ADM4857

Features: EIA RS-485-/RS-422-compliant Data rate options ADM4850/ADM4854-115 kbps ADM4851/ADM4855-500 kbps ADM4852/ADM4856-2.5 Mbps ADM4853/ADM4857-10 Mbps Half- and full-duplex options Reduced slew rates for low EMI True fail-safe receiver inputs 5 µA (maximum) supply current in shutdown mo...

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SeekIC No. : 004275867 Detail

ADM4857: Features: EIA RS-485-/RS-422-compliant Data rate options ADM4850/ADM4854-115 kbps ADM4851/ADM4855-500 kbps ADM4852/ADM4856-2.5 Mbps ADM4853/ADM4857-10 Mbps Half- and full-duplex options Reduced slew...

floor Price/Ceiling Price

Part Number:
ADM4857
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/3/28

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Product Details

Description



Features:

EIA RS-485-/RS-422-compliant Data rate options
ADM4850/ADM4854-115 kbps
ADM4851/ADM4855-500 kbps
ADM4852/ADM4856-2.5 Mbps
ADM4853/ADM4857-10 Mbps
Half- and full-duplex options
Reduced slew rates for low EMI
True fail-safe receiver inputs 5 µA (maximum) supply current in shutdown mode Up to 256 transceivers on one bus
Outputs high-z when disabled or powered off −7 V to +12 V bus common-mode range
Thermal shutdown and short-circuit protection
Pin-compatible with MAX308x
Specified over the −40°C to +85°C temperature range
Available in 8-lead SOIC and LFCSP packages





Application

Low power RS-485 applications
EMI-sensitive systems
DTE-DCE interfaces
Industrial control
Packet switching
Local area networks
Level translators





Pinout

ADM4857 Diagram




Specifications

Isolation V (rms) ---
Available Packages SOIC
ESD-Protection ---
Pwr Supply (Vnom) +5
Data Rate 10Mbps
Full-Half Duplex Full
# of Nodes On Bus 256
Drvr/Rcvr Enable No
Fail Safe Open, Short


VCC to GND 6 V
Digital I/O Voltage (DE, RE, DI, ROUT) −0.3 V to VCC + 0.3 V
Driver Output/Receiver Input Voltage −9 V to +14 V
Operating Temperature Range −40°C to +85°C
Storage Temperature Range −65°C to +125°C
JA Thermal Impedance
SOIC 110°C/W
LFCSP 62°C/W
Lead Temperature
Soldering (10 s) 300°C
Vapour Phase (60 s) 215°C
Infrared (15 s)220°C





Description

The ADM4850−ADM4857 are differential line transceivers suitable for high speed half- and full-duplex datacomm unication on multipoint bus transmission lines. They are designed for balanced data transmission and comply with EIA Standards RS-485 and RS-422. The ADM4850−ADM4857 are half-duplex transceivers, which share differential lines and have separate enable inputs for the driver and receiver. The full-duplex ADM4850−ADM4857 transceivers have dedicated differential line driver outputs and receiver inputs.

The ADM4850−ADM4857 parts have a 1/8-unit-load receiver input impedance, which allows up to 256 transceivers on one bus. Since only one driver should be enabled at any time, the output of a disabled or powered-down driver is three-stated to avoid overloading the bus.

The ADM4850−ADM4857 receiver inputs have a true fail-safe feature, which ensures a logic high output level when the inputs are open or shorted. This guarantees that the receiver outputs are in a known state before communication begins and when co-mmunication ends. The driver outputs are slew-rate limited to reduce EMI and data errors caused by reflections from improperly terminated buses. Excessive power dissipation caused by bus contention or by output shorting is prevented with a thermal shutdown circuit.

The ADM4850−ADM4857 parts are fully specified over the commercial and industrial temperature ranges, and are available in 8-lead SOIC and LFCSP packages.






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