MAX1480E-MAX1490E datasheet(10/19 Pages) MAXIM

Part #	MAX1480E-MAX1490E

Description	15kV ESD-Protected, Isolated RS-485/RS-422

Download	19 Pages

Scroll/Zoom	100%

Manufacturer	MAXIM [Maxim Integrated Products]

Direct Link	https://www.maximintegrated.com/en.html

Logo

10 / 19 page

±15kV ESD-Protected, Isolated RS-485/RS-422

Data Interfaces

10

______________________________________________________________________________________

The high-speed optocouplers on the MAX1480EA/

MAX1480EC/MAX1490EA consume an additional 10mA

through VCC5 (VCC4 for the MAX1490EA). Therefore, to

completely shut down these devices, use an external P-

channel MOSFET as shown in Figure 3. In normal opera-

tion, SD is low, turning the MOSFET on and thereby

providing power to all the VCC pins. When SD is pulled

high, the power oscillator is disabled and the switch is

turned off, disconnecting power from the DI and DE opto-

couplers. In normal operating mode, the switch carries

only the optocoupler currents, so an on-resistance of sev-

eral ohms does not significantly degrade efficiency.

AC1 (MAKE NO CONNECTION)

AC2 (MAKE NO CONNECTION)

SHIELD (OPTIONAL)

EXTERNAL RS-485/RS-422 WIRING

ISO VCC1

B

D2

D1

VCC2

VCC1

ISO RO DRV

A

B

A

SH

ISO DI IN

ISO DE IN

VCC3

SD

FS

GND1

ISO COM1

ISO DI DRV

ISO VCC2

ISO DE DRV

GND2

DE

VCC4

DI

ISO COM2

ISO RO LED

VCC5

RO

RL

R4*

R5*

R7

100

Ω

R1*

R2*

R3*

R6*

DE

´

DI

´

VIN

+5V

C1

22

µF

C2

0.1

µF

LOGIC GROUND

ISOLATION BARRIER

ISOLATED COMMON

DRIVER INPUT

DRIVER ENABLE

RECEIVER OUTPUT

DE

DI

RO

74HC86

OR EQUIVALENT

MAX1487E

MAX487E

MAX845E

1

2

28

27

3

4

5

6

7

8

9

10

11

12

13

14

26

25

24

23

22

21

20

19

18

17

16

15

MAX845E

N

MAX1480EA: MAX1487E

MAX1480EC: MAX487E

RE

ISO RO DRV

ISO DE IN

ISO DI IN

ISO COM1

ISO VCC1

A

B

R

D

N

Q

T F/F

VCC3

FS

OSC

1.07MHz/

1.45MHz

SD

GND1

D2

D1

SHIELD (OPTIONAL)

NOTE: RESISTOR R7 PROTECTS

THE MAX1480EA FROM TRANSIENT

CURRENTS BETWEEN SHIELD AND

TRANSMISSION LINES.

TWISTED PAIR

TO OTHER TRANSCEIVERS

TERMINATING RESISTOR

(ONE RESISTOR ON EACH END)

TWISTED PAIR

TO OTHER TRANSCEIVERS

*SEE TABLE 1.

MAX1480EA

MAX1480EC

270pF

4kV

Figure 1. MAX1480EA/MAX1480EC Detailed Block Diagram and Application Circuit

Table 1. Pullup and LED Drive Resistors for Figure 1

PART

R1 (

Ω)

R2 (

Ω)

R3 (

Ω)

MAX1480EA

MAX1480EC

200

1000

3000

R4 (

Ω)

4300

3000

R5 (

Ω)

1000

3000

R6 (

Ω)

200

Similar Part No. - MAX1480E-MAX1490E

Manufacturer	Part #	Datasheet	Description
Maxim Integrated Produc...	MAX1480	487Kb / 21P	Complete, Isolated RS-485/RS-422 Data Interface Rev 4; 10/03
	MAX14800	179Kb / 17P	Low-Charge Injection, 16-Channel, High-Voltage Analog Switches Rev 0; 4/09
	MAX14800	230Kb / 18P	Low-Charge Injection, 16-Channel, High-Voltage Analog Switches Rev 1; 9/09
	MAX14800CCM++	179Kb / 17P	Low-Charge Injection, 16-Channel, High-Voltage Analog Switches Rev 0; 4/09
	MAX14800CCM++	230Kb / 18P	Low-Charge Injection, 16-Channel, High-Voltage Analog Switches Rev 1; 9/09

More results

Similar Description - MAX1480E-MAX1490E

Manufacturer	Part #	Datasheet	Description
Maxim Integrated Produc...	MAX3480EA	280Kb / 16P	-15kV ESD-Protected, Isolated, 3.3V RS-485/RS-422 Data Interfaces Rev 0; 4/01
	MAX3095	195Kb / 11P	±15kV ESD-Protected, 10Mbps, 3V/5V, Quad RS-422/RS-485 Receivers Rev 2; 1/10
	MAX3095	198Kb / 11P	±15kV ESD-Protected, 10Mbps, 3V/5V,, Quad RS-422/RS-485 Receivers Rev 3; 1/10
	MAX13080E	343Kb / 24P	5.0V, 15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Rev 1; 4/05
	MAX13080E	287Kb / 24P	5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Rev 2; 11/11
	MAX3070E	723Kb / 24P	3.3V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceivers Rev 2; 4/09
	MAX13085E	2Mb / 14P	5.0V, ±15kV ESD-Protected, Fail-Safe,Hot-Swap, RS-485/RS-422 Transceiver Rev 0; 10/11
Exar Corporation	XR3160EIU-0A-EB	365Kb / 23P	RS-232/RS-485/RS-422 TRANSCEIVER WITH 15KV ESD PROTECTION
Maxim Integrated Produc...	MAX3160E	505Kb / 26P	±15kV ESD-Protected, 3.0V to 5.5V, 10nA, RS-232/RS-485/ RS-422 Multiprotocol Transceivers Rev 1; 5/15
Maxim Integrated Produc...	MAX481E	768Kb / 16P	±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers Rev 4; 10/03

More results

MAX1480E-MAX1490E Datasheet(PDF) 10 Page - Maxim Integrated Products

MAX1480E-MAX1490E Datasheet(HTML) 10 Page - Maxim Integrated Products

Similar Part No. - MAX1480E-MAX1490E

Similar Description - MAX1480E-MAX1490E

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Datasheet Download

Link URL