MAX4818 Datasheet, PDF (1/21 Pages) Maxim Integrated Products – High-Bandwidth T1/E1 Dual-SPDT Switches/4:1 Muxes

19-3915; Rev 1; 1/07
High-Bandwidth T1/E1 Dual-SPDT Switches/
4:1 Muxes
General Description
The MAX4818/MAX4819 high-bandwidth, low-on-resis-
tance 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 appli-
cations. 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 trans-
former. 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
T1/E1 Redundancy Switching
Base Stations and Base-Station Controllers
Add and Drop Multiplexers
Multi-Service Provisioning Platforms
Edge Routers
Multi-Service-Switches (MSSs)
Digital Loop Carriers
Industrial Applications
Data Acquisition
Telecom Signal Switching
Test Equipment
Avionics
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, R_ON = 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)
Pin Configurations
TOP VIEW
COM1 13
IN1 ₁₄
SET 15
N.C. 16
12 11 10 9
MAX4818
+
*EP
1
2
3
4
8 COM2
7 IN2
6 EN
5 N.C.
THIN QFN (5mm x 5mm)
*EXPOSED PADDLE CONNECTED TO V-
Pin Configurations continued at end of data sheet.
PART
TEMP RANGE
MAX4818ETE+
-40°C to +85°C
MAX4819ETE+
-40°C to +85°C
*EP = Exposed Paddle
Devices are available in lead-free packages.
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
Ordering Information
CONFIGURATION
2 x SPDT
4:1 MUX
PACKAGE CODE
T1655-3
T1655-3
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