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MAX4670
Integrated T1/E1/J1 Short-Haul and Long-Haul Protection Switches
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Status
Active: In Production.
Description
The MAX4670 is an integrated T1/E1/J1 analog protection switch for 1+1 and N+1 line-card redundancy applications. It protects two T1/E1/J1 ports by combining eight SPDT switches in a single package. The switch is optimized for high-return loss and pulse-template 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 applications.
The MAX4670 replaces two diode arrays or two transient voltage suppressors (TVSs) and four dual-SPDT relays, significantly reducing board space and simplifying 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 switches 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 active-low SWITCH input that connects 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.
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Data Sheet
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Key Features
- Single +3.3V Supply Voltage
- Quad-DPDT/Octal-SPDT Switches Support Two T1/E1/J1 Ports
- Low RON
- 0.7Ω (typ) in Transmit Path; 5Ω (typ) in Receive Path
- Low CON/COFF
- 60pF/40pF (typ) in Transmit Path
- 24pF/12pF (typ) in Receive Path
- Chip Surge Protection
- IEC 61000-4-5 (8µs to 20µs Surge)
- Class 2 (±1kV)
- -70dB (typ) Crosstalk/Off-Isolation (3MHz)
- Small, 32-Pin TQFN Package
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Key Specifications:
| Switches and Multiplexers (Low Voltage) |
| Part Number |
Config. |
Channels |
Normal Position |
VSUPPLY (Single)
(V) |
VSUPPLY (Single)
(V) |
VSIGNAL
(V) |
VSIGNAL
(V) |
Dynamic Range (max)
(V) |
RON
(Ω) |
RFLAT(ON) |
BW
(MHz) |
IL(OFF)
(nA) |
tON
(ns) |
tOFF
(ns) |
QINJECTION
(pC) |
CON
(pF) |
COFF
(pF) |
Budgetary Price |
| min |
max |
min |
max |
max |
max |
typ |
max |
min |
max |
max |
max |
See Notes |
| MAX4670 |
DPDT |
4 |
Open/Closed |
2.7 |
3.6 |
0 |
3.6 |
3.6 |
9 |
2 |
30 |
0.01 |
400 |
200 |
8 |
24 |
12 |
$4.79 @1k |
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See All Switches and Multiplexers (Low Voltage) (186)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Functional Diagram
Reliability Reports
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX4670ETJ
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255-4*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX4670ETJ+
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4670ETJ+T
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Active |
TQFN;32 pin;26 mm²
Outline Drawing:21-0140 (PDF)
Land Pattern: 90-0012 (PDF)
Use pkgcode/variation: T3255+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX4670ETJ-T
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Active |
QFN;32 pin
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-3798
Rev 0;
2006-10-05
This page last modified: 2009-08-04
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