MAX13085

Product Catgories

Short Description:

The MAX13085 is a half-duplex high speed transceiver for RS-485 and RS422 communication. IC contains one driver and one receiver. The MAX13085 has a fail-safe circuit. It has a slew-rate-limited driver that reduces EMI and reflection due to improperly matched terminal cables, and achieves error-free data transmission of up to 2Mbps. Each driver output and receiver input is protected against ±15kV electrostatic discharge (HBM) (ESD)shocks. The MAX13085 receiver has 1/8 unit load input impedance, allows up to 256 devices can be attached to the bus. Mainly used in RS-485/RS-422 communication system.

Tags: Communication circuit, RS-485 Transceivers, Transceiver IC

Product Detail

Features

I/O pin ESD protection：+15kV HBM
Other pins have level 3 ESD protection：>+8kV HBM
Fractional unit load allows up to 256 devices on the bus
+ 5V operating voltage (For + 3.3v power supply, recommend the maximum transmission
rate is 500Kbps)
Data transmission up to 2Mbps
Low current shutdown mode operating current：1nA
Current limiting and thermal turn-off function can be used for driver overload protection
SOP8 and DIP8 package

Application

Intelligent instrument
Industrial process control
Building automation network
Motor control
EMI sensitive transceiver application

Parameter table

Order Information

Part No	Package	Manner of Packing	Devices per bag/reel
MAX13085	SOP8	Reel	2500

Pin Description

Pin No.	Pin Name	Description	I/O
1	RO	Receiver output：If A-B≥-0.05V，RO will be high；If A-B≤-0.2V，RO will be low；If A and B are open or shorted，RO will be high.	O
2	RE	Receiver output enable：RO is enabled when RE is low；RO is high impedance when RE is high.	I
3	DE	Driver output enable：The driver outputs，A and B are enabled by bringing DE high. They are high impedance when DE is low.	I
4	DI	Driver input：A low on DI forces output A low and output B high. Similarly, a high on DI forces output A high and output B low.	I
5	GND	Ground
6	A	Receiver input and driver output	I/O
7	B	Receiver input and driver output	I/O
8	VDD	Supply voltage

Truth Table

Input			Output
RE	DE	A – B	RO
L	X	≥-0.05V	H
L	X	≤-0.2V	L
L	X	Open/shorted	H
H	H	X	Z
H	L	X	Z

Truth Table

Input			Output
RE	DE	DI	B	A
X	H	H	L	H
X	H	L	H	L
L	L	X	Z	Z
H	L	X	Z

Absolute Maximum Ratings

Parameter	Symbol	Value	Unit
Supply Voltage	V DD	-0.3~7	V
Input / Output Voltage	V /V IN OUT	GND-0.3~V +0.3 DD	V
A/B Input / Output Voltage	V /V INA/B OUTA/B	-13~13	V
Operating Temperature	T amb	-40~85	℃
Storage Temperature	T	-65~150	℃

Electrical Characteristics

Parameter	Symbol	Test Conditions		Min	Typ	Max	Unit
Driver
Differential driver output	V OD1	No load				5	V
Differential driver output	V OD2	R=50Ω（RS-422）(1)		2.0			V
		R=27Ω（RS-485）(1)		1.5			V
Change in magnitude of driver differential output voltage for complementary output states	ΔV OD	R=50Ω or 27Ω(1)			0.01	0.2	V
Driver common-mode output voltage	V OC	R=50Ω or 27Ω(1)				3	V
Change in magnitude of driver common-mode output voltage for complementary output states	ΔV OC	R=50Ω or 27Ω(1)			0.01	0.2	V
Input high voltage	V IH1	DE、RE、DI		2.0			V
Input low voltage	V IL1	DE、RE、DI				0.8	V
Input current	I IN1	DE、RE、DI		-2		2	A
Input current (A, B)	I IN2	DE=GND，V =GND DD or 5.25V	Vin=12V			125	A
			Vin=-7V			-75	A
Driver short-circuit current	I OD1	-7V≤V ≤V OUT DD		-250			mA
		0V≤V ≤12V OUT				250	mA
		0V≤V ≤V OUT DD		±25			mA
Receiver
Differential threshold voltage	V TH	-7V≤V ≤12V CM		-200	-125	-50	mV
input hysteresis voltage	ΔV TH				25		mV
output high voltage	V OH	I =-4mA，V =-50mV O ID		3.5			V
output low voltage	V OL	I =4mA，V =-200mV O ID				0.4	V
3-state(high impedance) output current at receiver	I OZR	0.4V≤V ≤2.4V O				1	A
input resistance	R IN	-7V≤V ≤12V CM		96			kΩ
Receiver short-circuit current	I OSR	0V≤V ≤V RO DD		7		95	mA
Supply Current	I CC	No load，RE=DI	DE=V DD		430	900	A

			DE=GND	375	600	A
Supply Current in Shutdown	I SHDN	DE=GND，RE=V DD		0.00 1	10	A
ESD Protection（A/B）	ESD	Human Body Model		15		kV

Electrical Characteristics

Parameter	Symbol	Test Conditions	Min.	Typ.	Max.	Unit
slew-rate-limited
Driver Input to Output	t DPLH	R =54Ω，DIFF C =C =100pF(2) L1 L2	250	720	1000	ns
Driver Input to Output	t DPHL	R =54Ω，DIFF C =C =100pF(2) L1 L2	250	720	1000	ns
\|t -t \| DPLH DPHL	t DSKEW	R =54Ω，DIFF CL1=CL2=100pF(2)		-3	100	ns
Driver Rise or Fall Time	t, t DR DF	R =54Ω，DIFF C =C =100pF(2) L1 L2	200	530	750	ns
Maximum Data Rate	f MAX			2000		kbps
Driver Enable to Output High	t DZH	C =100pF，S2 closed(3) L			2500	ns
Driver Enable to Output Low	t DZL	C =100pF，S1 closed(3) L			2500	ns
Driver Disable Time from Low	t DLZ	C =15pF，S1 closed(3) L			100	ns
Driver Disable Time from Low	t DHZ	C =15pF，S2 closed(3) L			100	ns
Receiver Input to Output	t RPLH	\|V \|≥2.0V ID Rise or Fall Time≤15ns(4)		127	200	ns
Receiver Input to Output	t RPHL			127	200	ns
\|t -t \| RPLH RPHL	t RSKD	\|V \|≥2.0V ID Rise or Fall Time≤15ns(4)		3	30	ns
Receiver Enable to Output Low	t RZL	C =100pF，S1 closed(5) L		20	50	ns
Receiver Enable to Output High	t RZH	C =100pF，S2 closed(5) L		20	50	ns
Receiver Disable Time from Low	t RLZ	C =100pF，S1 closed(5) L		20	50	ns
Receiver Disable Time from High	t RHZ	C =100pF，S2 closed(5) L		20	50	ns
Time to Shutdown	t SHDN		50	200	600	ns

Driver Enable from Shutdown to Output High	t DZH(SHDN)	C =15pF，S2 closed(3) L			4500	ns
Driver Enable from Shutdown to Output Low	t DZL(SHDN)	C =15pF，S1 closed(3) L			4500	ns
Receiver Enable from Shutdown to Output High	t RZH(SHDN)	C =100pF，S2 closed(3) L			3500	ns
Receiver Enable from Shutdown to Output Low	t RZL(SHDN)	C =100pF，S1 closed(3) L			3500	ns
No slew-rate-limited
Driver Input to Output	t DPLH	R =54Ω，DIFF C =C =100pF(2) L1 L2		34	60	ns
Driver Input to Output	t DPHL	R =54Ω，DIFF C =C =100pF(2) L1 L2		34	60	ns
\|t -t \| DPLH DPHL	t DSKEW	R =54Ω，DIFF CL1=CL2=100pF(2)		-2.5	10	ns
Driver Rise or Fall Time	t, t DR DF	R =54Ω，DIFF C =C =100pF(2) L1 L2		14	25	ns
Maximum Data Rate	f MAX		10			Mbps
Driver Enable to Output High	t DZH	C =100pF，S2 closed(3) L			150	ns
Driver Enable to Output Low	t DZL	C =100pF，S1 closed(3) L			150	ns
Driver Disable Time from Low	t DLZ	C =15pF，S1 closed(3) L			100	ns
Driver Disable Time from Low	t DHZ	C =15pF，S2 closed(3) L			100	ns
Receiver Input to Output	t RPLH	\|V \|≥2.0V ID Rise or Fall Time≤15ns(4)		106	150	ns
Receiver Input to Output	t RPHL			106	150	ns
\|t -t \| RPLH RPHL	t RSKD	\|V \|≥2.0V ID Rise or Fall Time≤15ns(4)		0	10	ns
Receiver Enable to Output Low	t RZL	C =100pF，S1 closed(5) L		20	50	ns
Receiver Enable to Output High	t RZH	C =100pF，S2 closed(5) L		20	50	ns
Receiver Disable Time from Low	t RLZ	C =100pF，S1 closed(5) L		20	50	ns
Receiver Disable Time from High	t RHZ	C =100pF，S2 closed(5) L		20	50	ns
Time to Shutdown	t SHDN		50	200	600	ns

Driver Enable from Shutdown to Output High	t DZH(SHDN)	C =15pF，S2 closed(3) L	250	ns
Driver Enable from Shutdown to Output Low	t DZL(SHDN)	C =15pF，S1 closed(3) L	250	ns
Receiver Enable from Shutdown to Output High	t RZH(SHDN)	C =100pF，S2 closed(3) L	3500	ns
Receiver Enable from Shutdown to Output Low	t RZL(SHDN)	C =100pF，S1 closed(3) L	3500	ns

MAX13085

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Short Description:

Product Detail

Parameter table

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MAX13085

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Short Description:

Product Detail

Parameter table

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