component
74AHC573BQ
Public Made by Adomby adom
Nexperia Latches, DHVQFN-20(2.5x4.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown74AHC573BQ
Nexperia · Latches · DHVQFN-20(2.5x4.5)
74AHC573BQ from Nexperia, in a DHVQFN-20(2.5x4.5). 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 | OE | input | Output enable input (active LOW); a HIGH level puts outputs Q0 to Q7 into the high-impedance OFF-state and does not affect the latch contents. |
| 2 | D0 | input | Data input for latch 0; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 3 | D1 | input | Data input for latch 1; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 4 | D2 | input | Data input for latch 2; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 5 | D3 | input | Data input for latch 3; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 6 | D4 | input | Data input for latch 4; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 7 | D5 | input | Data input for latch 5; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 8 | D6 | input | Data input for latch 6; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 9 | D7 | input | Data input for latch 7; inputs are overvoltage tolerant to 5.5 V and have Schmitt-trigger action. |
| 10 | GND | power_in | Ground (0 V); all voltages in the datasheet are referenced to this pin. |
| 11 | LE | input | Latch enable input (active HIGH); when HIGH the latches are transparent, and when LOW they store the data present at the inputs. |
| 12 | Q7 | tri_state | 3-state data output of latch 7; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 13 | Q6 | tri_state | 3-state data output of latch 6; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 14 | Q5 | tri_state | 3-state data output of latch 5; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 15 | Q4 | tri_state | 3-state data output of latch 4; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 16 | Q3 | tri_state | 3-state data output of latch 3; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 17 | Q2 | tri_state | 3-state data output of latch 2; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 18 | Q1 | tri_state | 3-state data output of latch 1; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 19 | Q0 | tri_state | 3-state data output of latch 0; high-impedance when OE is HIGH, with output current limited to ±25 mA. |
| 20 | VCC | power_in | Supply voltage; 2.0 V to 5.5 V for 74AHC573 and 4.5 V to 5.5 V for 74AHCT573, with an absolute maximum of 7.0 V. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | DHVQFN-20(2.5x4.5) |
| Category | Logic |
| Pins | 21 |
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 | 5 | ||
| Input voltage | VI | -0.5 | 7 | V | 5 | ||
| Input clamping current | IIK | -20 | mA | VI < -0.5 V | 5 | ||
| Output clamping current | IOK | -20 | 20 | mA | VO < -0.5 V or VO > VCC + 0.5 V | 5 | |
| Output current | IO | -25 | 25 | mA | VO = -0.5 V to (VCC + 0.5 V) | 5 | |
| Supply current | ICC | 75 | mA | 5 | |||
| Ground current | IGND | -75 | mA | 5 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 5 | ||
| Total power dissipation | Ptot | 500 | mW | Tamb = -40 °C to +125 °C | 5 | ||
| Supply voltage | VCC | 2 | 5 | 5.5 | V | 74AHC573 | 5 |
| Input voltage | VI | 0 | 5.5 | V | 74AHC573 | 5 | |
| Output voltage | VO | 0 | V | 74AHC573; max printed as VCC | 5 | ||
| Ambient temperature | Tamb | -40 | 25 | 125 | °C | 74AHC573 | 5 |
| Input transition rise and fall rate | Δt/ΔV | 100 | ns/V | VCC = 3.3 V ± 0.3 V | 5 | ||
| Input transition rise and fall rate | Δt/ΔV | 20 | ns/V | VCC = 5.0 V ± 0.5 V | 5 | ||
| HIGH-level input voltage | VIH | 1.5 | V | VCC = 2.0 V; limits at -40 °C to +125 °C | 6 | ||
| HIGH-level input voltage | VIH | 2.1 | V | VCC = 3.0 V; limits at -40 °C to +125 °C | 6 | ||
| HIGH-level input voltage | VIH | 3.85 | V | VCC = 5.5 V; limits at -40 °C to +125 °C | 6 | ||
| LOW-level input voltage | VIL | 0.5 | V | VCC = 2.0 V; limits at -40 °C to +125 °C | 6 | ||
| LOW-level input voltage | VIL | 0.9 | V | VCC = 3.0 V; limits at -40 °C to +125 °C | 6 | ||
| LOW-level input voltage | VIL | 1.65 | V | VCC = 5.5 V; limits at -40 °C to +125 °C | 6 | ||
| HIGH-level output voltage | VOH | 1.9 | 2 | V | VI = VIH or VIL; IO = -50 μA; VCC = 2.0 V; limits at -40 °C to +125 °C | 6 | |
| HIGH-level output voltage | VOH | 2.9 | 3 | V | VI = VIH or VIL; IO = -50 μA; VCC = 3.0 V; limits at -40 °C to +125 °C | 6 | |
| HIGH-level output voltage | VOH | 4.4 | 4.5 | V | VI = VIH or VIL; IO = -50 μA; VCC = 4.5 V; limits at -40 °C to +125 °C | 6 | |
| HIGH-level output voltage | VOH | 2.4 | V | VI = VIH or VIL; IO = -4.0 mA; VCC = 3.0 V; limits at -40 °C to +125 °C | 6 | ||
| HIGH-level output voltage | VOH | 3.7 | V | VI = VIH or VIL; IO = -8.0 mA; VCC = 4.5 V; limits at -40 °C to +125 °C | 6 | ||
| LOW-level output voltage | VOL | 0 | 0.1 | V | VI = VIH or VIL; IO = 50 μA; VCC = 2.0 V; limits at -40 °C to +125 °C | 6 | |
| LOW-level output voltage | VOL | 0.55 | V | VI = VIH or VIL; IO = 4.0 mA; VCC = 3.0 V; limits at -40 °C to +125 °C | 6 | ||
| OFF-state output current | IOZ | -10 | 10 | μA | VI = VIH or VIL; VO = VCC or GND; VCC = 5.5 V; limits at -40 °C to +125 °C | 6 | |
| Input leakage current | II | 2 | μA | VI = VCC or GND; VCC = 0 V to 5.5 V; limits at -40 °C to +125 °C | 6 | ||
| Supply current | ICC | 80 | μA | VI = VCC or GND; IO = 0 A; VCC = 5.5 V; limits at -40 °C to +125 °C | 6 | ||
| Input capacitance | CI | 3 | 10 | pF | VI = VCC or GND; max at -40 °C to +125 °C | 6 | |
| Output capacitance | CO | 4 | 10 | pF | max at -40 °C to +125 °C | 6 | |
| Propagation delay Dn to Qn | tpd | 1 | 5.5 | 14 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 5; limits at -40 °C to +125 °C | 8 |
| Propagation delay Dn to Qn | tpd | 1 | 7.8 | 18.5 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 5; limits at -40 °C to +125 °C | 8 |
| Propagation delay Dn to Qn | tpd | 1 | 3.9 | 8.5 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 5; limits at -40 °C to +125 °C | 8 |
| Propagation delay Dn to Qn | tpd | 1 | 5.5 | 11 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 5; limits at -40 °C to +125 °C | 8 |
| Propagation delay LE to Qn | tpd | 1 | 5.8 | 15 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 6; limits at -40 °C to +125 °C | 8 |
| Propagation delay LE to Qn | tpd | 1 | 8.3 | 19.5 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 6; limits at -40 °C to +125 °C | 8 |
| Propagation delay LE to Qn | tpd | 1 | 4.2 | 10 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 6; limits at -40 °C to +125 °C | 8 |
| Propagation delay LE to Qn | tpd | 1 | 5.9 | 12.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 6; limits at -40 °C to +125 °C | 8 |
| Enable time OE to Qn | ten | 1 | 5.8 | 14.5 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Enable time OE to Qn | ten | 1 | 8.3 | 19 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Enable time OE to Qn | ten | 1 | 4.4 | 10 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Enable time OE to Qn | ten | 1 | 6.3 | 12.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Disable time OE to Qn | tdis | 1 | 6.8 | 14 | ns | VCC = 3.0 V to 3.6 V; CL = 15 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Disable time OE to Qn | tdis | 1 | 9.7 | 18.5 | ns | VCC = 3.0 V to 3.6 V; CL = 50 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Disable time OE to Qn | tdis | 1 | 4.6 | 10 | ns | VCC = 4.5 V to 5.5 V; CL = 15 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Disable time OE to Qn | tdis | 1 | 7.4 | 12.5 | ns | VCC = 4.5 V to 5.5 V; CL = 50 pF; see Fig. 7; limits at -40 °C to +125 °C | 8 |
| Pulse width LE HIGH | tW | 5 | ns | VCC = 3.0 V to 3.6 V; LE HIGH; see Fig. 6; limits at -40 °C to +125 °C | 8 | ||
| Set-up time Dn to LE | tsu | 3.5 | ns | VCC = 3.0 V to 3.6 V; Dn to LE; see Fig. 8; limits at -40 °C to +125 °C | 8 | ||
| Hold time Dn to LE | th | 1.5 | ns | VCC = 3.0 V to 3.6 V; Dn to LE; see Fig. 8; limits at -40 °C to +125 °C | 8 |
CAD (KiCad official)
- Symbol:
74AHC573BQ - Footprint:
Package_DFN_QFN:DHVQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x3mm - 3D model: DHVQFN-20(2.5x4.5), generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.9 mm nominal VQFN height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files:
74ahc573bq-etched.step/74ahc573bq-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74ahc573bq.step/74ahc573bq.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Nexperia datasheet (17 pp, sha256
70a39eb3d8b5f2b1, retrieved 2026-10-19, 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).