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BOM.txt
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#Bill of Materials
_Note_ Some of the values (Resistors and condensers) are approximations. Take them with a grain of salt.
| Name | Model | Description | Notes |
| U1 | N/A | Not connected | Looks like a beefier voltage regulator |
| U2 | TPS76601 | 5.5V Voltage regulator | |
| U3 | N/A | Not connected | A voltage supervisor maybe? |
| U4 | BS250 | Enhancement mode MOSFET | |
| U5 | MM74GC86M | Quad 2-input OR | |
| U8,U9 | 74VHC244 | Octal Line Driver | |
| U10 | MM74HC374WM | Tristate Octuple D Flip Flop | |
| U11 | PIC16C54C | 8-bit microcontroller | Manages IR communications |
| U12 | PHR? | _Too small to identify_ | Maybe a voltage regulator? |
| U14 | Z8S18010VSG | Z180 Microprocessor | |
| U17 | CY62138F | 2-Mbit (256k) SRAM | |
| U18 | M27C801 | 8-Mbit (1MB) UV-EPROM | |
| U19 | 74HC138D | 3-to-8 Line Decoder | |
| U20 | 74GC00M | Quad NAND Gate | |
| U21 | 74HC139B | Dual 2-to-4 Line Decoder | |
| Y1 | 32C821 | Unknown Crystal Oscillator | I think is a 32.768 khz oscillator |
| Y2 | 6.14ECSR | Unknown Crystal Oscillator | 6.14 Mhz crystal for the Z180 |
| D1-D8 | N/A | Unknown radial diode | The closest thing I have is a 1N4148 |
| D13,D14 | V4H | Zener Diode 2.4V 150mW | |
| D15 | N/A | Not Connected | |
| D16 | N/A | Not Connected | |
| D17 | V4H | Zener Diode 2.4V 150mW | |
| LED1 | N/A | IR Led | |
| Q1-Q3 | 589 | BD589 NPN Transistor | |
| C2,C3 | | 900nF | |
| C10 | | 100nF | |
| C13 | | 180pF | |
| C14 | N/A | Not connected | |
| C15 | | 450pF | |
| C16 | | 900nF | |
| C17,C18 | | 150pF | |
| C19-C21 | | 100nF | |
| C22 | | 900nF | |
| C27 | | 380pF | |
| C28 | | 500pF | |
| C30,C31 | | 100nF | |
| C33 | | 100nF | |
| C36 | N/A | Not connected | |
| C37 | | 100nF | |
| C38 | GC5.5V0.22F | | Helps changing batteries |
| C39 | | 100nF | |
| R4 | | 100k | |
| R5 | | 1k | |
| R6 | | 10k | |
| R7 | | 165k | |
| R8 | | 100k | |
| R9 | | 300k | |
| R10 | | 100k | |
| R11 | | 2200 | |
| R12 | | 470k | |
| R13 | | 100k | |
| R14 | | 33k | |
| R15 | | 1k | |
| R16 | | 100k | |
| R17,R18 | | 100 | |
| R19 | | 10k | |
| R20,R21 | | 100k | |
| R22,R23 | | 1k | |
| R24 | | 220k | |
| R25 | | 0 (shunt) | |
| R26 | N/A | Not connected | |
| R27,R28 | | 22k | |
| R29 | | 10k | |
| RN1,RN2 | L101C103 | 10 pin 10k Resistor Network | |
| POT1 | 103 | 10k 90º TH Potentiometer | Contrast adjust for screen |
| L1 | 100J | 1uH inductor | |
| KB1 | N/A | 28x1 TH Flat Cable Connector | Connector for the keyboard |
| J1 | N/A | 6pin TH 90º RJ Connector | Unknown use. Printer? |
| LCD1 | N/A | 8x2 TH 2.54 Male Connector | Connector for the screen |
| H1 | N/A | Not Connected | Probably for external power |
| H2 | N/A | 2 pin TH JSX 90º Connector | Connector for the battery |
| SW1 | N/A | 90º TH Momentary Switch | Reset button |
_To do:_ check led diameter, check flat cable connector pitch, check front face resistor values.