Bill of Materials

This is a list of components you need to build the OpenTendo NES. You will need some components from the original NES and have to order more modern components.

From the OEM NES

Reference	Qty	Part	Description
U5	1	RP2C02	PPU
U6	1	RP2A03	CPU
Q1	1	A937	Epitaxial planar PNP transistor
Q2, Q3	2	C2021	3 pin small signal bipolar transistor
DA1, DA3	2	DAN601	6 pin small signal diode array
P2	1	Connector	48 pin expansion port
P6	1	Connector	5 pin connector for the power/reset breakout board

Alternatives

Reference	Qty	Part	Description
Q1	1	2SA937^[1]	Epitaxial planar PNP transistor
Q2, Q3	2	2SC2021^[2]	3 pin small signal bipolar transistor
DA1, DA3	2	DAN601^[3]	6 pin small signal diode array
P2	2	PPPC241LFBN-RC^[4]	24 Pins Header Connector 0.100" (2.54mm) Through Hole

Note

^[1][2][3] These components are discontinued and difficult to find. If you could find them, we recommend replacing the OEM. If not, the OEM components should still be fine.

^[4] If you don't want to use the OEM expansion port, you can replace it with a header pin connector or not put anything at all. OpenTendo should still work without the expansion port.

What to buy

We recommend using Octopart's BOM tool and import the BOM.csv. This tool makes ordering from multiple Octopart's authorized distributors (Digikey, Mouser, etc.) easier.

Resistors

Reference	Qty	Part	Description
RA1	1	4613X-101-103LF	10k Ohm ±2% 200mW Bussed 12 Resistor Array 13-SIP
R1	1	RNF14FTD1M00	1M OHM 1% 1/4W
R2, R12	2	CF18JT510R	510 OHM 5% 1/8W
R3, R4	2	CF18JT100R	100 OHM 5% 1/8W
R5	1	CF18JT220R	220 OHM 5% 1/8W
R6	1	CF18JT47K0	47K OHM 5% 1/8W
R7, R9	2	CF18JT20K0	20K OHM 5% 1/8W
R8	1	CF18JT12K0	12K OHM 5% 1/8W
R10	1	CF18JT220K	220K OHM 5% 1/8W
R11	1	CF18JT1K20	1.2K OHM 5% 1/8W
R13	1	CFR-25JB-52-150K	150K OHM 5% 1/4W
R17	1	CF14JT2K20	2.2K OHM 5% 1/4W
R18, R19	2	CF18JT1K00	1K OHM 5% 1/8W

Capacitors

Reference	Qty	Part	Description
BC1, BC2	2	K153K10X7RF5UH5	0.015 µF 50V Ceramic Capacitor
C1	1	ECE-A0JKA101I	100 µF 6.3 V Electrolytic Capacitor
C2, C3, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C22, C24, C26, C32, C38, C39, C40	19	K103K10X7RF5UH5	10000 pF 50V Ceramic Capacitor
C4	1	K221K15X7RF5TH5	220 pF 50V Ceramic Capacitor 5mm
C5, C27, C28, C29, C30, C31, C33, C34, C35, C36, C37	11	K331K15X7RF53L2	330 pF 50V Ceramic Capacitor
C8, C46	2	K104K15X7RF5UH5	0.1 µF 50V Ceramic Capacitor
C9	1	ECA-1HHG2R2I	2.2 µF 50 V Electrolytic Capacitor
C20, C43, C45	3	K560J15C0GF5TL2	56 pF 50V Ceramic Capacitor
C21, C44	2	K221K15X7RF5TL2	220 pF 50V Ceramic Capacitor 2.5mm
C23	1	UVR2A010MDD1TD	1 µF 100 V Electrolytic Capacitor
C41	1	FG18C0G1H180JNT00	18 pF 50V Ceramic Capacitor
C42	1	K150J15C0GF5TL2	15 pF 50V Ceramic Capacitor

ICs

Reference	Qty	Part	Description
U1, U4	2	6116SA15SOG^[1]	SRAM Chip Async Single 5V 16K-Bit 2K x 8 15ns 24-Pin SOIC
U2	1	SN74HC373N	D-Type Transparent Latch 1 Channel 8:8 IC Tri-State 20-PDIP
U3	1	SN74HC139N	Decoder/Demultiplexer 1 x 2:4 16-PDIP
U7, U8	2	SN74HC368N	Buffer, Inverting 2 Element 2, 4 (Hex) Bit per Element 3-State Output 16-PDIP
U9	1	SN74HCU04N	Inverter IC 6 Channel 14-PDIP

Alternatives

Reference	Qty	Part	Description
U1, U4	2	6116SA15TPG	SRAM - Asynchronous Memory IC 16Kb (2K x 8) Parallel 15ns 24-PDIP

Note

^[1] This component is an SOIC. You would need an SOIC to DIP adaptor (PA0009), listed in Others, to be able to use this component. If you're not comfortable working with SOIC, We recommend looking for the alternative 6116SA15TPG or use the SRAM from the OEM NES.

Connectors

Reference	Qty	Part	Description
U5, U6	2	ED40DT	40 (2 x 20) Pos DIP, 0.6" (15.24mm) Row Spacing Socket Tin Through Hole
P4, P5	2	S7B-PH-K-S(LF)(SN)	JST PH 2mm 7 Pins Male

Others

Reference	Qty	Part	Description
X1	1	ECS-214-S-4X	21.47727MHz Crystal
X2	1	CSTLS4M00G56-B0	4 MHz Ceramic Resonator Built in Capacitor 47 pF
D1, D2	2	1N5231BTR	Zener Diode 5.1 V 500 mW Through Hole
FC1	1	B78108S1393K	39 µH Unshielded Drum Core, Wirewound Inductor 470 mA 1.02Ohm Max Axial
FC2	1	28L0138-10R-10	75 Ohms @ 100 MHz 1 Ferrite Bead Axial 5A 10mOhm
U1, U4	2	PA0009^[1]	SOIC-24 to DIP-24 SMT Adapte

Note

^[1] You only need this adaptor if you're using the 6116SA15SOG SRAM.