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SP481E

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This datasheet covers the SP481E and SP485E, a family of enhanced low-power half-duplex RS-485/RS-422 transceivers. The document defines their electrical and AC characteristics for 5V operation. Key parameters include a maximum data rate of 10 Mbps, differential output voltages of 1.5 to 2 VCC, and exceptional ESD tolerance up to ±15kV for the Human Body Model. The SP481E specifically features a low-power shutdown mode, while both parts offer BiCMOS design for efficient performance.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
output voltage — — 200 mV R = 27Ω or R = 50Ω; Figure 1
output current 7 mA — 95 mA 0V \leq V_O \leq V_{CC}
supply voltage range 4.75 V — 5.25 V
operating temperature 0 °C — 70 °C
propagation delay — 30 ns —
data rate 10 Mbps — — \overline{RE} = 5V, DE = 5V; R_{DIFF} = 54\Omega, C_{L1} = C_{L2} = 100pF
fall time — 15 ns 40 ns From 10%-90%; R_{DIFF} = 54\Omega, C_{L1} = C_{L2} = 100pF; See Figures 3 and 6
channel count — 1 —
driver count — 1 —
receiver count — 1 —
03 — Alternatives

Closest matches to SP481E

MAX485ESA 10.0× lower output voltage, 4.0× lower data rate, 2.8× higher output current
SP3222ECA-L 2.7× higher output voltage, 1.5× lower output current, 1.2× lower supply voltage range
MAX3232 10.0× higher propagation delay, 1.6× lower operating temperature, 1.5× lower output current
SN65HVD3082E 1.6× lower operating temperature, similar supply voltage range
PCA9509 3.6× higher propagation delay, 2.5× lower output current, 1.6× lower operating temperature
CH340C 5.0× lower data rate, 1.6× lower operating temperature, 1.5× lower supply voltage range
04 — FAQ

Frequently asked questions

What is the channel count of the SP481E?

The channel count is 1.

What is the data rate when \overline{RE} = 5V, DE = 5V; R_{DIFF} = 54\Omega, C_{L1} = C_{L2} = 100pF?

The data rate is 10 Mbps.

What is the driver count for the SP481E?

The driver count is 1.

What is the fall time of the SP481E?

The fall time is 15 ns, measured from 10%-90% with R_{DIFF} = 54\Omega and C_{L1} = C_{L2} = 100pF, as shown in Figures 3 and 6.

What is the maximum operating temperature for the SP481E?

The maximum operating temperature is 70 °C.

What is the output current when 0V ≤ V_O ≤ V_{CC}?

The output current is 95 mA.

What is the output voltage when R = 27Ω or R = 50Ω as shown in Figure 1?

The output voltage is 200 mV.

What is the propagation delay of the SP481E?

The propagation delay is 30 ns.

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