MAX13488E

Half-Duplex RS-485/RS-422 Transceiver

The MAX13488E is a half-duplex rs-485/rs-422 transceiver from Maxim Integrated. View the full MAX13488E datasheet below including electrical characteristics, absolute maximum ratings.

Manufacturer

Maxim Integrated

Overview

Part: MAX13487E/MAX13488E — Maxim Integrated Type: Half-Duplex RS-485/RS-422 Transceiver Description: +5V, ±15kV ESD-protected, half-duplex RS-485/RS-422-compatible transceivers with AutoDirection control and hot-swap capability, supporting data rates up to 500kbps (MAX13487E) or 16Mbps (MAX13488E).

Operating Conditions:

Supply voltage: 4.75–5.25 V
Operating temperature: -40 to +85 °C
Max data rate: 500kbps (MAX13487E), 16Mbps (MAX13488E)

Absolute Maximum Ratings:

Max supply voltage: +6 V
Max junction temperature: +150 °C
Max storage temperature: -65 to +150 °C

Key Specs:

Differential Driver Output (RDIFF = 100 Ω): 2.0 V min
Driver Short-Circuit Output Current (0V ≤ VOUT ≤ +12V): +50 mA min, +250 mA max
Receiver Input Current (A and B, VIN = +12V): 250 μA max
Receiver Differential Threshold Voltage: -200 mV min, +200 mV max
Receiver Input Hysteresis: 25 mV typ
Receiver Input Resistance: 48 kΩ min
Supply Current (SHDN = 1, RE = 0, no load): 4.5 mA max
Shutdown Supply Current (SHDN = 0): 10 μA max
ESD Protection (A, B, Human Body Model): ±15 kV

Features:

AutoDirection control
Hot-swap capability
Extended ESD protection for RS-485 I/O pins (±15kV Human Body Model)
Reduced slew-rate drivers for EMI reduction (MAX13487E)
High-speed version for up to 16Mbps (MAX13488E)
1/4-unit load receiver input impedance (up to 128 transceivers on bus)

Applications:

Isolated RS-485 Interfaces
Utility Meters
Industrial Controls
Industrial Motor Drives
Automated HVAC Systems

Package:

8-pin SO

Features

AutoDirection Saves Space and BOM Cost
AutoDirection Enables Driver Automatically on Transmission, Eliminating an Opto or Other Discrete Means of Isolation
8-Pin SO Package
Robust Protection Features for Telecom, Industrial, and Isolated Applications
Hot-Swap Capability to Eliminate False Transitions on the Bus During Power-Up or Live Insertion
Extended ESD Protection for RS-485 I/O Pins (±15kV Human Body Model)
Options Optimize Designs for Speed or Errorless Data Transmission
Enhanced Slew-Rate Limiting Facilitates ErrorFree Data Transmission (MAX13487E)
High-Speed Version (MAX13488E) Allows for Transmission Speeds Up to 16Mbps
1/4-Unit Load, Allowing Up to 128 Transceivers on the Bus

Applications

Isolated RS-485 Interfaces

Utility Meters

Industrial Controls

Industrial Motor Drives

Automated HVAC Systems

Pin Configuration

PIN	NAME	FUNCTION
1	RO	Receiver Output. When receiver is enabled and V(A) - V(B) > +200mV, RO is high. If V(A) - V(B) < -200mV, RO is low.
2	RE	Receiver Output Enable. Drive RE low to enable the RO. Drive RE high to let the AutoDirection circuit control the receiver. RE is a hot-swap input (see the Hot-Swap Capability section for more details).
3	SHDN	Shutdown. Drive SHDN high to let the device operate in normal operation. Drive SHDN low to put the part in shutdown.
4	DI	Driver Input. Drive DI low to force noninverting output low and inverting output high. Drive DI high to force noninverting output high and inverting output low. DI is an input to the internal state machine that automatically enables and disables the driver. See the Function Tables and General Description for more information. DI is a hot-swap input (see the Hot-Swap Capability section for more details).
5	GND	Ground
6	A	Noninverting Receiver Input and Noninverting Driver Output
7	B	Inverting Receiver Input and Inverting Driver Output
8	V CC	Positive Supply, V CC = +5V ±5%. Bypass V CC to GND with a 0.1μF capacitor.

Electrical Characteristics

(VCC = +5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) (Note 1)

PARAMETER	SYMBOL	CONDITIONS	CONDITIONS	MIN	TYP	MAX	UNITS
DRIVER
Differential Driver Output	V OD	R DIFF = 100 Ω , Figure 1	R DIFF = 100 Ω , Figure 1	2.0		V CC	V
Differential Driver Output	V OD	R DIFF = 54 Ω , Figure 1	R DIFF = 54 Ω , Figure 1	1.5			V
Differential Driver Output	V OD	No load	No load			V CC	V
Driver Common-Mode Output Voltage	V OC	R L = 100 Ω or 54 Ω , Figure 1	R L = 100 Ω or 54 Ω , Figure 1		V CC / 2	3	V
Driver Disable Threshold	V DT	Figure 2 (Note 2)	Figure 2 (Note 2)	+0.6		+1	V
Input-High Voltage	V IH	DI, SHDN , RE	DI, SHDN , RE	2.0			V
Input-Low Voltage	V IL	DI, SHDN , RE	DI, SHDN , RE			0.8	V
Input Current	I IN	DI, SHDN , RE	DI, SHDN , RE			±1	μA
Driver Short-Circuit Output Current	I OSD	0V ≤ V OUT ≤ +12V	0V ≤ V OUT ≤ +12V	+50		+250	mA
(Note 3)	I OSD	-7V ≤ V OUT ≤ 0V	-7V ≤ V OUT ≤ 0V	-250		-50	mA
Driver Short-Circuit Foldback Output Current (Note 3)	I OSDF	(V CC - 1V) ≤ V OUT ≤ +12V	(V CC - 1V) ≤ V OUT ≤ +12V	20			mA
Driver Short-Circuit Foldback Output Current (Note 3)	I OSDF	-7V ≤ V OUT ≤ 0V	-7V ≤ V OUT ≤ 0V			-20
RECEIVER
Input Current (A and B)	I A, B	DI = V CC , V CC = GND or +5V	V IN = +12V			250	μA
Input Current (A and B)		DI = V CC , V CC = GND or +5V	V IN = -7V	-200			μA
Receiver Differential Threshold Voltage	V TH	-7V ≤ V CM ≤ +12V	-7V ≤ V CM ≤ +12V	-200		+200	mV
Receiver Input Hysteresis	∆ V TH	V A + V B = 0V	V A + V B = 0V		25		mV
Output-High Voltage	V OH	I O = -1.6mA, V A - V B > V TH	I O = -1.6mA, V A - V B > V TH	V CC - 1.5			V
Output-Low Voltage	V OL	I O = 1mA, V A - V B < -V TH	I O = 1mA, V A - V B < -V TH			0.4	V
Tri-State Output Current at Receiver	I OZR	0V ≤ V O ≤ V CC	0V ≤ V O ≤ V CC			±1	μA
Receiver Input Resistance	R IN	-7V ≤ V CM ≤ +12V	-7V ≤ V CM ≤ +12V	48			k Ω
Receiver Output Short-Circuit Current	I OSR	0V ≤ V RO ≤ V CC	0V ≤ V RO ≤ V CC	±7		±95	mA

Absolute Maximum Ratings

Supply Voltage V CC ...............................................................+6V
SHDN , RE , DI..............................................................-0.3V to +6
A, B........................................................................... -8V to +13V
Short-Circuit Duration (RO, A, B) to GND..................Continuous
Continuous Power Dissipation (T A = +70°C) 8-Pin SO (derate 5.9mW/°C above +70°C)..................471mW
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C

Stresses beyond those listed under 'Absolute Maximum Ratings' may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Typical Application

The MAX13487E/MAX13488E transceivers are designed for half-duplex, bidirectional data communications on multipoint bus transmission lines. Figure 11 shows a typical network application. To minimize reflections, terminate the line at both ends in its characteristic impedance, and keep stub lengths off the main line as short as possible. The slew-rate-limited MAX13487E is more tolerant of imperfect termination.

Package Information

For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . Note that a '+', '#', or '-' in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

PACKAGE TYPE	PACKAGE CODE	OUTLINE NO.	LAND PATTERN NO.
8 SO	S8+2	21-0041	90-0096

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
MAX13487E	Maxim Integrated	—
MAX13487EESA+T	Maxim Integrated	8-pin SO
MAX1348X	Maxim Integrated	—

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