component
LM2917N-8
Public Made by Adomby adom
Texas Instruments V/F And F/V Converters, PDIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LM2917N-8
Texas Instruments · V/F And F/V Converters · PDIP-8
LM2917N-8 from Texas Instruments, in a PDIP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TACH+ | input | Positive terminal of the tachometer input signal, feeding the noninverting input of the internal Schmitt-trigger comparator. |
| 2 | CP1 | output | Charge-pump capacitor pin, charged to VCC/2 by a constant current source of 180 µA typical at the start of every positive half cycle and discharged at the same rate during negative half cycles. |
| 3 | CP2/IN+ | bidirectional | Shared pin on 8-pin devices serving as the noninverting input of the high-gain op amp, internally connected to the CP2 charge-pump node. |
| 4 | EMIT | output | Emitter of the bipolar junction transistor, which is the floating transistor output of the op amp section. |
| 5 | COL | input | Collector of the bipolar junction transistor; the collector may be taken above VCC up to a maximum VCE of 28 V. |
| 6 | V+ | power_in | Supply voltage pin; absolute maximum supply voltage is 28 V. |
| 7 | IN- | input | Inverting input to the high-gain op amp, with op amp and comparator input voltage rated 0 to 28 V. |
| 8 | TACH-/GND | input | Negative terminal of the tachometer input signal, internally connected to ground and must be tied to ground externally to provide the device reference voltage; 8-pin input voltage rated -28 V to 28 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-8 |
| Category | Data Acquisition |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
LM2917N-8 - Footprint:
Package_DIP:DIP-8_W7.62mm - 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files:
lm2917n-8-etched.step/lm2917n-8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2917n-8.step/lm2917n-8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (44 pp, sha256
7eb159d92fb097b9, retrieved 2026-10-10, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# LM2917N-8
**Texas Instruments** · V/F And F/V Converters · PDIP-8
LM2917N-8 from Texas Instruments, in a PDIP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TACH+ | input | Positive terminal of the tachometer input signal, feeding the noninverting input of the internal Schmitt-trigger comparator. |
| 2 | CP1 | output | Charge-pump capacitor pin, charged to VCC/2 by a constant current source of 180 µA typical at the start of every positive half cycle and discharged at the same rate during negative half cycles. |
| 3 | CP2/IN+ | bidirectional | Shared pin on 8-pin devices serving as the noninverting input of the high-gain op amp, internally connected to the CP2 charge-pump node. |
| 4 | EMIT | output | Emitter of the bipolar junction transistor, which is the floating transistor output of the op amp section. |
| 5 | COL | input | Collector of the bipolar junction transistor; the collector may be taken above VCC up to a maximum VCE of 28 V. |
| 6 | V+ | power_in | Supply voltage pin; absolute maximum supply voltage is 28 V. |
| 7 | IN- | input | Inverting input to the high-gain op amp, with op amp and comparator input voltage rated 0 to 28 V. |
| 8 | TACH-/GND | input | Negative terminal of the tachometer input signal, internally connected to ground and must be tied to ground externally to provide the device reference voltage; 8-pin input voltage rated -28 V to 28 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | PDIP-8 |
| Category | Data Acquisition |
| Pins | 8 |
## CAD (KiCad official)
- Symbol: `LM2917N-8`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `lm2917n-8-etched.step` / `lm2917n-8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2917n-8.step` / `lm2917n-8.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/lm2917-n) (44 pp, sha256 `7eb159d92fb097b9`, retrieved 2026-10-10, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/lm2917n-8-datasheet.pdf)