MAX4670ETJ+T Maxim Integrated Products, MAX4670ETJ+T Datasheet

IC PROT SWITCH T1/E1/J1 32-TQFN

MAX4670ETJ+T

Manufacturer Part Number
MAX4670ETJ+T
Description
IC PROT SWITCH T1/E1/J1 32-TQFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX4670ETJ.pdf (20 pages)

Specifications of MAX4670ETJ+T

Applications
*
Mounting Type
Surface Mount
Package / Case
32-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX4670 is an integrated T1/E1/J1 analog protec-
tion switch for 1+1 and N+1 line-card redundancy
applications. It protects two T1/E1/J1 ports by combin-
ing eight SPDT switches in a single package. The
switch is optimized for high-return loss and pulse-tem-
plate performance in T1/E1/J1 long-haul and short-haul
applications. The part offers built-in chip-side surge
protection capability for short-haul intrabuilding appli-
cations.
The MAX4670 replaces two diode arrays or two tran-
sient voltage suppressors (TVSs) and four dual-SPDT
relays, significantly reducing board space and simplify-
ing PC board routing. The MAX4670 pinout is targeted
for T1/E1/J1 applications, resulting in a simplified layout
when interfacing with standard line transformers and
line interface units (LIUs).
The MAX4670 has four 1.0Ω (max) on-resistance switch-
es with 60pF/40pF on-/off-capacitances for interfacing to
the LIU transmitter outputs. The MAX4670 also includes
four 10Ω (max) on-resistance switches with low
24pF/12pF on-/off-capacitances for interfacing to the LIU
receiver inputs. Four logic inputs control the receive/
transmit pairs, in addition to a SWITCH input that con-
nects all switches to the system’s protection bus.
The MAX4670 operates from a single +2.7V to +3.6V
supply and is available in 32-pin thermally enhanced
TQFN package. The MAX4670 is specified over the
-40°C to +85°C operating temperature range.
19-3798; Rev 0; 09/06
Functional Diagram/Truth Table appears at end of data sheet.
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.
Optical Multiplexers (ADMs, M13s, etc.)
Edge Routers
Multiservice Switches
Base Station Controllers (Wireless Infrastructure
Equipment)
Media Gateways (VoIP)
________________________________________________________________ Maxim Integrated Products
General Description
Integrated T1/E1/J1 Short-Haul and
Applications
Long-Haul Protection Switch
o Single +3.3V Supply Voltage
o Quad-DPDT/Octal-SPDT Switches Support
o Low R
o 0.7Ω (typ) in Transmit Path; 5Ω (typ) in
o Low C
o Chip Surge Protection
o -70dB (typ) Crosstalk/Off-Isolation (3MHz)
o Small, 32-Pin TQFN Package
*This part operates at a -40°C to +85°C temperature range.
MAX4670ETJ
Two T1/E1/J1 Ports
Receive Path
*NOTE:
TOP VIEW
EXPOSED PADDLE
CONNECTED TO GND
60pF/40pF (typ) in Transmit Path
24pF/12pF (typ) in Receive Path
IEC 61000-4-5 (8µs to 20µs Surge)
Class 2 (±1kV)
PART*
COM1
COM2
NO2
NC2
NO1
NC1
INA
V+
ON
ON
25
26
27
28
29
30
31
32
/C
OFF
PIN-
PACKAGE
32 TQFN
(5mm x 5mm)
*EP
Ordering Information
MAX4670
TQFN
Pin Configuration
PROTECTION
SURGE
YES
Features
16
15
14
13
12
11
10
9
T3255-4
CODE
PKG
NC7
NO7
NC8
NO8
COM8
COM7
IND
V+
1

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MAX4670ETJ+T Summary of contents

Page 1

... Base Station Controllers (Wireless Infrastructure Equipment) Media Gateways (VoIP) Functional Diagram/Truth Table appears 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. Long-Haul Protection Switch o Single +3.3V Supply Voltage ...

Page 2

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) V+, IN_, SWITCH ......................................................-0.3V to +4V COM_, NO_, NC_ (Note 1) ...........................-0.3V to (V+ + 0.3V) Continuous Current NO_, NC_, COM_ (Tx interface)..................................±150mA NO_, NC_, ...

Page 3

Integrated T1/E1/J1 Short-Haul and ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V MIN MAX PARAMETER SYM NO_ or NC_ Off-Leakage I NO(OFF), Current I NC(OFF) COM_ On-Leakage Current I COM(ON) DYNAMIC ...

Page 4

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch ELECTRICAL CHARACTERISTICS (continued) (V+ = +2.7V to +3.6V unless otherwise noted. Typical values are MIN MAX PARAMETER SYM DIGITAL I/O (IN_, ...

Page 5

Integrated T1/E1/J1 Short-Haul and (V+ = 3.0V +25°C, unless otherwise noted.) A ON-RESISTANCE vs. COM_ VOLTAGE OVER TEMPERATURE (Rx INTERFACE +85° 0.3 0.6 0.9 1.2 ...

Page 6

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch (V+ = 3.0V +25°C, unless otherwise noted.) A TURN-OFF TIME vs. SUPPLY VOLTAGE (Tx INTERFACE 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 ...

Page 7

Integrated T1/E1/J1 Short-Haul and PIN NAME — N.C. No Connection. Not internally connected. Transmitter 1 Logic Control. Drive INB high to connect NC3 and NC4. INB logic is ignored 1 INB when SWITCH asserts low. Common Terminal 3. Transmitter 1 ...

Page 8

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch PIN NAME 22 NC4 Normally Closed Terminal 4. Transmitter 1 differential terminal. Connect NC4 to LIU receiver. Normally Open Terminal 3. Transmitter 1 differential protection terminal. Connect NO3 to the 23 NO3 protection ...

Page 9

Integrated T1/E1/J1 Short-Haul and MAX4670 NO1 NC1 NO2 NC2 0.6Ω NO3 0.6Ω NC3 0.6Ω NO4 0.6Ω NC4 0.6Ω NO5 0.6Ω NC5 0.6Ω NO6 0.6Ω NC6 NO7 NC7 NO8 NC8 Figure 1. Functional Diagram In a switching-card architecture, a common switching ...

Page 10

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch Table 1. MAX4670 Truth Table SWITCH INA NC1/NC2 LOW X OFF HIGH LOW OFF HIGH HIGH ON — INB NC3/NC4 LOW X OFF HIGH LOW OFF HIGH HIGH ON — INC NC5/NC6 LOW ...

Page 11

Integrated T1/E1/J1 Short-Haul and MAX4670 V NO_ NO_ OR OR NC_ V NC_ IN_ GND LOGIC INPUT C INCLUDES FIXTURE AND STRAY CAPACITANCE OUT WHERE ...

Page 12

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch +3V 0.1µ IN_ NC_ MAX4670 COM_ 50Ω GND MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH ...

Page 13

Integrated T1/E1/J1 Short-Haul and RECEIVE PATH LINE CARD 1 RTIP LIU R X RRING LINE CARD 2 RTIP LIU R X RRING LINE CARD 3 RTIP LIU R X RRING BACKUP LINE CARD RTIP LIU R X RRING Figure 7. ...

Page 14

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch TRANSMIT PATH LINE CARD 1 TRING LIU T X LINE CARD 2 TRING LIU T X LINE CARD 3 TRING LIU T X BACKUP LINE CARD LIU T X TRING Figure 8. Switching-Card-Architecture ...

Page 15

Integrated T1/E1/J1 Short-Haul and RECEIVE PATH Figure 9. Adjacent-Card-Architecture Receive Path ______________________________________________________________________________________ Long-Haul Protection Switch LINE CARD 1 MAX4670 COM1 COM2 RTIP Rr LIU RRING LINE CARD 2 MAX4670 COM1 COM2 RTIP Rr LIU ...

Page 16

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch TRANSMIT PATH Figure 10. Adjacent-Card-Architecture Transmit Path 16 ______________________________________________________________________________________ LINE CARD 1 MAX4670 COM3 COM4 R T TTIP LIU TRING LINE CARD 2 MAX4670 COM3 COM4 R T TTIP LIU ...

Page 17

Integrated T1/E1/J1 Short-Haul and 1MΩ 1500Ω DISCHARGE CHARGE-CURRENT- RESISTANCE LIMIT RESISTOR HIGH STORAGE VOLTAGE 100pF CAPACITOR DC SOURCE Figure 11. Human Body ESD Test Model I 100 90% AMPERES 36.8% 10% ...

Page 18

Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switch MAX4670 NO1 NC1 NO2 NC2 0.6Ω NO3 0.6Ω NC3 0.6Ω NO4 0.6Ω NC4 0.6Ω NO5 0.6Ω NC5 0.6Ω NO6 0.6Ω NC6 NO7 NC7 NO8 NC8 18 ______________________________________________________________________________________ Functional Diagram/Truth Table ...

Page 19

Integrated T1/E1/J1 Short-Haul and (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) ______________________________________________________________________________________ Long-Haul Protection Switch Package Information (continued) 19 ...

Page 20

... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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