19-3951; Rev 2; 1/07
High-Bandwidth, T1/E1, SPST Analog Switches
General Description
Features
♦ Quad-SPST NO, NC, and NC/NO Configurations
♦ Dual-Supply Operation from ±±3±ꢀ to ±ꢁꢀ
♦ Single-Supply Operation from +6ꢀ to +11ꢀ
The MAX4815/MAX4816/MAX4817 high-bandwidth,
low-on-resistance, quad-SPST analog switches are
designed to serve as integrated T1/E1 protection
switches for 1+1 and N+1 line-card redundancy appli-
cations. Each MAX4815/MAX4816/MAX4817 replaces
four electromechanical relays, significantly reducing
board space, simplifying PC board routing, and reduc-
ing power consumption. These devices operate with
±±.±3 or ±53 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 ±.7Ω typi-
cal on-resistance within the T1/E1 analog signal range.
This high-bandwidth (550MHz typical) family of prod-
ucts is optimized for low return loss and matched pulse
template performance in T1/E1 long-haul and short-haul
applications.
♦ Hot Insertion Tolerant with No DC Path to the
Supplies
♦ Low On-Resistance, R
= ±37Ω (typ) and 6Ω
ON
(max)
♦ Over ꢁꢁ0MHz, -±dB Signal Bandwidth
♦ Excellent Crosstalk and Off-Isolation Performance
Over the T1/E1 Signal Spectrum: 110dB Crosstalk
Attenuation at 1MHz
♦ Low Current Consumption of 2mA (max)
♦ -40°C to +8ꢁ°C Extended Temperature Range
♦ Space-Saving, 16-Pin, ꢁmm x ꢁmm Thin QFN
The MAX4815/MAX4816/MAX4817 are available in a
tiny 16-pin, 5mm x 5mm, thin QFN package and are
specified over the extended -40°C to +85°C tempera-
ture range.
Pin Configurations
Applications
T1/E1 Redundancy Switching
Base Stations and Base-Station Controllers
Add and Drop Multiplexers
Multiservice Provisioning Platforms
Edge Routers
TOP VIEW
12
11
10
9
COM2
IN2
13
14
15
16
8
7
6
5
COM3
IN3
MAX4815
Multiservice Switches (MSSs)
Digital Loop Carriers
IN1
IN4
+
1
*EP
COM1
COM4
Industrial Applications
Data Acquisition
2
3
4
Telecom Signal Switching
Test Equipment
THIN QFN (ꢁmm x ꢁmm)
*EXPOSED PADDLE CONNECTED TO ꢀ-
Avionics
Pin Configurations continued at end of data sheet.
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 TQFN-EP*
16 TQFN-EP*
16 TQFN-EP*
CONFIGURATION
PKG CODE
MAX481ꢁETE+
MAX4816ETE+
MAX4817ETE+
4 x SPST NC
T1655-±
4 x SPST NO
T1655-±
4 x SPST NC/NO
T1655-±
*EP = Exposed paddle.
Devices are available in lead-free packaging.
________________________________________________________________ Maxim Integrated Products
1
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.