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74HC688D

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Nexperia Digital Comparators, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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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 (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