| IC number | Manufacturer | Documentation |
|---|---|---|
| NE556 | Texas Instruments | Web page, Datasheet (PDF) |
| Signetics (now Philips) | Web page, Datasheet (PDF) | |
| LM556 | National Semiconductor (now Texas Instruments) | Not available |
| NJM556 | New Japan Radio | Datasheet (PDF) |
| RC556 | Raytheon Semiconductors | Not available |
| Package | CBM part number | CBM part description | Replacement parts |
|---|---|---|---|
| 14-pin DIP | 901523-03 | Lin Dual Timer NE556 |
NE556 available from: Conrad Electronic NE556N available from: Conrad Electronic |
| Device | Position | Package |
|---|---|---|
| A2300 | IC16 | DIP |
| A2301 | IC16 | DIP |
| A1000 keyboard PCB | DIP | |
| KIM-I | U25 | DIP |
| C64 | U20 | DIP |
| C64C B-3 board | U20 | DIP |
| SX 64 I/O board | UE3 | DIP |
| C128 | U27 | DIP |
| C128D CR | U27 | DIP |
| CBM II lo-profile | U97 | DIP |
| CBM II hi-profile | U20 | DIP |
| Pin | Timer | Function |
|---|---|---|
| 1 | 1 | Discharge |
| 2 | 1 | Threshold |
| 3 | 1 | Control Voltage |
| 4 | 1 | Reset |
| 5 | 1 | Output |
| 6 | 1 | Trigger |
| 7 | both | GND |
| 8 | 2 | Trigger |
| 9 | 2 | Output |
| 10 | 2 | Reset |
| 11 | 2 | Control Voltage |
| 12 | 2 | Threshold |
| 13 | 2 | Discharge |
| 14 | both | VCC |
Copyright © 2003-2010 Ronald van Dijk - All rights reserved
Last update: 8 August 2010