FreeCalypso > hg > fc-small-hw
view mmtb1/schem+bom/MCL @ 28:bd7eec55ebc0
duart28: new design ideas
* added input buffers (LVC with Ioff feature) to prevent high current flow
from powered-up target into powered-down FT2232D inputs;
* added series resistors on outputs to limit current flow from powered-up
adapter into powered-down Calypso target;
* buffer IC changed from 74LVC125A to 74LVC541A.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 28 Jun 2020 22:06:24 +0000 |
parents | 0f9bdd60ce50 |
children |
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# Big power capacitor C1: hier=big_cap manufacturer=Vishay Sprague manufacturer_part_number=595D108X96R3R2T # Leonardo used 20% version, but the 10% version is now cheaper at Mouser! description=Tantalum capacitor, 1000 uF, 6.3 V, 70 mOhm ESR footprint=file:TAN-R-59XD npins=2 source=Jotrin # VSIM bypass cap next to the SIM socket C2: hier=sim.C306 value=1uF footprint=0603 description=Ceramic chip capacitor, X5R, 1 uF, 0603 manufacturer=Samsung Electro-Mechanics manufacturer_part_number=CL10A105KB8NNNC vendor=Digi-Key vendor_part_number=1276-1860-1-ND npins=2 D1: hier=led.led device=SML-510MW manufacturer=Rohm manufacturer_part_number=SML-510MWT86 description=SMT LED, green, 0603 vendor=Digi-Key vendor_part_number=511-1308-1-ND footprint=file:SML-510MW pinout=ipc-diode.pinout npins=2 # Power input connector J1: hier=pwr_input_conn manufacturer=Weidmuller manufacturer_part_number=1510460000 description=Power input connector, 3 pins, 5.08 mm spacing source=Newark source=Digi-Key footprint=file:Weidmuller_1510460000 npins=3 # FPC connector for the DUT J2: hier=dut_if.fpc_conn manufacturer=Hirose manufacturer_part_number=FH12-40S-0.5SH description=FPC connector, 40 positions vendor=Digi-Key vendor_part_number=HFJ140CT-ND footprint=FH12_40S_05SH_1R # pin 1 on the right npins=42 # 40 + 2 mounting pads # Dual UART header J3: hier=uart_if.uart_header footprint=HEADER10_2 description=Header, 0.100", dual row, 10 posts manufacturer=Molex manufacturer_part_number=0901310125 vendor=Digi-Key vendor_part_number=WM50035-10-ND npins=10 # SIM socket J4: hier=sim.socket description=SIM socket, full size, hinged manufacturer=Molex manufacturer_part_number=0473882001 vendor=Digi-Key vendor_part_number=WM3292CT-ND footprint=file:SIM_Socket_473882001 pinout=SIM_Socket_473882001.pinout npins=8 part header-2pin: footprint=JUMPER2 description=Header, 0.100", 2 posts manufacturer=Molex manufacturer_part_number=0901200122 vendor=Digi-Key vendor_part_number=WM8072-ND npins=2 # Earpiece speaker J5: hier=J5 part=header-2pin # Microphone J6: hier=J6 part=header-2pin part pushbutton-smt-ti: manufacturer=Omron manufacturer_part_number=B3S-1000 description=Tactile switch, SPNO, SMT vendor=Digi-Key vendor_part_number=SW415-ND footprint=file:Omron_B3S_1000 npins=4 # PWON button K1: hier=pwr_btn.pkg part=pushbutton-smt-ti # nTESTRESET button K2: hier=reset_btn.pkg part=pushbutton-smt-ti # MOSFET for driving the power on LED Q1: hier=led.Q device=Si1032R pinout=Si1032R.pinout footprint=SC75A npins=3 description=N-channel MOSFET, 1.5V logic level gate, SC75A manufacturer=Vishay Siliconix manufacturer_part_number=SI1032R-T1-GE3 vendor=Digi-Key vendor_part_number=SI1032R-T1-GE3CT-ND # power on LED series resistor R1: hier=led.R value=470 footprint=0603 description=Chip resistor, 470 ohm, 1%, 0603 manufacturer=Yageo manufacturer_part_number=RC0603FR-07470RL vendor=Digi-Key vendor_part_number=311-470HRCT-ND npins=2