EZ Protoboard Parts List
| Required Components | |||||
| Part | Package | Power | Qty | Unit Cost | Total Cost |
| Single Layer PCB | 160mm x 100mm | 1 oz. copper | 0.5 | $21.00 | $10.50 |
| Custom single sided PCB. Area used by one protoboard is 75mm x 100mm. Either etch your own or hire Olimex to build it for you. Suppliers: Olimex | |||||
| CY7C646x3-80NC | PQFP-80 | 3.0V - 3.6V, 50mA Typ. | 1 | $16.40 | $16.40 |
| Cypress EZ-USB FX Microcontroller. There are two versions of
this chip, you can use either one with this design. CY7C64613-80NC has 8K
of onboard static RAM and isochronous USB support ("real time" non-guaranteed data transport) while CY7C64603-80NC costs slightly less with only 4K onboard
static RAM and no isochronous support. EAGLE Library: [usb.lbr] Suppliers: Unique Technologies, Arrow, Avnet Marshall, Future Active | |||||
| LD1117DT33 | TO-252 | 3.3V, 800mA output | 1 | $0.92 | $0.92 |
| Fixed-output 3.3V low dropout linear voltage regulator for
powering up the circuit. Accepts a maximum of 15VDC input and can output
up to 800mA of current at 3.3V. EAGLE Library: [powersupply.lbr] Suppliers: Mouser, Nu Horizons, Arrow | |||||
| USB B Receptacle (AMP 787780-1) | Through Hole | - | 1 | $0.79 | $0.79 |
| Right angle USB 'B' series receptable. EAGLE Library: [usb.lbr] Suppliers: Mouser, Digi-Key, Avnet Marshall, Arrow, Newark Electronics | |||||
| 2.1mm DC Power Jack | Through Hole | - | 1 | $0.63 | $0.63 |
| Right angle 2.1mm through hole power jack. EAGLE Library: [powersupply.lbr] Suppliers: Mouser | |||||
| Tactile Push Switches | Through Hole | - | 2 | $0.19 | $0.38 |
| Reset and Wakeup push buttons. Suppliers: RadioShack 900-8098, Mouser | |||||
| 1x36 Sockets | Through Hole | - | 3 | $2.02 | $6.06 |
| PCB mount sockets for bread board prototyping and board
stacking purposes. Buy yourself a couple extra because you may hose a few
when you go to cut them down to 28 pin size. EAGLE Library: [headers.lbr] Suppliers: Mouser | |||||
| HC49S FOXS/120 | 12MHz Crystal | series-resonant, fundamental mode | 1 | $0.57 | $0.57 |
| 12MHz series-resonant fundamental mode crystal to provide clock signal for the Cypress EZ-USB FX microcontroller. Suppliers: Mouser | |||||
| 2.2µF capacitor | Radial 1.5mm LS | 50V max, 20% Tol. | 1 | $0.14 | $0.14 |
| 2.2µF power decoupling capacitor for AVCC on the EZ-USB chip. Suppliers: RadioShack Part 900-7676, 900-7700, or 900-7707 | |||||
| 10µF minimum capacitor | Radial 2.0mm LS | 10V max, 20% Tol. | 1 | $0.15 | $0.15 |
| Output power capacitor. May be substituted with larger value
capacitors that fit in the same leg spacing. Suppliers: RadioShack 900-7660, RadioShack 900-7659, RadioShack 900-7669, RadioShack 900-7661 | |||||
| 27pF capacitors | 0805 SMD | 50V max, 5% Tol. NPO | 2 | $0.084 | $0.17 |
| 27pF capacitors for crystal oscillator circuit. Cypress
datasheets state you may use anywhere from 22pF to 33pF. Suppliers: Mouser | |||||
| 1M resistor | 0805 SMD | 5%, 1/10W | 1 | $0.08 | $0.08 |
| 1M Ohm resistor for crystal oscillator circuit. Suppliers: Mouser | |||||
| 1.0µF capacitors | 0805 SMD | 16V max, 20% Tol. | 1 | $0.20 | $0.20 |
| 1.0µF capacitor for power on reset circuitry. There is
space for a second capacitor on the WAKEUP# line, but we found on our board
that this second capacitor was not necessary. Suppliers: Mouser | |||||
| 22 Ohm resistors | Through Hole | 1% Tol. 1/2W | 2 | $0.14 | $0.28 |
| 22 Ohm resistors for USB D+/D- lines. EZ-USB datasheet says
to use 24 Ohm resistors while all of their reference schematics use 22 Ohm
resistors, so probably anything in that range will work. Suppliers: RadioShack 900-0495, RadioShack 900-0496, Mouser | |||||
| 1.5K resistor | Through Hole | 1%, 1/2W | 1 | $0.14 | $0.14 |
| 1.5K Ohm resistor for DISCON# drive. Suppliers: RadioShack 900-0539, Mouser | |||||
| 10K resistors | 0805 SMD | 1% Tol. 1/10W | 4 (one omittable) | $0.09 | $0.36 |
| 10K pull up/down resistors. One resistor for IDE pull up may
be omitted. Suppliers: Mouser | |||||
| 1K resistors | 0805 SMD | 1% Tol. 1/10W | 4 (two omittable) | $0.09 | $0.36 |
| Two 1K Ohm resistors for I2C pull ups (required). One resistor for bus/self power automatic switchover circuit (may be omitted). One resistor for IDE interface pull up (may be omitted) Suppliers: Mouser | |||||
| 0.1µF capacitors | 0805 SMD | 50V max, 10% Tol. X7R | 9 (two omittable) | $0.14 | $1.26 |
| 0.1µF capacitors for IC power decoupling. May omit
two if leaving off the auxilary I/O ICs. Suppliers: Mouser or Mouser 20% | |||||
| Optional Components - USB/Externally Powered Switch Over Circuit | |||||
| Part | Package | Power | Qty | Unit Cost | Total Cost |
| Si9430DY | SO-8 | 5.8A, R(on) = 0.09@-4.5Vgs | 1 (omittable) | $1.69 | $1.69 |
| P-Channel MOSFET for bus powered/self powered automatic switch-over circuit. This part can be omitted if you are going to run the board
only off of an external power supply. The USB port is only specified to supply
500mA of current, so if your external circuitry is going to exceed this limit,
you will need to stay off of bus power anyway. EAGLE Library: [powersupply.lbr] Suppliers: RadioShack 900-5331, Arrow, Avnet Marshall | |||||
| Optional Components - Protection Circuitry | |||||
| Part | Package | Power | Qty | Unit Cost | Total Cost |
| SR102/SB120 Diodes | DO-41 | 20V Max, 1A, 0.57V drop | 2 (omittable) | $0.49 | $0.98 |
| Diodes for protecting against reverse polarity power. You
may omit one diode if you aren't going to use the USB power switch over
circuit. You may substitute a plain wire for the second diode if you are
omitting the USB power switch over circuit and you aren't going to plug the
power in backwards on the DC jack (which is hard to do after you get it
wired up correctly the first time). Warning: If you are going to use the USB powered feature, both diodes must be installed to properly protect your computer's USB port. Suppliers: RadioShack 900-3180 | |||||
| USB6B1RL | SO-8 | - | 1 (omittable) | $1.00 | $1.00 |
| USB port transient suppressor - keep your Cypress chip from dying when the USB port is hit with static electricity. If you can't get ahold of one, this part can be omitted by simply soldering in jumper wires across the pads left to right (e.g. pin 1 to pin 8, pin 2 to pin 7, etc). Of course, then your Cypress chip is left unprotected, but you're a careful person anyway, right? EAGLE Library: [usb.lbr] Suppliers: Nu Horizons, Arrow, Avnet Marshall | |||||
| Optional Components - Power On Firmware (non-volatile) | |||||
| Part | Package | Power | Qty | Unit Cost | Total Cost |
| DIP-8 Socket | Through Hole | - | 1 (omittable) | $0.08 | $0.08 |
| PCB mount socket for serial EEPROM chip. May be omitted
if you aren't going to use an EEPROM for storing firmware. Suppliers: Mouser, RadioShack 900-5738 | |||||
| M24C64-WBN6 | DIP-8 | 2.5-5.5V, 2mA | 1 (omittable) | $2.54 | $2.54 |
| 8K I2C Serial EEPROM for non-volatile firmware storage.
This part can be omitted if you don't mind having to download firmware from
a computer everytime your device is powered on. EAGLE Library: [usb.lbr] Suppliers: Mouser, Arrow, Nu Horizons | |||||
| Optional Components - Auxilary Input/Status LEDs | |||||
| Part | Package | Power | Qty | Unit Cost | Total Cost |
| 74HC245 | SO-20 (wide body) | 2-6V | 1 (omittable) | $0.80 | $0.80 |
| 8 bit buffer for optional auxilary 8 bit input port. This
part can be omitted if you don't have any use for the extra input pins. Suppliers: Mouser, RadioShack 900-3479 | |||||
| 3.0mm T1 LEDs | Through Hole | - | 9 (omittable) | $0.20 | $1.80 |
| Status LEDs. May be omitted if you don't need a set of
status LEDs. Suppliers: RadioShack 900-6086, Mouser | |||||
| 74HC373 | SO-20 (wide body) | 2-6V, 35mA max per I/O pin | 1 (omittable) | $0.62 | $0.62 |
| 8 bit latch for optional auxilary status LED port. This part can be omitted if you don't have any use for the status LEDs. Suppliers: Mouser, RadioShack 900-3504 | |||||
| 330 Ohm resistors | 0805 SMD | 5% Tol. 1/10W | 9 (omittable) | $0.08 | $0.72 |
| 330 Ohm current limiting resistors for optional status LEDs. Suppliers: Mouser | |||||
| Optional Components - IDE Interface Port | |||||
| Part | Package | Power | Qty | Unit Cost | Total Cost |
| 2x40 Male Header | Through Hole | - | 0.5 (omittable) | $1.65 | $0.83 |
| PCB mount header for 40 pin IDE interface. May be omitted
if you are not going to use the IDE interface. EAGLE Library: [headers.lbr] Suppliers: Mouser 517-6121TG or Mouser 517-6121TN | |||||
| 33 Ohm resistors | 0805 SMD | - | 5 (omittable) | $0.09 | $0.45 |
| 33 Ohm resistors for IDE interface. May be omitted
if you are not going to use the IDE interface. Suppliers: Mouser 292-33.2 | |||||
| 33 Ohm resistor | Through Hole | 1/8W | 1 (omittable) | $0.07 | $0.07 |
| 33 Ohm resistor for IDE interface (reset). May be omitted
if you are not going to use the IDE interface. Suppliers: RadioShack 900-0029 | |||||
| 22 Ohm resistors | 0805 SMD | - | 3 (omittable) | $0.09 | $0.27 |
| 22 Ohm resistors for IDE interface. May be omitted
if you are not going to use the IDE interface. Suppliers: Mouser 292-22.1 | |||||
| 82 Ohm resistors | 0805 SMD | - | 3 (omittable) | $0.09 | $0.27 |
| 82 Ohm resistors for IDE interface. May be omitted
if you are not going to use the IDE interface. Suppliers: Mouser 292-82.5 | |||||
| 5.6K Ohm resistor | 0805 SMD | - | 1 (omittable) | $0.09 | $0.09 |
| 5.6K Ohm resistors for IDE interface. May be omitted
if you are not going to use the IDE interface. Suppliers: Mouser 292-5.62K | |||||