Build with PCA9517 — Datasheet Specs & AI Design Help

00 — Overview

What the PCA9517 does

The PCA9517 is a two-channel, bidirectional I2C-bus repeater that translates voltage levels between 0.9V and 5.5V. Available in SO8 and TSSOP8 packages, it supports A-side supplies from 0.9V to 5.5V and B-side supplies from 2.7V to 5.5V. This device handles clock frequencies up to 400kHz and isolates capacitance to allow 400pF on each side. It features active-high enable control, open-drain inputs and outputs, and lock-up free operation. The PCA9517 accommodates Standard and Fast mode I2C-bus devices, multiple masters, and arbitration across the repeater. It serves as a footprint and functional replacement for the PCA9515/15A, enabling system designers to isolate bus halves for both voltage and capacitance while maintaining full I2C-bus and SMBus compatibility.

Next step

Start building with PCA9517 → 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.

01 — Key specifications

Datasheet parameters

Datasheet parameters for PCA9517
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	—	1.5 mA	5 mA	VCC = 5.5 V; SDAn = SCLn = VCC; iccac	NXP datasheet, p. 9 — Table 4. Static characteristics
operating temperature (abs max)	-40 °C	—	85 °C	operating in free air; tamb; Operating Conditions	NXP datasheet, p. 8 — Table 3. Limiting values
input capacitance	—	6 pF	7 pF	VI = 3.0 V or 0 V; ci; Enable	NXP datasheet, p. 10 — Table 4. Static characteristics ...continued
propagation delay	30 ns	80 ns	110 ns	[5]; t{phl}; VCC = 2.7\text{ V to } 5.5\text{ V}; GND = 0\text{ V}; Tamb = -40\text{ }^{\circ}\text{C to } +85\text{ }^{\circ}\text{C}, \text{ unless otherwise specified. [1][2]}	NXP datasheet, p. 10 — Table 5. Dynamic characteristics
data rate	—	400 kbps	—		NXP datasheet, p. 2
output voltage low	470 mV	520 mV	600 mV	IOL = 100 µA or 6 mA; vol	NXP datasheet, p. 9 — Table 4. Static characteristics
channel count	—	2	—		NXP datasheet, p. 1

02 — Alternatives

Closest matches to PCA9517

PCA9509 3.3× lower quiescent current, 3.0× lower input capacitance, 2.6× lower output voltage low

PCA9557BS 2.0× higher power dissipation, 1.6× lower input capacitance, 1.6× lower output capacitance

MAX3232 5.0× lower quiescent current, 1.8× higher propagation delay, 1.6× lower data rate

SN65HVD3082E 4.1× higher propagation delay, 3.5× lower quiescent current, 3.5× lower output voltage low

ADM2483BRW 5.2× lower output voltage low, 2.6× higher propagation delay, 1.5× lower input capacitance

GM3085E 10.7× lower quiescent current, 2.5× higher data rate, 1.3× lower propagation delay

MCP4017 1.9× higher operating temperature, 1.3× lower output voltage low, similar data rate

SP3222ECA-L 5.0× lower quiescent current, 1.8× higher propagation delay, 1.7× lower data rate

03 — FAQ

Frequently asked questions

What is the channel count of the PCA9517D?

The channel count is 2.

What is the maximum data rate of the PCA9517D?

The maximum data rate is 400 kbps.

What is the input capacitance when VI is 3.0 V or 0 V and the device is enabled?

The input capacitance is 6 pF.

What is the maximum operating temperature for the PCA9517D when operating in free air?

The operating temperature is 85 °C when operating in free air (tamb).

What is the output voltage low specification for the PCA9517D?

The output voltage low is 520 mV at IOL = 100 µA or 6 mA.

What is the propagation delay (tphl) for the PCA9517D?

The propagation delay (tphl) is 80 ns at VCC = 2.7 V to 5.5 V, GND = 0 V, and Tamb = -40 °C to +85 °C, unless otherwise specified.

What is the quiescent current when VCC = 5.5 V, SDAn = SCLn = VCC, and iccac?

The quiescent current is 1.5 mA.