MAX4631, MAX4632, MAX4633 故障保护、高电压、双路模拟开关

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The MAX4631/MAX4632/MAX4633 high-voltage, dual analog switches are pin compatible with the industry-standard DG401/DG403/DG405. They upgrade the existing devices with fault-protected inputs and rail-to-rail signal handling capabilities. The MAX4631/MAX4632/MAX4633's normally open (NO) and normally closed (NC) terminals are protected from overvoltage faults up to 36V during power-up or power-down. During a fault condition, these terminals become open circuit and only nanoamperes of leakage current flow from the source, yet the switch output (COM_) continues to furnish up to 18mA of the appropriate polarity supply voltage to the load. This ensures unambiguous rail-to-rail outputs when a fault begins and ends. On-resistance is 85Ω (max) at +25°C and is matched between switches to 6Ω (max). Off-leakage current is only 0.5nA at +25°C and 5nA at +85°C.

The MAX4631 has two NO single-pole/single-throw (SPST) switches. The MAX4632 has two NO/NC single-pole/double-throw (SPDT) switches. The MAX4633 has two NO double-pole/single-throw (DPST) switches.

These CMOS switches operate with dual power supplies ranging from ±4.5V to ±18V or a single supply between +9V and +36V. All digital inputs have +0.8V and +2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±15V or a single +12V supply.

关键特性

应用/使用

Fault Protection
- ±40V with Power Off
- ±36V with ±15V Supplies (MAX4631/MAX4633)
- ±25V with ±15V Supplies (MAX4632)
Rail-to-Rail Signal Handling
No Power-Supply Sequencing Required
All Switches Off with Power Off
Output Clamped to Appropriate Supply Voltage During Fault Condition; No Transition Glitch
85Ω (max) Signal Paths with ±15V Supplies
±4.5V to ±18V Dual Supplies
+9V to +36V Single Supply
Low Power Consumption: <6mW
Pin Compatible with Industry-Standard DG401/DG403/DG405
TTL- and CMOS-Logic Compatible Inputs with Single +9V to +15V, or ±15V Supplies

	自动测试设备(ATE)
	航空电子
	数据采集
	工业与过程控制系统
	冗余/备份系统

Key Specifications: Switches and Multiplexers (Mid Voltage)

Part Number

Configuration

Number of Channels

Normally (Open/Closed)

V_SUPPLY, Single (min) (V)

V_SUPPLY, Single (max) (V)

V_SUPPLY, Dual (min) (±V)

V_SUPPLY, Dual (max) (±V)

R_ON (max) (Ω)

I_{L (OFF)} (max) (nA)

t_ON (max) (nS)

t_OFF (max) (nS)

Q_INJECTION (pC)

C_ON (pF)

C_OFF (pF)

Features

V_ISO, Off-Isolation (dB)

V_CT, Crosstalk (dB)

ΔR_ON (max) (Ω)

Fault Protection (±V)

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX4631

SPST

Open

4.5

0.5

500

400

•	Fault Protected

Yes

PDIP/16
SOIC/16

$1.54 @ 1k

MAX4632

SPDT

$1.54 @ 1k

MAX4633

DPST

Open

$1.69 @ 1k

See All Switches and Multiplexers (Mid Voltage) (284)

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.