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MAX3076EESD-T 其他数据使用手册 - Maxim Integrated（美信）
制造商:
Maxim Integrated（美信）
封装:
SOP
描述:
RS-422/RS-485 接口 IC
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MAX3076EESD-T数据手册
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General Description
The MAX3070E–MAX3079E 3.3V, ±15kV ESD-protected,
RS-485/RS-422 transceivers feature one driver and one
receiver. These devices include fail-safe circuitry, guaranteeing
a logic-high receiver output when receiver inputs are open
or shorted. The receiver outputs a logic-high if all transmitters
on a terminated bus are disabled (high impedance). The
devices include a hot-swap capability to eliminate false
transitions on the bus during power-up or hot insertion.
The MAX3070E/MAX3071E/MAX3072E feature reduced
slew-rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing error-
free data transmission up to 250kbps. The MAX3073E/
MAX3074E/MAX3075E also feature slew-rate-limited
drivers but allow transmit speeds up to 500kbps. The
MAX3076E/MAX3077E/MAX3078E driver slew rates are
not limited, making transmit speeds up to 16Mbps possible.
The MAX3079E slew rate is pin-selectable for 250kbps,
500kbps, and 16Mbps.
The MAX3072E/MAX3075E/MAX3078E are intended
for half-duplex communications, and the MAX3070E/
MAX3071E/MAX3073E/MAX3074E/MAX3076E/
MAX3077E are intended for full-duplex communications.
The MAX3079E is selectable for half-duplex or full-duplex
operation. It also features independently programmable
receiver and transmitter output phase through separate
pins.
The MAX3070E–MAX3079E transceivers draw 800μA
of supply current when unloaded, or when fully loaded
with the drivers disabled. All devices have a 1/8-unit load
receiver input impedance, allowing up to 256 transceivers
on the bus.
Applications
● Lighting Systems
● Industrial Control
● Telecom
● Security Systems
● Instrumentation
Benets and Features
● Protection for Robust Performance
• ±15kV Human Body Model ESD on I/O Pins
• True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
• Enhanced Slew-Rate-Limiting Facilitates Error-
Free Data Transmission (MAX3070E-MAX3075E/
MAX3079E)
• Hot-Swap Input Structure on DE and RE
● Flexible Feature Set for Ease of Design
• Pin-Selectable Full/Half-Duplex Operation
(MAX3079E)
• Phase Controls to Correct for Twisted-Pair
Reversal (MAX3079E)
• Allows up to 256 Transceivers on the Bus
• Available in Industry-Standard SO and DIP packages
● 10µA Shutdown Current Mode for Power Savings
(Except MAX3071E/MAX3074E/MAX3077E)
19-2668; Rev 4; 1/16
Ordering Information at end of data sheet.
Selector Guide, Pin Configurations, and Typical Operating
Circuits appear at end of data sheet.
MAX3070E–MAX3079E +3.3V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
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