MAX4520

Features:

. ±40V Fault Protection with Power Off
  ±36V Fault Protection with ±15V Supplies
. Switch is Off with Power Removed
. Rail-to-Rail Signal Handling
. 160Ωmax Signal Paths with ±15V Supplies
. On-Switch Turns Off with Overvoltage
. 0.5nA Off-Leakage Current
. Output Clamped to Appropriate Supply Voltage
  During Fault Condition; No Transition Glitch
. No Power-Supply Sequencing Required
. ±4.5V to ±20V Dual Supplies
  +9V to +36V Single Supply
. Low Power Consumption: <2mW
. TTL- and CMOS-Compatible Logic Inputs with
   Single +9V to +15V or ±15V Supplies 


Application

Data Acquisition
Industrial and Process-Control Systems
Avionics
ATE Equipment
Redundant/Backup Systems 


Pinout




Specifications

ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND)
V+........................................................................-0.3V to +44.0V
V-.........................................................................-44.0V to +0.3V
V+ to V-................................................................-0.3V to +44.0V
COM, IN (Note 1)..................................(V- - 0.3V) to (V+ + 0.3V)
NC, NO (Note 2).....................................(V+ - 36V) to (V- + 36V)
NC, NO to COM.......................................................-36V to +36V
Continuous Current into Any Terminal..............................±30mA
Peak Current into Any Terminal
(pulsed at 1ms, 10% duty cycle)...................................±50mA
Continuous Power Dissipation (TA= +70°C) (Note 2)
6-Pin SOT23-6 (derate 7.1mW/°C above +70°C).........696mW
8-Pin µMAX (derate 4.10mW/°C above +70°C)............330mW
Operating Temperature Ranges
MAX45_0EUT....................................................-40°C to +85°C
MAX45_0EUA...................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C


Description

  The MAX4510/MAX4520 single-pole/single-throw (SPST),fault-protected analog switches feature a fault-protected input and Rail-to-Rail®signal-handling capability. Thenormally open (NO) and normally closed (NC) terminals are protected from overvoltage faults up to 36V duringpower-on and 44V with power off. During a fault condi- tion, the switch input terminal (NO or NC) becomes anopen circuit; only nanoamperes of leakage current flow from the fault source, and the switch output (COM) fur-nishes up to 13mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-railoutputs when a fault begins and ends. On-resistance is 160Ωmax. The off-leakage current isonly 0.5nA at +25°C and 10nA at +85°C. The MAX4510is a normally closed switch, while the MAX4520 is anormally open switch. These CMOS switches operatewith dual power supplies ranging from ±4.5V to ±20V or a single supply between +9V and +36V.

The digital input has +0.8V and +2.4V logic thresholds,ensuring both TTL- and CMOS-logic compatibility when using ±15V or a single +12V supply. The MAX4510/MAX4520 are available in 6-pin SOT23 and 8-pin µMAXpackages.