component
74HC688D
Public Made by Adomby adom
Nexperia Digital Comparators, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
74HC688D
Nexperia · Digital Comparators · SOIC-20-300mil
74HC688D from Nexperia, in a SOIC-20-300mil. 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 | E | input | Enable input (active LOW); when HIGH, the P=Q output is forced HIGH regardless of the word inputs. |
| 2 | P0 | input | Word P input, bit 0, of the 8-bit magnitude comparator. |
| 3 | Q0 | input | Word Q input, bit 0, of the 8-bit magnitude comparator. |
| 4 | P1 | input | Word P input, bit 1, of the 8-bit magnitude comparator. |
| 5 | Q1 | input | Word Q input, bit 1, of the 8-bit magnitude comparator. |
| 6 | P2 | input | Word P input, bit 2, of the 8-bit magnitude comparator. |
| 7 | Q2 | input | Word Q input, bit 2, of the 8-bit magnitude comparator. |
| 8 | P3 | input | Word P input, bit 3, of the 8-bit magnitude comparator. |
| 9 | Q3 | input | Word Q input, bit 3, of the 8-bit magnitude comparator. |
| 10 | GND | power_in | Ground (0 V) reference for all voltages on the device. |
| 11 | P4 | input | Word P input, bit 4, of the 8-bit magnitude comparator. |
| 12 | Q4 | input | Word Q input, bit 4, of the 8-bit magnitude comparator. |
| 13 | P5 | input | Word P input, bit 5, of the 8-bit magnitude comparator. |
| 14 | Q5 | input | Word Q input, bit 5, of the 8-bit magnitude comparator. |
| 15 | P6 | input | Word P input, bit 6, of the 8-bit magnitude comparator. |
| 16 | Q6 | input | Word Q input, bit 6, of the 8-bit magnitude comparator. |
| 17 | P7 | input | Word P input, bit 7, of the 8-bit magnitude comparator. |
| 18 | Q7 | input | Word Q input, bit 7, of the 8-bit magnitude comparator. |
| 19 | P=Q | output | Equal-to output; HIGH when the P and Q words are equal and E is LOW. |
| 20 | VCC | power_in | Supply voltage; recommended operating range 2.0 V to 6.0 V, absolute maximum +7 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOIC-20-300mil |
| Category | Logic ICs |
| Pins | 20 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 | 7 | V | 4 | ||
| input clamping current | IIK | -20 | 20 | mA | VI < -0.5 V or VI > VCC + 0.5 V | 4 | |
| output clamping current | IOK | -20 | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 4 | |
| output current | IO | -25 | 25 | mA | -0.5 V < VO < VCC + 0.5 V | 4 | |
| supply current | ICC | 50 | mA | 4 | |||
| ground current | IGND | -50 | mA | 4 | |||
| storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| total power dissipation | Ptot | 500 | mW | Tamb = -40 °C to +125 °C | 4 | ||
| supply voltage | VCC | 2 | 5 | 6 | V | 4 | |
| input voltage | VI | 0 | V | 4 | |||
| output voltage | VO | 0 | V | 4 | |||
| ambient temperature | Tamb | -40 | 125 | °C | 4 | ||
| input transition rise and fall rate | Δt/ΔV | 625 | ns/V | VCC = 2.0 V | 4 | ||
| input transition rise and fall rate | Δt/ΔV | 1.67 | 139 | ns/V | VCC = 4.5 V | 4 | |
| input transition rise and fall rate | Δt/ΔV | 83 | ns/V | VCC = 6.0 V | 4 | ||
| HIGH-level input voltage | VIH | 1.5 | 1.2 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 | |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | V | VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | V | VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| LOW-level input voltage | VIL | 0.8 | 0.5 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 | |
| LOW-level input voltage | VIL | 2.1 | 1.35 | V | VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| LOW-level input voltage | VIL | 2.8 | 1.8 | V | VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 1.9 | 2 | V | IO = -20 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | IO = -20 μA; VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 5.9 | 6 | V | IO = -20 μA; VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 3.7 | 4.32 | V | IO = -4.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| HIGH-level output voltage | VOH | 5.2 | 5.81 | V | IO = -5.2 mA; VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| LOW-level output voltage | VOL | 0 | 0.1 | V | IO = 20 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 | |
| LOW-level output voltage | VOL | 0.15 | 0.4 | V | IO = 4.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 | |
| LOW-level output voltage | VOL | 0.16 | 0.4 | V | IO = 5.2 mA; VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| input leakage current | II | -1 | 1 | μA | VI = VCC or GND; VCC = 6.0 V; -40 °C to +125 °C | 5 | |
| supply current | ICC | 160 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; -40 °C to +125 °C | 5 | ||
| propagation delay Pn, Qn to P=Q | tpd | 55 | 255 | ns | Pn, Qn to P=Q; see Fig. 6; VCC = 2.0 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| propagation delay Pn, Qn to P=Q | tpd | 20 | 51 | ns | Pn, Qn to P=Q; see Fig. 6; VCC = 4.5 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| propagation delay Pn, Qn to P=Q | tpd | 16 | 43 | ns | Pn, Qn to P=Q; see Fig. 6; VCC = 6.0 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| propagation delay E to P=Q | tpd | 28 | 180 | ns | E to P=Q; see Fig. 7; VCC = 2.0 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| propagation delay E to P=Q | tpd | 10 | 36 | ns | E to P=Q; see Fig. 7; VCC = 4.5 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| propagation delay E to P=Q | tpd | 8 | 31 | ns | E to P=Q; see Fig. 7; VCC = 6.0 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| transition time | tt | 19 | 110 | ns | see Fig. 7; VCC = 2.0 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| transition time | tt | 7 | 22 | ns | see Fig. 7; VCC = 4.5 V; CL = 50 pF; -40 °C to +125 °C | 6 | |
| transition time | tt | 6 | 19 | ns | see Fig. 7; VCC = 6.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
CAD (KiCad official)
- Symbol:
74HC688D - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
74hc688d-etched.step/74hc688d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74hc688d.step/74hc688d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (13 pp, sha256
00ed18a419caa8e3, retrieved 2026-10-29, tier: manufacturer) - 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).
# 74HC688D
**Nexperia** · Digital Comparators · SOIC-20-300mil
74HC688D from Nexperia, in a SOIC-20-300mil. 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 | E | input | Enable input (active LOW); when HIGH, the P=Q output is forced HIGH regardless of the word inputs. |
| 2 | P0 | input | Word P input, bit 0, of the 8-bit magnitude comparator. |
| 3 | Q0 | input | Word Q input, bit 0, of the 8-bit magnitude comparator. |
| 4 | P1 | input | Word P input, bit 1, of the 8-bit magnitude comparator. |
| 5 | Q1 | input | Word Q input, bit 1, of the 8-bit magnitude comparator. |
| 6 | P2 | input | Word P input, bit 2, of the 8-bit magnitude comparator. |
| 7 | Q2 | input | Word Q input, bit 2, of the 8-bit magnitude comparator. |
| 8 | P3 | input | Word P input, bit 3, of the 8-bit magnitude comparator. |
| 9 | Q3 | input | Word Q input, bit 3, of the 8-bit magnitude comparator. |
| 10 | GND | power_in | Ground (0 V) reference for all voltages on the device. |
| 11 | P4 | input | Word P input, bit 4, of the 8-bit magnitude comparator. |
| 12 | Q4 | input | Word Q input, bit 4, of the 8-bit magnitude comparator. |
| 13 | P5 | input | Word P input, bit 5, of the 8-bit magnitude comparator. |
| 14 | Q5 | input | Word Q input, bit 5, of the 8-bit magnitude comparator. |
| 15 | P6 | input | Word P input, bit 6, of the 8-bit magnitude comparator. |
| 16 | Q6 | input | Word Q input, bit 6, of the 8-bit magnitude comparator. |
| 17 | P7 | input | Word P input, bit 7, of the 8-bit magnitude comparator. |
| 18 | Q7 | input | Word Q input, bit 7, of the 8-bit magnitude comparator. |
| 19 | P=Q | output | Equal-to output; HIGH when the P and Q words are equal and E is LOW. |
| 20 | VCC | power_in | Supply voltage; recommended operating range 2.0 V to 6.0 V, absolute maximum +7 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOIC-20-300mil |
| Category | Logic ICs |
| Pins | 20 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| supply voltage | VCC | -0.5 | | 7 | V | | 4 |
| input clamping current | IIK | -20 | | 20 | mA | VI < -0.5 V or VI > VCC + 0.5 V | 4 |
| output clamping current | IOK | -20 | | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 4 |
| output current | IO | -25 | | 25 | mA | -0.5 V < VO < VCC + 0.5 V | 4 |
| supply current | ICC | | | 50 | mA | | 4 |
| ground current | IGND | -50 | | | mA | | 4 |
| storage temperature | Tstg | -65 | | 150 | °C | | 4 |
| total power dissipation | Ptot | | | 500 | mW | Tamb = -40 °C to +125 °C | 4 |
| supply voltage | VCC | 2 | 5 | 6 | V | | 4 |
| input voltage | VI | 0 | | | V | | 4 |
| output voltage | VO | 0 | | | V | | 4 |
| ambient temperature | Tamb | -40 | | 125 | °C | | 4 |
| input transition rise and fall rate | Δt/ΔV | | | 625 | ns/V | VCC = 2.0 V | 4 |
| input transition rise and fall rate | Δt/ΔV | | 1.67 | 139 | ns/V | VCC = 4.5 V | 4 |
| input transition rise and fall rate | Δt/ΔV | | | 83 | ns/V | VCC = 6.0 V | 4 |
| HIGH-level input voltage | VIH | 1.5 | 1.2 | | V | VCC = 2.0 V; -40 °C to +125 °C | 5 |
| HIGH-level input voltage | VIH | 3.15 | 2.4 | | V | VCC = 4.5 V; -40 °C to +125 °C | 5 |
| HIGH-level input voltage | VIH | 4.2 | 3.2 | | V | VCC = 6.0 V; -40 °C to +125 °C | 5 |
| LOW-level input voltage | VIL | | 0.8 | 0.5 | V | VCC = 2.0 V; -40 °C to +125 °C | 5 |
| LOW-level input voltage | VIL | | 2.1 | 1.35 | V | VCC = 4.5 V; -40 °C to +125 °C | 5 |
| LOW-level input voltage | VIL | | 2.8 | 1.8 | V | VCC = 6.0 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 1.9 | 2 | | V | IO = -20 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | | V | IO = -20 μA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 5.9 | 6 | | V | IO = -20 μA; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 3.7 | 4.32 | | V | IO = -4.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| HIGH-level output voltage | VOH | 5.2 | 5.81 | | V | IO = -5.2 mA; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| LOW-level output voltage | VOL | | 0 | 0.1 | V | IO = 20 μA; VCC = 2.0 V; -40 °C to +125 °C | 5 |
| LOW-level output voltage | VOL | | 0.15 | 0.4 | V | IO = 4.0 mA; VCC = 4.5 V; -40 °C to +125 °C | 5 |
| LOW-level output voltage | VOL | | 0.16 | 0.4 | V | IO = 5.2 mA; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| input leakage current | II | -1 | | 1 | μA | VI = VCC or GND; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| supply current | ICC | | | 160 | μA | VI = VCC or GND; IO = 0 A; VCC = 6.0 V; -40 °C to +125 °C | 5 |
| propagation delay Pn, Qn to P=Q | tpd | | 55 | 255 | ns | Pn, Qn to P=Q; see Fig. 6; VCC = 2.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| propagation delay Pn, Qn to P=Q | tpd | | 20 | 51 | ns | Pn, Qn to P=Q; see Fig. 6; VCC = 4.5 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| propagation delay Pn, Qn to P=Q | tpd | | 16 | 43 | ns | Pn, Qn to P=Q; see Fig. 6; VCC = 6.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| propagation delay E to P=Q | tpd | | 28 | 180 | ns | E to P=Q; see Fig. 7; VCC = 2.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| propagation delay E to P=Q | tpd | | 10 | 36 | ns | E to P=Q; see Fig. 7; VCC = 4.5 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| propagation delay E to P=Q | tpd | | 8 | 31 | ns | E to P=Q; see Fig. 7; VCC = 6.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| transition time | tt | | 19 | 110 | ns | see Fig. 7; VCC = 2.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| transition time | tt | | 7 | 22 | ns | see Fig. 7; VCC = 4.5 V; CL = 50 pF; -40 °C to +125 °C | 6 |
| transition time | tt | | 6 | 19 | ns | see Fig. 7; VCC = 6.0 V; CL = 50 pF; -40 °C to +125 °C | 6 |
## CAD (KiCad official)
- Symbol: `74HC688D`
- Footprint: `Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm`
- 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files: `74hc688d-etched.step` / `74hc688d-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `74hc688d.step` / `74hc688d.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/74HC688D.pdf) (13 pp, sha256 `00ed18a419caa8e3`, retrieved 2026-10-29, tier: manufacturer)
- **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/74hc688d-datasheet.pdf)