SN74HC688PWR

@@ -0,0 +1,70 @@+# SN74HC688PWR++**Texas Instruments** · Comparators · TSSOP-20++SN74HC688PWR from Texas Instruments, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | OE | input | Active-low output enable. When held high, the P=Q output is forced to the high level regardless of the data inputs; when held low, the comparator output reflects the P vs Q comparison. |+| 2 | P0 | input | Bit 0 of the P input word. Compared against Q0 by an internal XNOR stage; must be driven to a valid CMOS level (VIH/VIL per Recommended Operating Conditions). |+| 3 | Q0 | input | Bit 0 of the Q input word. Compared against P0 by an internal XNOR stage. |+| 4 | P1 | input | Bit 1 of the P input word. Compared against Q1. |+| 5 | Q1 | input | Bit 1 of the Q input word. Compared against P1. |+| 6 | P2 | input | Bit 2 of the P input word. Compared against Q2. |+| 7 | Q2 | input | Bit 2 of the Q input word. Compared against P2. |+| 8 | P3 | input | Bit 3 of the P input word. Compared against Q3. |+| 9 | Q3 | input | Bit 3 of the Q input word. Compared against P3. |+| 10 | GND | power_in | Ground reference (0 V). Return path for VCC supply current and logic input/output reference. |+| 11 | P4 | input | Bit 4 of the P input word. Compared against Q4. |+| 12 | Q4 | input | Bit 4 of the Q input word. Compared against P4. |+| 13 | P5 | input | Bit 5 of the P input word. Compared against Q5. |+| 14 | Q5 | input | Bit 5 of the Q input word. Compared against P5. |+| 15 | P6 | input | Bit 6 of the P input word. Compared against Q6. |+| 16 | Q6 | input | Bit 6 of the Q input word. Compared against P6. |+| 17 | P7 | input | Bit 7 (MSB) of the P input word. Compared against Q7. |+| 18 | Q7 | input | Bit 7 (MSB) of the Q input word. Compared against P7. |+| 19 | P=Q | output | Active-low equality output. Drives low when all eight P bits equal the corresponding Q bits and OE is low; drives high otherwise or whenever OE is high. Rated for ±4 mA drive at 5 V (up to 10 LSTTL loads). |+| 20 | VCC | power_in | Positive supply voltage, 2 V to 6 V (5 V nominal). A 0.1-µF bypass capacitor placed close to this pin is recommended; paralleling with a 1-µF cap is common. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | TSSOP-20 |+| Category | Op-amp/Cmp |+| Pins | 20 |++## Ordering variants++Same part, different packaging or reel option.++- `SN74HC688PWR`+- `SN74HC688PWRE4`+- `SN74HC688PWRPWT`+- `SN74HC688PWRDW`+- `SN74HC688PWRDWR`+- `SN74HC688PWRDWRE4`+- `SN74HC688PWRDWRG4`+- `SN74HC688PWRN`+- `SN74HC688PWRJ`+- `SN74HC688PWRFK`++## CAD (KiCad official)++- Symbol: `SN74HC688PWR`+- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`+- 3D model: TSSOP-20 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn74hc688.pdf) (24 pp, sha256 `d600a33f4ebb7089`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/sn74hc688pwr-datasheet.pdf)

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