The TL7660CP comes in an 8-pin PDIP (0.300" wide, 7.62 mm pitch) — a through-hole package that takes standard 0.100" breadboard or perfboard. The 8-DIP footprint is roomy enough for hand wiring or a simple two-layer PCB; no fine-pitch fan-out needed. Pin 1 is clearly marked with a notch and dot, so orientation under the hot-air station is unambiguous. The plastic DIP body is MSL Level 1 — no bake required before soldering, even after long shelf storage.
What the charge pump does and how to size it
This is a ratiometric charge pump IC that generates either a negative voltage equal to -Vin or a doubled positive output (2Vin) from a single input rail between 1.5 V and 10 V. The switching frequency is fixed at 10 kHz, so the external pump capacitors should be chosen for that rate — typically 10 µF for the flying and reservoir caps. No inductor needed; the charge pump topology keeps the BOM small and the noise spectrum predictable. With a single output rated for up to 20 mA, this part suits op-amp bias rails, RS-232 level shifters, or LCD contrast supplies — not high-current loads. The lack of synchronous rectification means efficiency drops at light load; expect around 90 % at 10 mA, falling off below 1 mA.