DATASHEET
ISL3170E, ISL3171E, ISL3172E, ISL3173E, ISL3174E, ISL3175E, ISL3176E, ISL3177E, ISL3178E FN6307
Rev.6.00
Aug 31, 2017 В±15kV ESD Protected, 3.3V, Full Fail-Safe, Low Power, High Speed or Slew Rate Limited,
RS-485/RS-422 Transceivers
The Intersil ISL317xE are В±15kV IEC61000 ESD protected,
3.3V powered single transceivers that meet both the RS-485
and RS-422 standards for balanced communication. These
devices have very low bus currents (+125mA/-100mA), so
they present a true “1/8 unit load” to the RS-485 bus. This
allows up to 256 transceivers on the network without
violating the RS-485 specification’s 32 unit load maximum,
and without using repeaters. For example, in a remote utility
meter reading system, individual meter readings are routed to
a concentrator using an RS-485 network, so the high allowed
node count minimizes the number of repeaters required.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven. Features IEC61000 ESD protection on RS-485 I/O pins В±15kV
-Class 3 ESD level on all other pins . >7kV HBM Full fail-safe (open, short, terminated/floating) receivers Hot plug -Tx and Rx outputs remain three-state during
power-up (only versions with output enable pins) True 1/8 unit load allows up to 256 devices on the bus Single 3.3V supply High data rates . up to 20Mbps Low quiescent supply current .800ВµA (Max)
-Ultra low shutdown supply current .10nA Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes. -7V to +12V common-mode input/output voltage range The ISL3170E through ISL3175E utilize slew rate limited …
