MAX378, MAX379 8-Channel, High-Voltage, Fault-Protected Multiplexers

Description

The MAX378 8-channel single-ended (1-of-8) multiplexer and the MAX379 4-channel differential (2-of-8) multiplexer use a series N-channel/P-channel/N-channel structure to provide significant fault protection. If the power supplies to the MAX378/MAX379 are inadvertently turned off while input voltages are still applied, all channels in the muxes are turned off, and only a few nanoamperes of leakage current will flow into the inputs. This protects not only the MAX378/MAX379 and the circuitry they drive, but also the sensors or signal sources that drive the muxes.

The series N-channel/P-channel/N-channel protection structure has two significant advantages over the simple current-limiting protection scheme of the industry's first-generation fault-protected muxes. First, the Maxim protection scheme limits fault currents to nanoamp leakage values rather than many milliamperes. This prevents damage to sensors or other sensitive signal sources. Second, the MAX378/MAX379 fault-protected muxes can withstand a continuous±60V input, unlike the first generation, which had a continuous ±35V input limitation imposed by power dissipation considerations.

All digital inputs have logic thresholds of 0.8V and 2.4V, ensuring both TTL and CMOS compatibility without requiring pull-up resistors. Break-before-make operation is guaranteed. Power dissipation is less than 2mW.

Key Features

Applications/Uses

Fault Input Voltage ±75V with Power Supplies Off
Fault Input Voltage ±60V with ±15V Power Supplies
All Switches Off with Power Supplies Off
On Channel Turns OFF if Overvoltage Occurs on Input or Output
Only Nanoamperes of Input Current Under All Fault Conditions
No Increase in Supply Currents Due to Fault Conditions
Latchup-Proof Construction
Operates from ±4.5V to ±18V Supplies
All Digital Inputs are TTL and CMOS Compatible
Low-Power Monolithic CMOS Design

	Avionics Test Equipment
	Data Acquisition
	Industrial and Process Control Systems
	Signal Routing Between Systems

Key Specifications: Switches and Multiplexers (Mid Voltage)

Part Number

Configuration

Number of Channels

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)

C_ON (pF)

C_OFF (pF)

Features

V_ISO, Off-Isolation (dB)

Fault Protection (±V)

RoHS Available

Industry Qualified

Package

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

Price^**

MAX378

8:1 Mux

4.5

3500

1,000

500

•	Chip Enable

Yes

MIL-STD-883B

Ceramic DIP/16
DICE SALES/0
LCC/20
PDIP/16
SOIC/24

$3.50 @ 1k

MAX379

4:1 Mux

Ceramic DIP/16
LCC/20
PDIP/16
SOIC/24

$3.50 @ 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.

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-39 of 39

MAX378

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX378CJE

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX378EJE

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX378MJE/883B

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX378MJE

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX378C/D

DICE SALES;0 pin;

Use pkgcode/variation: DICE*

See data sheet

MAX378MLP/883B

LCC;20 pin;83 mm²
Dwg: 21-0658B (PDF)
Use pkgcode/variation: L20-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX378MLP

LCC;20 pin;83 mm²
Dwg: 21-0658B (PDF)
Use pkgcode/variation: L20-3*

RoHS/Lead-Free: No
Materials Analysis

MAX378CPE+

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16+8*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX378EPE+

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16+8*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX378CPE

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16-8*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX378EPE

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16-8*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX378CWG+

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX378CWG+T

0°C to +70°C

See data sheet

MAX378EWG+

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24+3*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX378EWG+T

-40°C to +85°C

See data sheet

MAX378CWG-T

0°C to +70°C

See data sheet

MAX378CWG

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX378EWG-T

-40°C to +85°C

See data sheet

MAX378EWG

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX379

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX379C/D

See data sheet

MAX379CJE

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX379EJE

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX379MJE/HR

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX379MJE/883B

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX379MJE

Ceramic DIP;16 pin;173 mm²
Dwg: 21-0045A (PDF)
Use pkgcode/variation: J16-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX379MLP

LCC;20 pin;83 mm²
Dwg: 21-0658B (PDF)
Use pkgcode/variation: L20-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX379MLP/883B

LCC;20 pin;83 mm²
Dwg: 21-0658B (PDF)
Use pkgcode/variation: L20-3*

-55°C to +125°C

RoHS/Lead-Free: No
Materials Analysis

MAX379EPE+

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16+8*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX379CPE+

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16+8*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX379CPE

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16-8*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX379EPE

PDIP;16 pin;160 mm²
Dwg: 21-0043D (PDF)
Use pkgcode/variation: P16-8*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX379EWG+

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24+3*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX379EWG+T

-40°C to +85°C

See data sheet

MAX379CWG+T

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX379CWG-T

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX379CWG

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24-3*

0°C to +70°C

RoHS/Lead-Free: No
Materials Analysis

MAX379CWG+

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24+3*

0°C to +70°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX379EWG-T

-40°C to +85°C

See data sheet

MAX379EWG

SOIC;24 pin;166 mm²
Dwg: 21-0042B (PDF)
Use pkgcode/variation: W24-3*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis