component
74FCT621ATSOG
Public Made by Adomby adom
RENESAS Buffers / Drivers, SOIC-20-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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PCB Footprint
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Datasheet
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README
markdown74FCT621ATSOG
RENESAS · Buffers / Drivers · SOIC-20-300mil
74FCT621ATSOG from RENESAS, 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 | GAB | input | Enable input that, with GBA, sets direction; per the function table GAB high passes A data to the B bus. |
| 2 | A1 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 3 | A2 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 4 | A3 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 5 | A4 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 6 | A5 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 7 | A6 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 8 | A7 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 9 | A8 | bidirectional | A-bus input or open-drain output, sinks up to 48mA (VOL 0.5V max). |
| 10 | GND | power_in | Ground reference (0V). |
| 11 | B8 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 12 | B7 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 13 | B6 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 14 | B5 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 15 | B4 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 16 | B3 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 17 | B2 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 18 | B1 | bidirectional | B-bus input or open-drain output, sinks up to 64mA (VOL 0.55V max). |
| 19 | GBA | input | Enable input that, with GAB, sets direction; per the function table GBA low passes B data to the A bus. |
| 20 | VCC | power_in | Positive supply, 5.0V ±5% over the industrial range (-40°C to +85°C). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | RENESAS |
| 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 |
|---|---|---|---|---|---|---|---|
| Terminal voltage with respect to GND (inputs and VCC terminals) | VTERM(2) | -0.5 | 7 | V | Inputs and VCC terminals only | 2 | |
| Terminal voltage with respect to GND (output and I/O terminals) | VTERM(3) | -0.5 | V | Output and I/O terminals only; printed max is VCC+0.5 (not numeric) | 2 | ||
| Storage temperature | TSTG | -65 | 150 | °C | 2 | ||
| DC output current | IOUT | -60 | 120 | mA | 2 | ||
| Input capacitance | CIN | 6 | 10 | pF | VIN = 0V; TA = +25°C, F = 1.0MHz | 2 | |
| Output capacitance | COUT | 8 | 12 | pF | VOUT = 0V; TA = +25°C, F = 1.0MHz | 2 | |
| Input HIGH level | VIH | 2 | V | Guaranteed logic HIGH level; Industrial TA = -40°C to +85°C, VCC = 5.0V ±5% | 3 | ||
| Input LOW level | VIL | 0.8 | V | Guaranteed logic LOW level; Industrial TA = -40°C to +85°C, VCC = 5.0V ±5% | 3 | ||
| Input HIGH current | IIH | -1 | 1 | µA | VCC = Max., VI = 2.7V | 3 | |
| Input LOW current | IIL | -1 | 1 | µA | VCC = Max., VI = 0.5V | 3 | |
| Input current | II | -1 | 1 | µA | VCC = Max., VI = VCC (Max.) | 3 | |
| Clamp diode voltage | VIK | -0.7 | -1.2 | V | VCC = Min., IIN = -18mA | 3 | |
| Output HIGH current | IOH | 20 | µA | VCC = Max., VOH = VCC (Max.), VIN = VIH or VIL | 3 | ||
| Output LOW voltage (B bus) | VOL | 0.3 | 0.55 | V | VCC = Min., IOL = 64mA, VIN = VIH or VIL | 3 | |
| Output LOW voltage (A bus) | VOL | 0.3 | 0.5 | V | VCC = Min., IOL = 48mA, VIN = VIH or VIL | 3 | |
| Input/output power off leakage | IOFF | -1 | 1 | µA | VCC = 0V, VIN or VO = 4.5V | 3 | |
| Input hysteresis | VH | 200 | mV | 3 | |||
| Quiescent power supply current | ICC | 0.01 | 1 | mA | VCC = Max., VIN = GND or VCC | 3 | |
| Quiescent power supply current, TTL inputs HIGH | ΔICC | 0.5 | 2 | mA | VCC = Max., VIN = 3.4V (per TTL input) | 4 | |
| Dynamic power supply current | ICCD | 0.15 | 0.25 | mA/MHz | VCC = Max., VIN = VCC, VIN = GND, outputs open, GBA = GAB = GND or VCC, one input toggling, 50% duty cycle | 4 | |
| Total power supply current | IC | 1.5 | 3.5 | mA | VCC = Max., VIN = VCC, VIN = GND, outputs open, GBA = GAB = GND or VCC, one bit toggling | 4 | |
| Total power supply current | IC | 1.8 | 4.5 | mA | VCC = Max., VIN = 3.4V, VIN = GND, outputs open, one bit toggling at fi = 10MHz, 50% duty cycle | 4 | |
| Total power supply current | IC | 36 | mA | VCC = Max., VIN = VCC, VIN = GND, outputs open, GBA = GAB = GND or VCC, eight bits toggling at fi = 2.5MHz, 50% duty cycle; example of ICC formula, not tested | 4 | ||
| Total power supply current | IC | 5 | 14 | mA | VCC = Max., VIN = 3.4V, VIN = GND, outputs open, GBA = GAB = GND or VCC, eight bits toggling at fi = 2.5MHz, 50% duty cycle; example of ICC formula, not tested | 4 | |
| Propagation delay A to B (tPLH) | tPLH | 5.5 | 12 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay A to B (tPHL) | tPHL | 1.5 | 6.8 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay B to A (tPLH) | tPLH | 5.5 | 12 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay B to A (tPHL) | tPHL | 1.5 | 6.4 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay GBA to A (tPLH) | tPLH | 5.5 | 13 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay GBA to A (tPHL) | tPHL | 1.5 | 6.8 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay GAB to B (tPLH) | tPLH | 5.5 | 13 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Propagation delay GAB to B (tPHL) | tPHL | 1.5 | 6.4 | ns | AT grade; CL = 50pF, RL = 500Ω; min guaranteed not tested | 4 | |
| Ambient operating temperature (Industrial) | TA | -40 | 85 | °C | Industrial range | 3 | |
| Supply voltage tolerance | VCC | -5 | 5 | % | VCC = 5.0V ±5% | 3 |
CAD (KiCad official)
- Symbol:
74FCT621ATSOG - Footprint:
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm - 3D model: SOIC-20-300mil (KiCad packages3D, STEP)
- 3D model files:
74fct621atsog-etched.step/74fct621atsog-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);74fct621atsog.step/74fct621atsog.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: RENESAS datasheet (7 pp, sha256
6291c1f12127c7e6, retrieved 2026-10-28, 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).