Saleae Logic

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Saleae Logic
Saleae Logic.png
Status supported
Source code fx2lafw
Channels 8
Samplerate 24MHz
Samplerate (state)
Triggers none (SW-only)
Min/max voltage -0.5V — 5.25V
Threshold voltage Fixed: VIH=2.0V—5.25V, VIL=-0.5V—0.8V
Memory none
Compression none

The Saleae Logic is a USB-based, 8-channel logic analyzer with up to 24MHz sampling rate.

The unit itself is very small, and has a USB 2.0 port connecting it to a PC (and powering the unit) and a connector for the 8 + 1 probe set. It is built around a Cypress EZ-USB FX2LP microcontroller — an 8051-compatible chip with built-in USB 2.0 controller. It can sample 8 channels up to 24MHz.

In sigrok, we use the open-source fx2lafw firmware for this logic analyzer.

See Saleae Logic/Info for more details (such as lsusb -vvv output) about the device.

See Saleae Logic16 for the successor product of the Saleae Logic.


  • Main chip: Cypress CY7C68013A-56PVXC (FX2LP)
  • ESD protection: ST DVIULC6-4SC6
  • 3.3V voltage regulator: ST LD33C
  • I2C EEPROM: Microchip 24LC00
  • Crystal: 24MHz

The case has four Torx T2 screws you need to remove in order to be able to open it.



Since we use the open-source fx2lafw firmware for this device, we don't need to know the protocol.

However, for those interested in this, see our old vendor protocol docs.