Home › Parts › Instruments › Logic analyzer (8 channels)

Logic analyzer (8 channels)

Instruments · 8 CH · UART I²C SPI

USB logic analyzer, 8 channels + GND, 1.4 V threshold, decodes UART, I²C and SPI

Logic analyzer (8 channels) on the simulator's bench

Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.

Typical part: 8-channel USB logic analyzer (24 MHz, “Saleae-compatible” class) with protocol decoders

Pins

Ratings and limits

Inputs	8 digital channels, threshold about 1.4 V, 5 V tolerant, high impedance (about 1 MΩ): clipping on does not load the circuit
Sample rate	24 MS/s on the real tool: fast enough for UART to 2 Mbaud, I²C at 400 kHz, SPI to a few MHz
Decoders	UART (set the baud), I²C (SDA + SCL), SPI (SCK, MOSI, MISO, CS): bytes, addresses, ACK/NACK, timing
Ground	its GND must go to the circuit’s ground, or every channel reads noise

How to use it

The fastest answer to “why does nothing answer?”: clip channels onto TX/RX, SDA/SCL or the SPI lines and read what actually crossed the wire. A NACK, a swapped pin, the wrong baud or a missing CS shows up at a glance.

More in instruments

Sources: Sigrok/PulseView protocol decoders (UART, I²C, SPI); fx2lafw 24 MHz 8-channel analyzers.