OpenLogic Micro
##Summary
An open-source and open-hardware Logic analyzer based on the Cypress CY7C68013A chip. At just over one square inch, this is one of the tiniest logic analyzers available. At under about $20 / unit for parts (in small quantities), it's also inexpensive, and it's fully compatible with popular logic analyzer software designed for the CY7C68013A chip.
Build diagram
OpenLogic Micro features components loaded on the top side only. SSOP, SOT23, SOT223, 0805, 0603 and 0402 parts are used, along with a surface-mount USB connector and crystal.
Board renders
Bill of Materials
OpenLogic Micro has a pretty simple BOM featuring all surface-mount parts. The total cost for the BOM is under $18 in small quantities. If you acquire the Cypress FX2LP chip, the right crystal and micro-USB connector, the rest can virtually be built from junk-box SMD compoennts.
C1 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C2 1uF 10V 0603 CAP-0603-MIN 0603-MIN
C3 10pF 50V 0402 CAP-0402-MIN 0402-MIN
C4 10pF 50V 0402 CAP-0402-MIN 0402-MIN
C5 1uF 10V 0603 CAP-0603-MIN 0603-MIN
C7 10uF 6.3V 0805 CAP-0805-WIDE 0805-WIDE
C8 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C9 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C10 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C11 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C12 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C13 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C14 100nF 10V 0402 CAP-0402-MIN 0402-MIN
C15 100nF 10V 0402 CAP-0402-MIN 0402-MIN
F1 400mA PTC 0805 PTC-0805-EXTRAWIDE 0805-EXTRAWIDE
IC1 CYPRESS-FX2LP-USB-HS-8051-CONTROLLER CYPRESS-FX2LP-USB-HS-8051-CONTROLLER TSSOP56
IC2 Microchip 24C00 EEPROM-I2C-MCP-24AAXX/24LCXX SOT23-5
IC3 LM1117-3.3V SOT223 LDO-REGULATOR-FIXED-NCP1117 SOT223-3
IC4 ESD clamp chip (TBD) TBD SOT23-6
IC5 ESD clamp chip (TBD) TBD SOT23-6
K1 FCI 10118193 MicroUSB USB-5-PIN-MICROB-FCI-10118193-NARROW USB-MICROB-FCI-10118193-NARROW
L1 3A 100R@100MHz Ferrite 0603 FERRITE-BEAD-0603-MIN 0603-MIN
L2 3A 100R@100MHz Ferrite 0603 FERRITE-BEAD-0603-MIN 0603-MIN
R1 2.2kΩ 0402 RESISTOR-0402-MIN 0402-MIN
R2 2.2kΩ 0402 RESISTOR-0402-MIN 0402-MIN
R3 10kΩ 0402 RESISTOR-0402-MIN 0402-MIN
R4 10kΩ 0402 RESISTOR-0402-MIN 0402-MIN
R5 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R6 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R7 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R8 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R9 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R10 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R11 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
R12 47Ω 1% 0402 RESISTOR-0402-MIN 0402-MIN
X1 NDK NX3225GA 24MHz CRYSTAL-4-PIN-NDK-NX3225GA CRYSTAL-NDK-NX3225GA-3X2.5MM
EEPROM programming
The 24LC00 EEPROM on the board must be programmed per the CY7C68013A datasheet with an appropriate USB identifier. Use your own USB vendorID/productID pair or use a pair that's supported by the logic analyzer software you wish to use (at your own risk, of course!) The !reset, vdd, gnd, scl and sda test points on the bottom of the board facilitate programming of the EEPROM - simply power the board through vdd and gnd, hold !reset low and write configuration/USB ID bytes to the EEPROM with sda and scl.
License
Licensed under Creative Commons CC-BY-SA-3.0 unless otherwise specified.
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