The L101S471LF datasheet consolidates the essential parameters designers need when choosing a 10‑pin resistor network: nine 470 Ω resistors, ±2% tolerance, ~100 ppm/°C temperature coefficient, bussed configuration, and ~0.125 W power per resistor. These numbers directly affect noise, bias currents, thermal derating and placement decisions on compact PCBs, so a single-reference datasheet speeds accurate design and review.
This article covers electrical specs, mechanical dimensions, a clear pinout, example wiring patterns, PCB/layout and test tips aimed at hardware engineers and PCB designers. It presents quick calculations and checklist items so readers can convert the L101S471LF data into safe operating margins and practical layouts within a concise technical summary.
These entries typically appear in the datasheet overview, electrical characteristics table and mechanical drawing; confirming each location avoids selection errors during BOM review.
The L101S471LF is commonly used for grouped pull‑ups or pull‑downs on MCU port banks, simple signal termination, and sensor interface bias networks. Long‑tail search targets include phrases like “resistor network for MCU pull‑ups” and “resistor array 10‑pin SIP for I/O bias,” reflecting its typical role in embedded systems and compact analog grouping.
Nominal resistance is 470 Ω; ±2% tolerance means actual value = 470 Ω ±9.4 Ω. With 100 ppm/°C, the drift from −40 to +85 °C (a 125 °C span) is 470 Ω × 100×10⁻⁶ ×125 ≈ 5.9 Ω, so worst‑case over temperature adds roughly 1.25% to the base tolerance. Use this to size precision circuits and set comparator thresholds.
Each resistor is rated at ~0.125 W. For a single resistor, allowable continuous current I = sqrt(P/R) = sqrt(0.125/470) ≈ 0.0163 A (16.3 mA). On a populated PCB, derate for elevated ambient and reduced airflow—apply linear derating from rated temp to maximum operating temp per datasheet derating curve and avoid running resistors near their max power in parallel configurations unless thermal modelling confirms safe junction rise.
Key mechanical parameters to note: 10‑pin SIP body length, pin pitch (typically 2.54 mm), body height and lead length. Recommended PCB footprint items include 2.54 mm pitch holes, 0.8–1.0 mm plated through‑hole drill, and annular rings sized per board house rules. Check the datasheet drawing for exact tolerances before final artwork.
Pin mapping: a 10‑pin SIP with one common (bussed) pin and nine individual resistor end pins. Textual mapping example: Pin 1 = resistor1 end A, Pins 2–10 = resistor ends B and the common (depending on manufacturer orientation). Use the label “common” for the bus pin and verify orientation notch when converting to a silk‑screened diagram.
Datasheet tables show typical vs maximum columns—typical values are representative, maximum are guaranteed limits. Confirm test conditions (ambient temperature, measurement circuit) printed in the table footnotes. Treat limits as the guaranteed safe spec; use typicals only for approximate modelling and margining.
Variants differ by resistance value, tolerance code, or temperature coefficient suffixes. When seeking drop‑in substitutes, match package, pinout polarity (bussed vs isolated), R value, tolerance and power rating. Always confirm revision level and ordering code suffixes in the official datasheet before placing an order.
For bussed pull‑ups tie the common pin to VCC and each resistor end to individual I/O lines; this creates uniform pull‑up resistance across lines. For isolated networks, each resistor is independent—useful for voltage dividers or matched termination. Text schematic: COMMON → VCC; R1 ←→ IO1, R2 ←→ IO2, etc.
Pull‑up example: with 470 Ω to VCC (3.3 V), steady current per line = 3.3/470 ≈ 7.0 mA; ensure total bus current and power stay below derated limits. For a divider, pair 470 Ω with another resistor; check loading effects on signal integrity and place the array close to the MCU pins for best performance.
Checklist: verify footprint and drill sizes, include thermal relief for through‑holes, allow spacing for heat dissipation, orient part number/marking toward test probes, and use standard lead‑free solder profiles. Consider conformal coating only after thermal verification; coatings can trap heat and affect dissipation.
Testing steps: measure each resistor in‑circuit with power removed; look for expected resistance ±2% and common continuity on bus pin. Under power, verify voltages and use thermal imaging or touch testing for hot spots. Common failures include solder cracks, incorrect pin wiring and localized overheating from excessive bus current.
Key takeaways: the L101S471LF datasheet defines nine 470 Ω resistors in a 10‑pin SIP bussed package with ±2% tolerance, 100 ppm/°C tempco and ~0.125 W per resistor—data critical for biasing and termination. Consult the full L101S471LF datasheet for exact mechanical drawings and absolute maximum ratings before layout and procurement.
The L101S471LF lists nine 470 Ω resistors with a ±2% tolerance. Designers should calculate absolute tolerance: 470 Ω ±9.4 Ω, and include temperature drift from the 100 ppm/°C spec when budgeting precision across expected operating temperatures.
The 10‑pin SIP has a single common (bussed) pin and nine individual resistor ends. Orientation markers on the package define Pin 1; map Pin 1 through Pin 10 according to the datasheet drawing to place the common on the correct net when converting text mapping to a PCB silk diagram.
With power off, measure each resistor to confirm value within ±2% and check common continuity on the bus pin. Power the board and measure voltages under load, inspect for hot resistors, and reflow suspect joints. Thermal imaging helps identify overloaded elements or poor solder joints quickly.