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
line wrap: on
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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