SP3485
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.
What the SP3485 family does
The SP3485 is a +3.3V low power half-duplex transceiver supporting RS-485 and RS-422 protocols. It operates from a single +3.3V supply while remaining interoperable with +5.0V logic. The device handles a maximum data rate of 10 Mbps with a common-mode input voltage range of -7V to +12V. It supports up to 32 transceivers on the serial bus and features driver output short-circuit protection. The SP3485 typically serves in industrial serial communication applications requiring robust differential signaling and low power consumption.
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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.
SP3485 datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| output current | 7 mA | — | 60 mA | 0V ≤ VCM≤ VCC; DC Characteristics | Exar datasheet, p. 3 — CAUTION: |
| supply voltage range | 3.13 V | — | 3.46 V | VCC = +3.3V ±5% | Exar datasheet, p. 2 — ELECTRICAL CHARACTERISTICS |
| operating temperature | 0 °C | — | 70 °C | Exar datasheet, p. 9 | |
| propagation delay | 20 ns | 40 ns | 60 ns | Figures 2 & 9 | Exar datasheet, p. 2 — ELECTRICAL CHARACTERISTICS |
| data rate | 10 Mbps | — | — | \overline{RE} = VCC, DE = VCC | Exar datasheet, p. 2 — ELECTRICAL CHARACTERISTICS |
| fall time | — | 5 ns | 20 ns | From 10%-90%; Figures 3 and 10 | Exar datasheet, p. 2 — ELECTRICAL CHARACTERISTICS |
| channel count | — | 1 | — | Exar datasheet, p. 1 | |
| driver count | — | 1 | — | Exar datasheet, p. 1 | |
| receiver count | — | 1 | — | Exar datasheet, p. 1 |
Closest matches to SP3485
SP3490
1.8× higher output current, 1.6× lower operating temperature, similar fall time
GM3085E
10.0× lower data rate, 1.8× higher propagation delay, 1.6× lower operating temperature
SP481E
3.0× higher fall time, 2.3× lower propagation delay, 1.5× higher output current
GM3485E
3.5× lower propagation delay, 1.6× lower operating temperature, 1.5× higher output current
PCA9509
1.7× lower output current, 1.6× higher propagation delay, 1.6× lower operating temperature
SP3485E
8.8× lower propagation delay, 1.2× higher data rate, similar output current
YD3082E
1.8× higher propagation delay, 1.6× lower operating temperature, 1.5× higher output current
ADM2483BRW
20.0× lower data rate, 6.2× higher propagation delay, 1.6× lower operating temperature
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