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參數資料
| 型號： | MAX378 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Voltage, Fault-Protected Analog Multiplexers(高壓、故障保護模擬多路轉換器) |
| 中文描述： | 8通道、高電壓、故障保護多路復用器 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 142K |
| 代理商： | MAX378 |
_______________General Desc ription
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.
________________________Applic ations
Data Acquisition Systems
Industrial and Process Control Systems
Avionics Test Equipment
Signal Routing Between Systems
____________________________Features
o
Fault Input Voltage ±75V with Power Supplies Off
o
Fault Input Voltage ±60V with ±15V Power Supplies
o
All Switches Off with Power Supplies Off
o
On Channel Turns OFF if Overvoltage Occurs on
Input or Output
o
Only Nanoamperes of Input Current Under All
Fault Conditions
o
No Increase in Supply Currents Due to Fault
Conditions
o
Latchup-Proof Construction
o
Operates from ±4.5V to ±18V Supplies
o
All Digital Inputs are TTL and CMOS Compatible
o
Low-Power Monolithic CMOS Design
______________Ordering Information
Ordering Information continued at end of data sheet.
* Contact factory for availability.
**The substrate may be allowed to float or be tied to V+ (J I CMOS).
M
High-Voltage, Fault-Protec ted
Analog Multiplexers
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
A2
GND
V+
IN1
V-
EN
A0
TOP VIEW
MAX378
IN5
IN6
IN7
IN8
OUT
IN4
IN3
IN2
DIP
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
A1
GND
V+
IN1B
IN1A
V-
EN
A0
MAX379
IN2B
IN3B
IN4B
OUTB
OUTA
IN4A
IN3A
IN2A
DIP
__________________________________________________________Pin Configurations
19-1902; Rev 1; 8/94
PART
MAX378
CPE
MAX378CWG
MAX378CJ E
MAX378C/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
16 Plastic DIP
24 Wide SO
16 CERDIP
Dice**
MAX378EPE
MAX378EWG
MAX378EJ E
MAX378MJ E
MAX378MLP
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
16 Plastic DIP
24 Wide SO
16 CERDIP
16 CERDIP
20 LCC*
-55°C to +125°C
-55°C to +125°C
Pin Configurations continued at end of data sheet.
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