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SP3490

Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the SP3490 family does

The SP3490 and SP3491 are +3.3V low power full-duplex transceivers supporting RS-485 and RS-422 protocols up to 10 Mbps. These devices operate from a single 3.3V supply with a common-mode input voltage range of -7V to +12V. The SP3491 variant adds driver and receiver tri-state enable lines. They support up to 32 transceivers on the serial bus and maintain compatibility with industry standards like the SN75179 and SN75180. The SP3490 and SP3491 utilize Exar's BiCMOS process to deliver low power consumption without sacrificing performance in commercial, industrial, and military temperature grades.

Next step
Start building with SP3490 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.
Ordering code:
01 — Key specifications

SP3490 datasheet parameters

ParameterMinTypMaxConditionsSource
output current — — 60 mA 0V ≤ VO≤ VCC Exar datasheet, p. 3 — CAUTION:
supply voltage range 3 V — 3.6 V Exar datasheet, p. 6
operating temperature -40 °C — 85 °C Exar datasheet, p. 12
propagation delay 20 ns 40 ns 60 ns Figures 2 & 9 Exar datasheet, p. 4 — ELECTRICAL CHARACTERISTICS
data rate — 10 bps — Exar datasheet, p. 5
fall time — 5 ns 20 ns From 10%-90%; Figures 3 and 10 Exar datasheet, p. 4 — ELECTRICAL CHARACTERISTICS
channel count — 1 — Exar datasheet, p. 1
driver count — 1 — Exar datasheet, p. 1
receiver count — 1 — Exar datasheet, p. 1
01 — Key specifications

SP3491 datasheet parameters

ParameterMinTypMaxConditionsSource
output current — — 60 mA 0V ≤ VO≤ VCC Exar datasheet, p. 3 — CAUTION:
supply voltage range 3 V — 3.6 V Exar datasheet, p. 6
operating temperature -40 °C — 85 °C Exar datasheet, p. 12
propagation delay 20 ns 40 ns 60 ns Figures 2 & 9 Exar datasheet, p. 4 — ELECTRICAL CHARACTERISTICS
data rate — 10 bps — Exar datasheet, p. 5
fall time — 5 ns 20 ns From 10%-90%; Figures 3 and 10 Exar datasheet, p. 4 — ELECTRICAL CHARACTERISTICS
channel count — 1 — Exar datasheet, p. 1
driver count — 1 — Exar datasheet, p. 1
receiver count — 1 — Exar datasheet, p. 1
03 — Alternatives

Closest matches to SP3490

SP3485 1.8× lower output current, 1.6× higher operating temperature, similar fall time
GM3085E 1.8× higher propagation delay, 1.3× higher supply voltage range, 1.2× lower output current
YD3082E 10.0× lower data rate, 1.8× higher propagation delay, 1.3× higher supply voltage range
SP481E 3.0× higher fall time, 2.3× lower propagation delay, 1.6× higher operating temperature
ADM2483BRW 6.2× higher propagation delay, 1.3× lower output current, 1.2× higher supply voltage range
GM3232E 7.0× lower propagation delay, similar operating temperature, similar output current
GM3485E 3.5× lower propagation delay, 1.3× higher supply voltage range, 1.2× lower output current
MAX3232 4.3× higher propagation delay, 1.7× lower output current, 1.6× higher operating temperature
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