Parts · ICs
TC7662B
Charge Pump Voltage Converter DIP-8 / SOIC-8.2 circuits use this part.
Datasheet · from ww1.microchip.com
Substitutes same socket
Parts that fit the same socket: the same function, pin count and pinout. The figures are read off each part's datasheet (this one's from page 3), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.
This part
| Part | Supply | Iout | Osc | Boards |
|---|---|---|---|---|
| TC7662B | 1.5–15 V | 10 kHz | 4 |
7660 drop-in that takes up to 15 V; tying pin 1 (boost) to V+ raises the clock to 35 kHz.
Fits the same socket
| Part | Supply | Iout | Osc | Boards | Differs |
|---|---|---|---|---|---|
| TC1044 | 1.5–12 V | 10 kHz | 289 | Boost pin to V+ raises the oscillator from 10 kHz to 45 kHz, out of the audio band; 12 V maximum, so not for 18 V doublers. | |
| 7660S | 1.5–12 V | 10 kHz | 202 | Takes up to 12 V and needs no protection diode; tying pin 1 (boost) to V+ raises the clock from 10 kHz to 35 kHz, out of the audio band. | |
| 7660 | 1.5–10 V | 10 kHz | 15 | pins 1, 6, 7: NC, LV, OSC. Rated to only 10 V (10.5 V absolute), so a hot 9 V adapter is near its limit; the 10 kHz clock can whine in the audio. |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| The Windbag BS170 · BTDR-3 · J175 · OPA2134 VFE Yodeler Delay + Reverb · 125B | VFE Yodeler Delay + Reverb | Delay | Madbean | 125B | 2 | — | 71 | |
| v.3 Switching Board BS170 · J175 · PIC12F509 · TC7662B Used for original VFE projects | Used for original VFE projects | Utility | Madbean | — | — | — | 22 |