19-3951; Rev 2; 1/07
High-Bandwidth, T1/E1, SPST Analog Switches
General Description
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
±3.3V 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 3.7Ω 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.
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.
Features
♦
Quad-SPST NO, NC, and NC/NO 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
= 3.7Ω (typ) and 6Ω
(max)
♦
Over 550MHz, -3dB 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 +85°C Extended Temperature Range
♦
Space-Saving, 16-Pin, 5mm x 5mm Thin QFN
MAX4815/MAX4816/MAX4817
Applications
NC2
Pin Configurations
V+
TOP VIEW
NC3
9
N.C.
10
T1/E1 Redundancy Switching
Base Stations and Base-Station Controllers
Add and Drop Multiplexers
Multiservice Provisioning Platforms
Edge Routers
Multiservice Switches (MSSs)
Digital Loop Carriers
Industrial Applications
Data Acquisition
Telecom Signal Switching
Test Equipment
Avionics
12
11
COM2
IN2
IN1
COM1
13
14
8
7
COM3
IN3
IN4
COM4
MAX4815
15
16
6
+
*EP
5
1
NC1
2
V-
3
GND
4
NC4
THIN QFN (5mm x 5mm)
*EXPOSED PADDLE CONNECTED TO V-
Pin Configurations continued at end of data sheet.
Ordering Information
PART
MAX4815ETE+
MAX4816ETE+
MAX4817ETE+
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
4 x SPST NC
4 x SPST NO
4 x SPST NC/NO
PKG CODE
T1655-3
T1655-3
T1655-3
*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.
High-Bandwidth, T1/E1, SPST Analog Switches
MAX4815/MAX4816/MAX4817
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_ ................................................................-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 (T
A
= +70°C)
16-Pin Thin QFN 5mm x 5mm (derate 33.3mW/°C
above +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%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
ANALOG SWITCH
Fault-Free Analog Signal Range
V
COM_
V
NO_
V
NC_
V+ = +3V, V- = -3V,
I
COM_
= 30mA,
V
NO_
or V
NC_
= +3V
V+ = +3V, V- = -3V,
I
COM_
= 30mA,
V
NO_
or V
NC_
= +3V
V+ = +3V, V- = -3V,
I
COM_
= 30mA;
V
NO_
or V
NC_
= -3V,
0V, +3V
V+ = +3.6V, V- = -3.6V;
V
COM_
= -3V, +3V;
V
NO_
or V
NC_
= +3V, -3V
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
0.4
0.1
V-
V+
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
3.7
5
Ω
6
0.6
Ω
0.8
1.2
Ω
1.5
On-Resistance (Note 2)
R
ON
On-Resistance Match
Between Channels (Notes 2, 3)
ΔR
ON
On-Resistance Flatness
(Notes 2, 4)
R
FLAT(ON)
NO or NC Off-Leakage
Current
I
NO_(OFF)
I
NC_(OFF)
-10
+10
nA
COM Off-Leakage Current
V+ = +3.6V, V- = -3.6V;
I
COM_(OFF)
V
COM_
= -3V, +3V;
V
NO_
or V
NC_
= +3V, -3V
V+ = +3.6V, V- = -3.6V;
V
COM_
= -3V, +3V;
NO_ or NC_ unconnected
-10
+10
nA
COM On-Leakage Current
FAULT
Fault Analog Signal Range
I
COM_(ON)
-15
+15
nA
V
COM_
V+ = +3.3V, V- = -3.3V
-11
+11
V
2
_______________________________________________________________________________________
High-Bandwidth, T1/E1, SPST Analog Switches
ELECTRICAL CHARACTERISTICS—Dual ±3.3V Supplies (continued)
(V+ = +3.3V ±10%, V- = -3.3V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
NO or NC Off-Leakage Current
COM Off-Leakage Current
SYMBOL
I
NO_
I
NC_
I
COM_
CONDITIONS
V+ = +3.3V, V- = -3.3V; V
NO_
or
V
NC_
= +11V, -11V; V
COM_
= -5.5V, +5.5V
V+ = +3.3V, V- = -3.3V; V
COM_
= +11V, -11V;
V
NO_
or V
NC_
= -5.5V, +5.5V
R
L
= 50Ω, f = 1.024MHz, Figure 4
R
L
= 50Ω, f = 30MHz, Figure 4
V
COM_
to V
NO_
or V
NC_
,
R
L
= 50Ω, f = 1.024MHz, Figure 4
V
COM_
to V
NO_
or V
NC_
,
R
L
= 50Ω, f = 30MHz, Figure 4
R
S
= R
L
= 50Ω, Figure 4
MIN
-1
-1
TYP
MAX
+1
+1
UNITS
µA
µA
MAX4815/MAX4816/MAX4817
SWITCH DYNAMIC CHARACTERISTICS
Crosstalk (Note 5)
V
CT1
V
CT2
V
ISO1
Off-Isolation (Note 6)
V
ISO2
On-Channel -3dB Bandwidth
COM On-Capacitance
COM Off-Capacitance
NC/NO Off-Capacitance
Charge Injection
Fault Recovery Time
Turn-On Time
BW
110
77
60
dB
30
550
10
7
7
55
128
20
40
µs
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
128
0.8
2.4
V
IN
= 0 or V+
-1
+1
0.5
40
1
µs
1
µs
V
V
µA
MHz
pF
pF
pF
pC
µs
dB
C
ON(COM_)
f = 1MHz, Figure 5
C
OFF(COM_)
f = 1MHz, Figure 5
C
OFF
Q
t
REC
t
ON
f = 1MHz, Figure 5
C
L
= 1.0nF, V
GEN
= 0, R
GEN
= 0, Figure 3
V
NO_
, V
NC_
, V
COM_
= -11V
V
NO_
or V
NC_
= +3V,
R
L
= 300Ω,
C
L
= 35pF, Figure 2
V
NO_
or V
NC_
= +3V,
R
L
= 300Ω,
C
L
= 35pF, Figure 2
T
A
= +25°C
Turn-Off Time
Power-Up Delay
LOGIC INPUT (IN_)
Input-Voltage Low
Input-Voltage High
Input Leakage Current
POWER SUPPLY
Quiescent Positive Supply
Current
Quiescent Negative Supply
Current
Negative Supply Voltage
Positive Supply Voltage
t
OFF
t
DEL
V
IL
V
IH
I
IN
I+
I-
V-
V+
V+ = +3.6V, V- = -3.6V, V
IN_
= 0 or V+
V+ = +3.6V, V- = -3.6V, V
IN_
= 0 or V+
-3.6
3.0
0.8
0.8
2
2
-3.0
3.6
mA
mA
V
V
_______________________________________________________________________________________
3
High-Bandwidth, T1/E1, SPST Analog Switches
MAX4815/MAX4816/MAX4817
ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies
(V+ = +5V ±10%, V- = -5V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
ANALOG SWITCH
Fault-Free Analog Signal Range
V
COM_
V
NO_
V
NC_
R
ON
V+ = +4.5V, V- = -4.5V,
I
COM_
= 30mA,
V
NO_
or V
NC_
= +3V
V+ = +4.5V, V- = -4.5V,
I
COM_
= 30mA,
V
NO_
or V
NC_
= +3V
V+ = +4.5V, V- = -4.5V,
I
COM_
= 30mA;
V
NO_
or V
NC_
= -3V, 0V,
+3V
V+ = +5.5V, V- = -5.5V;
V
COM_
= -5V, +5V;
V
NO_
or V
NC_
= +5V, -5V
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
-10
0.4
0.1
V-
3.7
V+
5
6
0.6
0.8
1.2
Ω
1.5
Ω
Ω
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
On-Resistance (Note 2)
On-Resistance Match
Between Channels (Notes 2, 3)
ΔR
ON
On-Resistance Flatness
(Notes 2, 4)
R
FLAT(ON)
NO or NC Off-Leakage
Current
I
NO_(OFF)
I
NC_(OFF)
+10
nA
COM Off-Leakage Current
V+ = +5.5V, V- = -5.5V;
I
COM_(OFF)
V
COM_
= -5V, +5V;
V
NO_
or V
NC_
= +5V, -5V
V+ = +5.5V, V- = -5.5V;
V
COM_
= -5V, +5V;
NO_ or NO_ unconnected
-10
+10
nA
COM On-Leakage Current
FAULT
Fault Analog Signal Range
I
COM_(ON)
-15
+15
nA
V
COM_
V
NO_
V
NC_
I
NO_
I
NC_
V+ = +5V, V- = -5V
-11
+11
V
NO or NC Off-Leakage Current
V+ = +5V, V- = -5V;
V
NO_
or V
NC_
= +11V, -11V;
V
COM_
= -5.5V, +5.5V
V+ = +5V, V- = -5V;
V
COM_
= +11V, -11V;
V
NO_
or V
NC_
= -5.5V, +5.5V
R
L
= 50Ω, f = 1.024MHz, Figure 4
R
L
= 50Ω, f = 30MHz, Figure 4
-1
+1
µA
COM Off-Leakage Current
I
COM_
-1
+1
µA
SWITCH DYNAMIC CHARACTERISTICS
Crosstalk (Note 5)
V
CT1
V
CT2
110
77
dB
4
_______________________________________________________________________________________
High-Bandwidth, T1/E1, SPST Analog Switches
ELECTRICAL CHARACTERISTICS—Dual ±5V Supplies (continued)
(V+ = +5V ±10%, V- = -5V ±10%, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
SYMBOL
V
ISO1
Off-Isolation (Note 6)
V
ISO2
On-Channel -3dB Bandwidth
COM On-Capacitance
COM Off-Capacitance
NC/NO Off-Capacitance
Charge Injection
Fault Recovery Time
Turn-On Time
BW
CONDITIONS
V
COM_
to V
NO_
or V
NC_
,
R
L
= 50Ω, f = 1.024MHz, Figure 4
V
COM_
to V
NO_
or V
NC_
,
R
L
= 50Ω, f = 30MHz, Figure 4
MIN
TYP
60
dB
30
550
10
7
7
55
128
20
40
40
0.5
1
1
128
0.8
2.4
V
IN
= 0 or V+
-1
+1
µs
µs
V
V
µA
µs
MHz
pF
pF
pF
pC
µs
MAX
UNITS
MAX4815/MAX4816/MAX4817
R
S
= R
L
= 50Ω, Figure 4
C
ON(COM_)
f = 1MHz, Figure 5
C
OFF(COM_)
f = 1MHz, Figure 5
C
OFF
Q
t
REC
t
ON
f = 1MHz, Figure 5
C
L
= 1.0nF, V
GEN
= 0, R
GEN
= 0, Figure 3
V
NO_
, V
NC_
, V
COM_
= -11V
V
NO_
or V
NC_
= +3V,
R
L
= 300Ω,
C
L
= 35pF, Figure 2
V
NO_
or V
NC_
= +3V,
R
L
= 300Ω,
C
L
= 35pF, Figure 2
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
T
A
= +25°C
T
A
= T
MIN
to
T
MAX
Turn-Off Time
Power-Up Delay
LOGIC INPUT (IN_)
Input-Voltage Low
Input-Voltage High
Input Leakage Current
POWER SUPPLY
Quiescent Positive Supply
Current
Quiescent Negative Supply
Current
Negative Supply Voltage
Positive Supply Voltage
t
OFF
t
DEL
V
IL
V
IH
I
IN
I+
I-
V-
V+
V+ = +5.5V, V- = -5.5V, V
IN_
= 0 or V+
V+ = +5.5V, V- = -5.5V, V
IN_
= 0 or V+
-5.5
4.5
0.9
0.9
2
2
-4.5
5.5
mA
mA
V
V
Note 1:
Note 2:
Note 3:
Note 4:
All parameters are production tested at T
A
= +85°C and guaranteed by design over specified temperature range.
Guaranteed by design, not production tested.
ΔR
ON
= R
ON(MAX)
- R
ON(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:
Off-isolation = 20 x log
10
[V
COM_
/(V
NC_
or V
NO_
)], V
COM_
= output, V
NC_
or V
NO_
= input to OFF switch.
_______________________________________________________________________________________
5
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