MAX14840E：40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

Low-Voltage, High-Speed RS-485 Transceivers Increase Data Rates and Extend Cable Lengths

The MAX14840E/MAX14841E are +3.3V ESD-protected transceivers intended for half-duplex RS-485 communication up to 40Mbps. These transceivers are optimized for high speeds over extended cable runs while maximizing tolerance to noise. The MAX14840E features symmetrical fail-safe and larger receiver hysteresis, providing improved noise rejection and improved recovered signals in high-speed and long cable applications. The MAX14841E has true fail-safe receiver inputs guaranteeing a logic-high receiver output when inputs are shorted or open. The MAX14840E/MAX14841E are available in 8-pin SO and small, 8-pin (3mm x 3mm) TDFN-EP packages. Both devices operate over the -40°C to +125°C automotive temperature range.

Key Features

High ESD Protection Provides Increases Equipment Uptime
- ±35kV Human Body Model (HBM) per JEDEC JS-001-2012
- ±20kV Air Gap Discharge per IEC 61000-4-2
- ±12kV Contact Discharge per IEC 61000-4-2
Integrated Features Increases Robustness
- Large 170mV Receiver Hysteresis (MAX14840) for High Receiver Noise Tolerance
- True Fail Safe Receiver Input (MAX14841E) Keeps Receiver Output Logic-High Upon Shorts and Open On Receiver Input
- Thermal Self-Protection Shutdown at 160°C Junction Temperature
- High Industrial -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range
- Hot Swap Capability Eliminates False Transition During Power-Up or Hot Insertion
Low Current Reduces Power Requirements
- 10µA (max) Shutdown Current
- 1.5mA (typ) Supply Current
- 3.3V Supply Voltage
Available in Industry Standard 8-Pin SO or Space-Saving 8-Pin TDFN-EP (3mm x 3mm) Packages

MAX14840E, MAX14841E: Functional Diagram

Applications/Uses

Backplane Buses
Fieldbus Networks
HVAC Networks
Industrial Control Systems
Motion Controllers

DataSheet

title	Download file
MAX14840E-MAX14841E Data Sheet	MAX14840E-MAX14841E.pdf

Parametrics

Part Number	Tx/Rx	Duplex	V_SUPPLY (V)	I_CC (mA)	Data Rate (kbps)	ESD Protect. (±kV)	Tx EN	Rx EN	I_CC (Shutdn.) (µA)	Rx/Tx on Bus	Rx Failsafe w/ Inputs	Slew Rate Limiting	Oper. Temp. (°C)	Package/Pins	Budgetary Price
Part Number	Tx/Rx	Duplex	V_SUPPLY (V)	typ	min	ESD Protect. (±kV)	Tx EN	Rx EN	typ	Rx/Tx on Bus	Rx Failsafe w/ Inputs	Slew Rate Limiting	Oper. Temp. (°C)	Package/Pins	See Notes
MAX14840E	1Tx + 1Rx	Half	3.3	1.5	40000	35	Yes	Yes	10	32	Open	No	-40 to +125	SOIC(N)/8 TDFN-EP/8	$2.10 @1k
MAX14841E	1Tx + 1Rx	Half	3.3	1.5	40000	35	Yes	Yes	10	32	Open or Shorted	-	-40 to +125	SOIC(N)/8 TDFN-EP/8	$2.10 @1k

Design kits & evaluation modules

Quality and Environmental Data

MAX14840E.pdf

Ordering Information

Part Number	Status	Package	Temp	RoHS
MAX14840EASA+	Active	SOIC(N),;8 pin;30.9 mm²	-40°C to +125°C	Lead Free
MAX14840EASA+T	Active	SOIC(N),;8 pin;30.9 mm²	-40°C to +125°C	Lead Free
MAX14840EATA+	Active	TDFN-EP,;8 pin;9.6 mm²	-40°C to +125°C	Lead Free
MAX14840EATA+T	Active	TDFN-EP,;8 pin;9.6 mm²	-40°C to +125°C	Lead Free

MAX14840E-MAX14841E.pdf MAX14841E

MAX14840E.pdf MAX14840E