+ = +5.5V, V- = -5.5V, VCOM_ = -5V, +5V, VNO_ or VNC_ unconnected -15 +15 nA V+ =5V, V- = -5V -11 +11 V INO_ INC_ V+ = 5V, V- = -5V, VNO_ or VNC_ = +11V, -11V, VCOM_ = -5.5, +5.5V -1 +1 µA ICOM_ V+ = 5V, V- = -5V, VNO_ or VNC_ = +11V, -11V, VCOM_ = -5.5, +5.5V -1 +1 µA ICOM_(ON) FAULT Fault Analog Signal Range NO or NC Off-Leakage Current COM Off-Leakage Current VCOM_ VNO_ VNC_ SWITCH DYNAMIC CHARACTERISTICS MAX4818 Crosstalk (Note 5) MAX4819 All-Hostile Crosstalk (Note 6) Off-Isolation (Note 6) On-Channel -3dB Bandwidth VCT1 RL = 50Ω, f = 1.024MHz, Figure 4 110 VCT2 RL = 50Ω, f = 30MHz, Figure 4 77 VHCT1 RL = 50Ω, f = 1.024MHz 50 VHCT2 RL = 50Ω, f = 30MHz 17 VISO1 VCOM_ to VNO_ or VNC_, RL = 50Ω, f = 1.024MHz, Figure 4 60 VISO2 VCOM_ to VNO_ or VNC_, RL = 50Ω, f = 30MHz, Figure 4 30 BW RS = RL = 50Ω, Figure 4 COM On-Capacitance CON(COM_) f = 1MHz, Figure 5 COM Off-Capacitance COFF(COM_) f = 1MHz, Figure 5 NC/NO Off-Capacitance Charge Injection COFF Q Fault Recovery Time tREC CL = 1.0nF, VGEN = 0, RGEN = 0, Figure 3 350 MAX4819 220 MAX4818 20 MAX4819 40 MAX4818 15 MAX4819 30 MAX4818 35 MAX4819 60 VNO_ or VNC_= +3V, RL = 300Ω, CL = 35pF, Figure 2 Turn-Off Time tOFF VNO_ or VNC_= +3V, RL = 300Ω, CL = 35pF, Figure 2 Power-Up Delay tDEL MHz pF pF 7 VNO_, VNC_, VCOM_ = -11V tON Turn-On Time dB dB MAX4818 f = 1MHz, Figure 5 dB pF pC 128 TA = +25°C 20 TA = TMIN to TMAX TA = +25°C µs 50 50 0.5 TA = TMIN to TMAX 1 1 128 µs µs µs _______________________________________________________________________________________ 5 ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (continued) (V+ = +5V ±10%, V- = -5V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 0.8 V +1 µA LOGIC INPUT (IN_, EN, SET, A0, A1) Input Voltage Low VIL Input Voltage High VIH Input Leakage Current IIN VIN_ = 0 or V+ Quiescent Positive Supply Current I+ V+ = +5.5V, V- = -5.5V, VIN = 0 or V+ 0.9 2 mA Quiescent Negative Supply Current I- V+ = +5.5V, V- = -5.5V, VIN = 0 or V+ 0.9 2 mA 2.4 V -1 POWER SUPPLY Positive Supply Voltage V+ 4.5 5.5 V Negative Supply Voltage V- -5.5 -4.5 V All parameters are production tested at TA = +85°C and guaranteed by design over specified temperature range. Guaranteed by design, not production tested. ∆RON = RON_(MAX) – RON_(MIN). Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 5: Between any two switches. Note 6: All-hostile crosstalk from all OFF multiplexer inputs to the ON multiplexer channel. All-hostile crosstalk is tested by applying the same signal to all OFF inputs and measuring the crosstalk on the ON channel (COM terminal of the multiplexer.) Note 7: Off-Isolation = 20log10 [VCOM / (VNC or VNO)], VCOM = output, VNC or VNO = input to OFF switch. Note 1: Note 2: Note 3: Note 4: Typical Operating Characteristics (V+ = +3.3V, V- = -3.3V, TA = +25°C, unless otherwise noted.) MAX4818 ON-RESISTANCE vs. COM_ VOLTAGE TA = +85°C 1 0 TA = +25°C 3 TA = -40°C 2 0 1.1 2.2 3.3 4 TA = +25°C 3 TA = -40°C 2 1 0 -1.1 COM_ VOLTAGE (V) 6 TA = +85°C 4 1 -2.2 DUAL ±3.3V SUPPLIES 5 ON-RESISTANCE (Ω) TA = -40°C 2 -3.3 6 TA = +85°C TA = +25°C 3 5 ON-RESISTANCE (Ω) 4 DUAL ±5V SUPPLIES MAX4818 toc03 DUAL ±3.3V SUPPLIES 5 6 MAX4818 toc01 6 MAX4819 ON-RESISTANCE vs. COM_ VOLTAGE MAX4818 toc02 MAX4818 ON-RESISTANCE vs. COM_ VOLTAGE ON-RESISTANCE (Ω) MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes 0 -5 -3 -1 1 COM_ VOLTAGE (V) 3 5 -3.3 -2.2 -1.1 0 1.1 COM_ VOLTAGE (V) _______________________________________________________________________________________ 2.2 3.3 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4819 ON-RESISTANCE vs. COM_ VOLTAGE 4 TA = +25°C TA = -40°C 2 900 850 800 MAX4818 750 700 1 -3 -1 1 3 5.0 650 5.5 -40 -15 10 35 60 700 650 -15 10 35 60 NC_/NO_ = +3V, COM_ = -3V NC_/NO_ = -3V, COM_ = +3V -40 85 -15 10 35 60 500 460 420 380 340 300 260 220 180 140 100 60 20 -20 -60 85 DUAL ±3.6V SUPPLIES NO_ = +3V, COM_ = -3V NO_ = -3V, COM_ = +3V -40 -15 10 35 60 TEMPERATURE (°C) TEMPERATURE (°C) MAX4818 NC/NO(OFF) LEAKAGE CURRENT vs. TEMPERATURE MAX4819 NO(OFF) LEAKAGE CURRENT vs. TEMPERATURE MAX4818 COM(OFF) LEAKAGE CURRENT vs. TEMPERATURE 280 NC_/NO_ = +5V, COM_ = -5V 200 NC_/NO_ = -5V, COM_ = +5V -40 10 35 420 NO_ = +5V, COM_ = -5V 340 260 NO_ = -5V, COM_ = +5V 180 100 40 TEMPERATURE (°C) 500 60 85 DUAL ±3.6V SUPPLIES 340 300 LEAKAGE CURRENT (pA) LEAKAGE CURRENT (pA) 360 DUAL ±5.5V SUPPLIES 580 380 MAX4818 toc11 MAX4818 toc10 440 -15 660 85 MAX4818 toc12 TEMPERATURE (°C) DUAL ±5.5V SUPPLIES 85 MAX4818 toc09 DUAL ±3.6V SUPPLIES LEAKAGE CURRENT (pA) MAX4818 toc07 750 500 460 420 380 340 300 260 220 180 140 100 60 20 -20 -60 MAX4818 toc08 MAX4819 NO(OFF) LEAKAGE CURRENT vs. TEMPERATURE LEAKAGE CURRENT (pA) SUPPLY CURRENT (µA) 4.5 MAX4818 NC/NO(OFF) LEAKAGE CURRENT vs. TEMPERATURE DUAL ±3.3V SUPPLIES -40 4.0 MAX4819 SUPPLY CURRENT vs. TEMPERATURE 800 120 3.5 TEMPERATURE (°C) 850 520 750 DUAL SUPPLY VOLTAGE (V) DUAL ±5V SUPPLIES -40 DUAL ±3.3V SUPPLIES 800 COM_ VOLTAGE (V) 950 900 3.0 5 DUAL ±5V SUPPLIES 850 700 600 -5 LEAKAGE CURRENT (pA) 900 650 0 MAX4818 toc06 MAX4819 SUPPLY CURRENT (µA) TA = +85°C 950 SUPPLY CURRENT (µA) 5 950 MAX4818 toc05 DUAL ±5V SUPPLIES ON-RESISTANCE (Ω) 1000 MAX4818 toc04 6 3 MAX4818 SUPPLY CURRENT vs. TEMPERATURE SUPPLY CURRENT vs. SUPPLY VOLTAGE 260 220 180 COM_ = +3V, NC_/NO_ = -3V 140 100 COM_ = -3V, NC_/NO_ = +3V 60 20 20 -60 -20 -40 -15 10 35 TEMPERATURE (°C) 60 85 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ 7 MAX4818/MAX4819 Typical Operating Characteristics (continued) (V+ = +3.3V, V- = -3.3V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (V+ = +3.3V, V- = -3.3V, TA = +25°C, unless otherwise noted.) LEAKAGE CURRENT (pA) 600 520 COM_ = +3V, NO_ = -3V 440 360 280 COM_ = -3V, NO_ = +3V 200 120 40 10 35 60 85 180 COM_ = -5V, NO_ = +5V 100 -60 -15 10 35 -40 85 60 -15 10 35 60 MAX4818 COM(ON) LEAKAGE CURRENT vs. TEMPERATURE MAX4819 COM(ON) LEAKAGE CURRENT vs. TEMPERATURE MAX4818 COM(ON) LEAKAGE CURRENT vs. TEMPERATURE LEAKAGE CURRENT (pA) 320 260 COM_ = +3V 200 140 COM_ = -3V 20 -15 10 1100 1000 35 60 DUAL ±3.6V SUPPLIES 900 800 700 600 500 400 COM_ = +3V 300 200 100 0 -100 85 COM_ = -3V 500 440 380 320 260 COM_ = +5V 200 140 COM_ = -5V 20 -40 -40 -15 10 35 85 60 -40 -15 35 CHARGE INJECTION vs. COMMON VOLTAGE 140 MAX4818 toc19 100 CHARGE INJECTION (pC) DUAL ±5.5V SUPPLIES 10 TEMPERATURE (°C) TEMPERATURE (°C) MAX4819 COM(ON) LEAKAGE CURRENT vs. TEMPERATURE LEAKAGE CURRENT (pA) DUAL ±5.5V SUPPLIES 80 TEMPERATURE (°C) 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 -100 620 560 COM_ = +5V MAX4819 60 20 -20 COM_ = -5V MAX4818 -60 -100 -40 -15 10 35 TEMPERATURE (°C) 60 85 MAX4818 toc18 TEMPERATURE (°C) 80 8 COM_ = +5V, NO_ = -5V 260 20 -40 380 -40 COM_ = -5V, NC_/NO_ = +5V 340 TEMPERATURE (°C) 440 -20 COM_ = +5V, NC_/NO_ = -5V 420 TEMPERATURE (°C) DUAL ±3.6V SUPPLIES 500 DUAL ±5.5V SUPPLIES 500 MAX4818 toc20 560 -15 580 LEAKAGE CURRENT (pA) -40 MAX4818 toc16 -40 DUAL ±5.5V SUPPLIES MAX4818 toc17 LEAKAGE CURRENT (pA) 680 460 420 380 340 300 260 220 180 140 100 60 20 -20 -60 LEAKAGE CURRENT (pA) DUAL ±3.6V SUPPLIES MAX4819 COM(OFF) LEAKAGE CURRENT vs. TEMPERATURE MAX4818 toc14 MAX4818 toc13 840 760 MAX4818 COM(OFF) LEAKAGE CURRENT vs. TEMPERATURE MAX4818 toc15 MAX4819 COM(OFF) LEAKAGE CURRENT vs. TEMPERATURE LEAKAGE CURRENT (pA) MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes 85 -5 -3 -1 1 3 VCOM (V) _______________________________________________________________________________________ 5 60 85 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818 CROSSTALK vs. FREQUENCY -20 LOSS (dB) LOSS (dB) -60 MAX4818 toc22 0 MAX4818 toc21 -40 MAX4819 ALL-HOSTILE CROSSTALK vs. FREQUENCY -80 -100 -40 -60 -120 -80 0.1 1 100 10 0.1 1 FREQUENCY (MHz) MAX4818 FREQUENCY RESPONSE MAX4819 FREQUENCY RESPONSE -1 -3 -6 LOSS (dB) -2 LOSS (dB) MAX4818 toc24 0 MAX4818 toc23 0 -3 -4 -9 -12 -5 -15 -6 -18 -7 -21 0.1 1 10 100 1000 0.1 FREQUENCY (MHz) 10 100 1000 MAX4819 OFF-ISOLATION vs. FREQUENCY -20 LOSS (dB) -40 -60 -80 MAX4818 toc26 0 MAX4818 toc25 -20 1 FREQUENCY (MHz) MAX4818 OFF-ISOLATION vs. FREQUENCY 0 LOSS (dB) 100 10 FREQUENCY (MHz) -40 -60 -80 -100 -100 0.1 1 10 FREQUENCY (MHz) 100 0.1 1 10 100 FREQUENCY (MHz) _______________________________________________________________________________________ 9 MAX4818/MAX4819 Typical Operating Characteristics (continued) (V+ = +3.3V, V- = -3.3V, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (V+ = +3.3V, V- = -3.3V, TA = +25°C, unless otherwise noted.) T1 (100Ω) SCOPE SHOT OF THE INPUT AND OUTPUT OF DEVICE T1 (100Ω) PULSE TEMPLATE TEST MAX4818 toc28 MAX4818 toc27 1.2 NORMALIZED AMPLITUDE 0.9 0.6 INPUT 1V/div 0.3 0 OUTPUT 1V/div -0.3 -0.6 -500 -300 -100 100 300 500 700 200ns/div TIME (ns) T1 (120Ω) SCOPE SHOT OF THE INPUT AND OUTPUT OF DEVICE E1 (120Ω) PULSE TEMPLATE TEST 1.1 NORMALIZED AMPLITUDE MAX4818 toc30 MAX4818 toc29 1.3 0.9 0.7 INPUT 1V/div 0.5 0.3 0.1 OUTPUT 1V/div -0.1 -0.3 -250 -200 -150 -100 -50 0 50 100 150 200 250 100ns/div TIME (ns) E1 (75Ω) SCOPE SHOT OF THE INPUT AND OUTPUT OF DEVICE E1 (75Ω) PULSE TEMPLATE TEST MAX4818 toc32 MAX4818 toc31 1.3 1.1 NORMALIZED AMPLITUDE MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes 0.9 0.7 INPUT 1V/div 0.5 0.3 0.1 OUTPUT 1V/div -0.1 -0.3 -250 -200 -150 -100 -50 0 50 100 150 200 250 100ns/div TIME (ns) 10 ______________________________________________________________________________________ High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes PIN NAME FUNCTION MAX4818 MAX4819 1 1 2 2 V- 3 3 GND Ground 4 12 NO2 Analog Multiplexer Normally Open Terminal 2 5, 10, 16 5, 8, 10, 16 N.C. NO1 Analog Multiplexer Normally Open Terminal 1 Negative Supply Voltage. Bypass V- to ground with a 0.1µF ceramic capacitor. No Connect. Not Internally Connected. EN Enable Input. Connect EN to V+ or a logic-high for normal operation. Connect EN to ground to disable all switches. — IN2 Switch 2 Logic-Level Input (See Table 1) — COM2 9 — NC2 11 11 V+ 12 — NC1 13 — COM1 6 6 7 8 Analog Switch Common Terminal 2 Analog Switch Normally Close Terminal 2 Positive Supply Voltage. Bypass V+ to ground with a 0.1µF ceramic capacitor. Analog Switch Normally Close Terminal 1 Analog Switch Common Terminal 1 14 — IN1 Switch 1 Logic-Level Input (See Table 1) 15 15 SET Logic Input. Drive SET logic-high to set all switches. (See Tables 1, 2) — 4 NO4 — 7 A0 — 9 NO3 — 13 COM — 14 A1 Multiplexer Address Input 1 (See Table 2) EP EP EP Exposed Paddle. Connect exposed paddle to V- or leave unconnected. Analog Multiplexer Normally Open Terminal 4 Multiplexer Address Input 0 (See Table 2) Analog Multiplexer Normally Open Terminal 3 Analog Multiplexer Common Terminal Detailed Description The MAX4818/MAX4819 are each a high-bandwidth, low-on-resistance dual-SPDT analog switch/4:1 multiplexer, respectively. Both the MAX4818 and the MAX4819 are designed to serve as integrated T1/E1 analog protection switches for 1+1 and N+1 line-card redundancy applications. These devices replace electromechanical relays to save board space, reduce power consumption, and simplify PC board routing. The MAX4818/ MAX4819 allow the user to live insert the boards with no adverse effects. The MAX4818/MAX4819 operate from ±3.3V or ±5V dual supplies, which are required for E1/T1 signal switching in the line-side of the interface transformer. Internal voltage multipliers supply the switches yielding excellent linearity and low on-resistance, typically 4Ω within the E1/T1 analog signal range. This high-bandwidth family of devices is optimized for low return loss and matched pulse template performance in E1/T1 short-haul and long-haul applications. Logic Inputs The MAX4818 has four digital control inputs: EN, SET, IN1, and IN2. The EN input enables the switches. A logic 1 on SET connects COM to the NO_ terminal. IN_ controls the switch when SET is low, as shown in Table 1. The MAX4819 has four digital control inputs: EN, SET, A1, and A0. The EN input enables the multiplexer. A logic 1 on SET connects all NO_ to COM. A1 and A0 control which terminal will be connected to COM when SET is low, as shown in Table 2. Analog Signal Levels The on-resistance of the MAX4818/MAX4819 is very low and stable as the analog signals are swept from V- to V+ (see the Typical Operating Characteristics). ______________________________________________________________________________________ 11 MAX4818/MAX4819 Pin Description MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes Fault Protection The fault protection of the MAX4818/MAX4819 allows the devices to handle input signals of more than twice the supply voltage without clamping the signal, latching up, or disturbing other cards in the system. The device detects when the input voltage drops below the negative supply. As soon as a fault condition is detected, the switch is immediately turned off for 128 clock cycles (typically 128µs). At the end of the 128µs timeout, the switch is turned back on for one clock cycle. At the end of the one clock cycle, if the signal is within the operating range, the switch will remain on. Otherwise, the device will turn the switch off again for 128 clock cycles. This will repeat until the signal is within the operating range. In T1/E1 redundancy applications, this can happen when the load resistor (RL) is removed or disconnected for any reason, as shown in Figure 1. Without a load resistor, the output voltage when using a 1:2 transformer can be as high as ±11V. Table 1. Dual SPDT Truth Table (MAX4818) EN SET IN_ COM_ CONNECTION 0 X X NONE 1 0 0 NC_ 1 0 1 NO_ 1 1 X NO_ (X = don’t care.) Table 2. 4:1 Multiplexer Truth Table (MAX4819) EN SET A1 A0 0 X X X NONE 1 0 0 0 NO1 1 0 0 1 NO2 Hot Insertion 1 0 1 0 NO3 The MAX4818/MAX4819 tolerate hot insertions, thus are not damaged when inserted into a live backplane. Competing devices can exhibit low impedance when plugged into a live backplane that can cause high power dissipation leading to damage of the device itself. The MAX4818/MAX4819 have relatively high input impedance when V+ and V- supplies are unconnected or connected to GND. Therefore, the devices are not destroyed by a hot insertion. In order to guarrantee data integrity, the V+ and V- supplies must be properly biased. 1 0 1 1 NO4 1 1 X X NO1, NO2, NO3, NO4 Applications Information T1/E1 N+1 Redundancy Figures 6, 7, and 8 show a basic architecture for twistedpair interface (120Ω, E1 or 100Ω, T1). Coaxial cable interface (75Ω, E1) can be illustrated with the same figures but without the single-ended to differential conversion stage. A single protection card can replace up to N line cards in a N+1 redundancy scheme. Figure 6 shows the switches sitting in the line cards where they can reroute any of the input/output signals to a protection line card. Figure 7 shows a “multiplexed” redundancy architecture using the MAX4819 where the multiplexers are in the line cards. This architecture is more scalable as the number of boards is increased. It also does not 12 COM CONNECTION (X = don’t care.) MAX4818 MAX4819 5V ±10% TTIP 1:2 NO 10V ±10% COM RL LIU Tx + Vo - TRING Figure 1. Fault Protection require a dedicated external switching card as the multiplexers reside in the line cards themselves. The number of signals routed through the backplane is substantially higher than in the switching-card architecture. Figure 8 shows a similar architecture, but the multiplexers reside in the protection switching card. These figures do not show the surge-protection elements and resistors for line termination/impedance matching. ______________________________________________________________________________________ High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes V+ 3V V+ NO_ (OR NC_) VIN_ 3V 50% 0V MAX4818 MAX4819 VIN_ GND 3V VOUT COM_ 90% 90% VOUT V- CL RL 0V tOFF V- tON () FOR MAX4818 Figure 2. Switch Turn-On/Turn-Off Times V+ VIN_ RGEN IN_ V+ NO_ (OR NC_) 3V VGEN MAX4818 MAX4819 0V VOUT COM_ GND VIN_ VOUT ∆VOUT VCL V- ∆VOUT IS THE MEASURED VOLTAGE DUE TO CHARGETRANSFER ERROR Q WHEN THE CHANNEL TURNS OFF. Q = ∆VOUT x CL () FOR MAX4818 Figure 3. Charge Injection 50Ω RESISTOR ONLY NEEDED FOR CROSSTALK AND ISOLATION V+ 0.1µF VIN V+ NETWORK ANALYZER 50Ω 50Ω COM_ 3.0V MAX4818 MAX4819 50Ω IN_ VOUT NO_, (NC_) GND V- MEAS REF 50Ω 50Ω 0.1µF VMEASUREMENTS ARE STANDARDIZED AGAINST SHORT AND OPEN AT SOCKET TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ OR NC_ TERMINALS. ON-RESPONSE IS MEASURED BETWEEN COM_ AND ON NO_ OR NC_ TERMINALS. CROSSTALK IS MEASURED FROM ONE CHANNEL TO ALL OTHER CHANNELS. () FOR MAX4818 Figure 4. On-Loss, Off-Isolation, and Crosstalk ______________________________________________________________________________________ 13 MAX4818/MAX4819 Test Circuits/Timing Diagrams High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818/MAX4819 Test Circuits/Timing Diagrams (continued) V+ 0.1µF V+ NC_ (OR NO_) V+ IN_ MAX4818 MAX4819 1MHz CAPACITANCE ANALYZER COM_ V- GND 0.1µF V- () FOR MAX4818 Figure 5. Channel Off-/On-Capacitance The low on-resistance and high-bandwidth of the MAX4818/MAX4819 yield good pulse template and return-loss performance (see the Typical Operating Characteristics). The pulse template tests for E1 (twisted-pair interface 120Ω and coaxial interface 75Ω) and T1 (twisted-pair interface 100Ω) were tested using the Dallas DS2155 single-chip-transceiver evaluation board, and twelve switches in parallel with one switch closed and the other eleven open. The internal transmit 14 termination feature must be disable when using this circuit. In order to use the same transmit resistors for E1 twisted-pair and coaxial cables, the Transmit Line Buildout Control Register (TLBC) is set to the value 6Ah. This sets the driver voltage so the output pulse has the right amplitude for both 120Ω (twisted pair) and 75Ω (coaxial) loads. The analog switches were powered with dual power supplies at ±5V. ______________________________________________________________________________________ High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818/MAX4819 LINE CARD 1 NC1 T1/E1 LIU Tx/Rx COM1 NO1 I/O 1 MAX4818 LINE CARD 2 NC1 T1/E1 LIU Tx/Rx COM1 NO1 I/O 2 MAX4818 LINE CARD 3 NC1 T1/E1 LIU Tx/Rx NO1 COM1 I/O 3 MAX4818 LINE CARD N NC1 T1/E1 LIU Tx/Rx COM1 NO1 I/O N MAX4818 PROTECTION LINE CARD T1/E1 LIU Tx/Rx PROTECTION SWITCHING CARD SINGLE-ENDED TO DIFFERENTIAL CONVERSION Figure 6. Switch Architecture for Twisted-Pair Cable (120Ω, E1 or 100Ω, T1). Same figure for Coaxial Cable (75Ω, E1) without the singleended-to-differential conversion. ______________________________________________________________________________________ 15 MAX4818/MAX4819 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes LINE CARD 1 1:4 I/O 1 T1/E1 LIU Tx/Rx MAX4819 LINE CARD 2 1:4 T1/E1 LIU Tx/Rx I/O 2 MAX4819 LINE CARD 3 1:4 T1/E1 LIU Tx/Rx I/O 3 MAX4819 LINE CARD N 1:4 T1/E1 LIU Tx/Rx I/O N MAX4819 PROTECTION LINE CARD 1:4 T1/E1 LIU Tx/Rx MAX4819 BACKPLANE SINGLE-ENDED TO DIFFERENTIAL CONVERSION Figure 7. Multiplexed Redundancy Architecture with Multiplexer in the Line Cards for Twisted-Pair Cable (120Ω, E1 or 100Ω, T1). Same figure for coaxial cable (75Ω, E1) without the single-ended-to-differential conversion. 16 ______________________________________________________________________________________ High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818/MAX4819 LINE CARD 1 1:4 I/O 1 T1/E1 LIU Tx/Rx MAX4819 LINE CARD 2 1:4 T1/E1 LIU Tx/Rx I/O 2 MAX4819 LINE CARD 3 1:4 T1/E1 LIU Tx/Rx I/O 3 MAX4819 LINE CARD N 1:4 T1/E1 LIU Tx/Rx I/O N MAX4819 PROTECTION LINE CARD 1:4 T1/E1 LIU Tx/Rx MAX4819 PROTECTION SWITCHING CARD SINGLE-ENDED TO DIFFERENTIAL CONVERSION Figure 8. Multiplexed Redundancy Architecture with Multiplexer Out of the Line Cards for Twisted-Pair Cable (120Ω, E1 or 100Ω, T1). Same figure for coaxial cable (75Ω, E1) without the single-ended-to-differential conversion. ______________________________________________________________________________________ 17 High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818/MAX4819 Typical Operating Circuits .. . . .. .. . LINE CARD N . .. .. . .. LINE CARD 2 LINE CARD 1 IN1 NC1 T1/E1 LIU Tx COM1 NO1 TRANSMIT ZL IN2 NC2 T1/E1 LIU Rx ZL COM2 NO2 RECEIVE ZL MAX4818 ZL PROTECTION LINE CARD T1/E1 LIU Tx ZL T1/E1 LIU Rx ZL ZL = 75Ω, 100Ω, OR 120Ω 18 ______________________________________________________________________________________ . High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes .. . .. LINE CARD N . . .. . .. .. . .. . LINE CARD 2 LINE CARD 1 COM T1/E1 LIU Tx NO1 NO2 NO3 NO4 TRANSMIT ZL MAX4819 ZL NO1 NO2 NO3 NO4 COM T1/E1 LIU Rx RECEIVE ZL ZL MAX4819 BACKPLANE PROTECTION LINE CARD COM T1/E1 LIU Tx MAX4819 ZL COM T1/E1 LIU Rx ZL NO1 NO2 NO3 NO4 NO1 NO2 NO3 NO4 MAX4819 ZL = 75Ω, 100Ω, OR 120Ω ______________________________________________________________________________________ 19 MAX4818/MAX4819 Typical Operating Circuits (continued) High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes MAX4818/MAX4819 Functional Diagram V+ V+ NO1 IN1 NC1 COM1 NO2 NO2 IN2 NO3 NC2 COM2 NO1 COM NO4 CONTROL LOGIC A1 A0 SET CONTROL LOGIC EN SET EN V- MAX4818 GND Chip Information V- MAX4819 GND Pin Configurations (continued) COM 13 A1 14 V+ N.C. NO3 TOP VIEW NO2 PROCESS: BiCMOS CONNECT EXPOSED PADDLE TO V-. 12 11 10 9 8 N.C. 7 A0 6 EN 5 N.C. MAX4819 *EP + 1 2 3 4 NO4 16 GND N.C. V- 15 NO1 SET THIN QFN (5mm x 5mm) *EXPOSED PADDLE CONNECTED TO V- 20 ______________________________________________________________________________________ High-Bandwidth T1/E1 Dual-SPDT Switches/ 4:1 Muxes QFN THIN.EPS Revision History Pages changed at Rev 1: 1, 12, 21 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 ____________________ 21 © 2007 Maxim Integrated Products Boblet is a registered trademark of Maxim Integrated Products, Inc. MAX4818/MAX4819 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.)