MAX378CPE Maxim Integrated Products, MAX378CPE Datasheet

MAX378CPE

Manufacturer Part Number

MAX378CPE

Description

Multiplexer Switch ICs

Manufacturer

Maxim Integrated Products

Type

Analog Multiplexerr

Datasheet

1.MAX378CPE.pdf (12 pages)

Specifications of MAX378CPE

Number Of Channels

1 Channel

On Resistance (max)

3500 Ohms at +/- 15 V

On Time (max)

1000 ns at +/- 15 V

Off Time (max)

300 ns (Typ) at +/- 15 V

Maximum Operating Temperature

+ 70 C

Minimum Operating Temperature

0 C

Package / Case

PDIP N

Mounting Style

Through Hole

Switch Current (typ)

0.2 mA at 15 V, - 0.01 mA at - 15 V

Lead Free Status / Rohs Status

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

MAX378CPE

Manufacturer:

MAXIM/美信

Quantity:

20 000

Current page: 1 of 12
Download datasheet (105Kb)

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 cur-

rent 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 protec-

tion scheme limits fault currents to nanoamp leakage

values rather than many milliamperes. This prevents dam-

age 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 requir-

ing pull-up resistors. Break-before-make operation is

guaranteed. Power dissipation is less than 2mW.

________________________Applications

19-1902; Rev 1; 8/94

Call toll free 1-800-998-8800 for free samples or literature.

_______________General Description

__________________________________________________________Pin Configurations

Pin Configurations continued at end of data sheet.

Data Acquisition Systems

Industrial and Process Control Systems

Avionics Test Equipment

Signal Routing Between Systems

OUT

IN1

IN2

IN3

IN4

V-

________________________________________________________________ Maxim Integrated Products

MAX378

DIP

GND

V+

IN5

IN6

IN7

IN8

High-Voltage, Fault-Protected

TOP VIEW

____________________________Features

Ordering Information continued at end of data sheet.

* Contact factory for availability.

**The substrate may be allowed to float or be tied to V+ (JI CMOS).

______________Ordering Information

MAX378CPE

MAX378CWG

MAX378CJE

MAX378C/D

MAX378EPE

MAX378EWG

MAX378EJE

MAX378MJE

MAX378MLP

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

PART

Analog Multiplexers

OUTA

IN1A

IN2A

IN3A

IN4A

V-

-40°C to +85°C

-55°C to +125°C

TEMP. RANGE

0°C to +70°C

MAX379

DIP

GND

V+

IN1B

IN2B

IN3B

IN4B

OUTB

16 Plastic DIP

24 Wide SO

16 CERDIP

Dice**

16 Plastic DIP

24 Wide SO

16 CERDIP

20 LCC*

PIN-PACKAGE

Related parts for MAX378CPE

MAX378CPE Summary of contents

Page 1

... 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 ______________Ordering Information PART MAX378CPE MAX378CWG MAX378CJE MAX378C/D MAX378EPE MAX378EWG MAX378EJE MAX378MJE MAX378MLP Ordering Information continued at end of data sheet. ...

Page 2

High-Voltage, Fault-Protected Analog Multiplexers ABSOLUTE MAXIMUM RATINGS Voltage between Supply Pins ..............................................+44V V+ to Ground ...................................................................+22V V- to Ground......................................................................-22V Digital Input Overvoltage: { V+......................................................................+ ........................................................................-4V Analog Input with Multiplexer Power On..............................±65V { } Recommended ...

Page 3

ELECTRICAL CHARACTERISTICS (continued) (V+ = +15V -15V; V (Logic Level High) = +2.4V PARAMETER SYMBOL DYNAMIC Access Time t A Break-Before-Make Delay OFF (Figure 2) Enable Delay (ON) t ON(EN) Enable Delay (OFF) ...

Page 4

High-Voltage, Fault-Protected Analog Multiplexers __________________________________________Typical Operating Characteristics INPUT LEAKAGE vs. INPUT VOLTAGE WITH 100 10 1 OPERATING RANGE 100n 10n 1n 100p 10p -100 - 100 V (V) IN NOTE: Typical R ...

Page 5

MAX358 3.0V AH ADDRESS DRIVE ( OUTPUT 50% 50% t OPEN Figure 2. Break-Before-Make Delay (t ) OPEN MAX378 3.0V AH ENABLE DRIVE 50% 0V 90% OUTPUT 90% t ON(EN) t OFF(EN) Figure ...

Page 6

High-Voltage, Fault-Protected Analog Multiplexers Truth Table—MAX378 ...

Page 7

Input switching, however, must be done with a fault- protected MAX378 multiplexer, to provide the level of protection and isolation required with most data acqui- sition inputs. Since external signal sources may contin supply voltage when the multiplexer ...

Page 8

High-Voltage, Fault-Protected Analog Multiplexers to-source voltage. The P-channel device (Q2), howev- er, has +60V V and is turned off, thereby preventing GS the input signal from reaching the output. If the input voltage is +60V, Q1 has a negative V ...

Page 9

Table 1b. MAX379 Charge Injection Injected Charge Supply Analog Voltage Input Level Out A Out B +1.7V +105pC +107pC ±5V 0V +73pC +74pC -1.7V +48pC +50pC +5V +215pC +220pC ±10V 0V +135pC +139pC -5V +62pC +63pC +10V +525pC +530pC ±15V ...

Page 10

High-Voltage, Fault-Protected Analog Multiplexers _____________________________________________Pin Configurations (continued N. N. MAX378 IN1 6 19 IN2 7 18 IN3 8 17 IN4 N.C. 14 ...

Page 11

Information (continued) PART TEMP. RANGE PIN-PACKAGE MAX379CPE 0°C to +70°C 16 Plastic DIP MAX379CWG 0°C to +70°C 24 Wide SO MAX379CJE 0°C to +70°C 16 CERDIP MAX379C/D 0°C to +70°C Dice** MAX379EPE -40°C to +85°C 16 Plastic DIP MAX379EWG ...

Page 12

... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 12 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...

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