MAX3444E

Part: MAX3440E–MAX3444E (ordered as MAX3485CSA+T per filename; datasheet covers MAX3440E/41E/42E/43E/44E) — Maxim Integrated

Type: Fault-Protected RS-485/J1708 Transceiver

Description: 5 V, ±15 kV ESD-protected, ±60 V fault-protected, fail-safe RS-485/J1708 transceivers with data rates up to 10 Mbps and support for up to 128 transceivers on a bus.

Operating Conditions:

• Supply voltage: 4.75–5.25 V
• Operating temperature: -40 to +85 °C (MAX344_EE_ ); -40 to +125 °C (MAX344_EA _)
• Common-mode input range: -7 V to +12 V

Absolute Maximum Ratings:

• Max supply voltage (VCC): 7 V
• A, B voltage: ±60 V (must be terminated with 54 Ω or 100 Ω)
• Control/logic pins: -0.3 V to (VCC + 0.3 V)
• Max junction temperature: +150 °C
• Storage temperature: -65 to +150 °C

Key Specs:

• Driver differential output VOD: ≥2 V (RL = 100 Ω), ≥1.5 V (RL = 54 Ω)
• Driver short-circuit output current: ±350 mA peak
• Receiver differential threshold: -200 to -50 mV (-7 V ≤ VCM ≤ +12 V)
• Receiver input resistance: ≥48 kΩ
• Supply current, normal operation: ≤30 mA (MAX3440E/42E/44E), ≤10 mA (MAX3441E/43E)
• Shutdown current: ≤20 μA (MAX3442E/43E), ≤100 μA (MAX3444E)
• Max data rate: 250 kbps (MAX3440E/42E/44E), 10 Mbps (MAX3441E/43E)
• Driver propagation delay: ≤60 ns (MAX3441E/43E), ≤2000 ns (MAX3440E/42E/44E)

Features:

• ±15 kV ESD protection
• ±60 V fault protection
• Hot-swap circuitry
• True fail-safe receiver inputs
• Slew-rate limiting on MAX3440E/42E/44E
• 1/4-unit-load receiver, up to 128 transceivers on the bus
• Short-circuit current limiting and thermal shutdown
• Industry-standard pinout

Applications:

• RS-422/RS-485 communications
• Industrial networks
• Telecommunications systems
• HVAC controls

Package:

• 8-pin SO
• 8-pin PDIP

• ±15kV ESD Protection
• ±60V Fault Protection
• Guaranteed 10Mbps Data Rate (MAX3441E/MAX3443E)
• Hot Swappable for Telecom Applications
• True Fail-Safe Receiver Inputs
• Enhanced Slew-Rate-Limiting Facilitates Error-Free Data Transmission (MAX3440E/MAX3442E/MAX3444E)
• Allow Up to 128 Transceivers on the Bus
• -7V to +12V Common-Mode Input Range
• Automotive Temperature Range (-40°C to +125°C)
• Industry-Standard Pinout

• RS-422/RS-485 Communications
• Industrial Networks
• Telecommunications Systems
• HVAC Controls

(V CC = +4.75V to +5.25V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V CC = +5V and T A = +25°C.)

│

Voltages Referenced to GND

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.