SMD code L4-
Marking codes are not standardised, and the same code is reused by unrelated makers for unrelated parts. Below is every part in our tables printed with it, and any printed with a code that is easy to misread as it, from the manufacturers' own marking tables and published code lists.
154 parts are printed L4-
Not sure which one you have?
Answer up to 4 quick questions and these 50 parts are ranked, with a meter test that settles it. It works on a dead part too.
NL17SZ32DFT2G-QSOT-23-5Logic gate, 5 pins, onsemiLogic gateSOT-23-55 pinsonsemi
- What it is
- Logic gate
- Maker
- onsemi
- Package
- SOT-23-5
- Pins
- 5
- Details
- Single 2-Input OR Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
NL17SZ32EDFSOT-23-5Logic gate, 5 pins, onsemiLogic gateSOT-23-55 pinsonsemi
- What it is
- Logic gate
- Maker
- onsemi
- Package
- SOT-23-5
- Pins
- 5
- Details
- Single 2-Input OR Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
NL17SZ32XV5SOT-553Logic gate, 5 pins, onsemiLogic gateSOT-5535 pinsonsemi
- What it is
- Logic gate
- Maker
- onsemi
- Package
- SOT-553
- Pins
- 5
- Details
- Single 2-Input OR Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
NL27WZ32USGUS8Logic gate, 8 pins, onsemiLogic gateUS88 pinsonsemi
- What it is
- Logic gate
- Maker
- onsemi
- Package
- US8
- Pins
- 8
- Details
- Dual 2 Input OR Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
NL27WZ32USG-QUS8Logic gate, 8 pins, onsemiLogic gateUS88 pinsonsemi
- What it is
- Logic gate
- Maker
- onsemi
- Package
- US8
- Pins
- 8
- Details
- Dual 2 Input OR Gate
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
SL14-MSOD-123Schottky diode, 2 pins, Formosa MicrosemiSchottky diodeSOD-1232 pinsFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- SOD-123
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SL14-M-Q1SOD-123Schottky diode, 2 pins, Formosa MicrosemiSchottky diodeSOD-1232 pinsFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- SOD-123
- Pins
- 2
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SN74LVC1G07DPWX2SONLogic gate, 5 pins, Texas InstrumentsLogic gateX2SON5 pinsTexas Instruments
- What it is
- Logic gate
- Maker
- Texas Instruments
- Package
- X2SON
- Pins
- 5
- Details
- Single Buffer/Driver With Open-Drain Output
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Integrated circuit.
7 more parts have no package on record
SGM2045-4.20XGLDO regulator, 4 pins, SG MicroLDO regulatorNot recorded4 pinsSG Micro
- What it is
- LDO regulator
- Maker
- SG Micro
- Package
- Not recorded
- Pins
- 4
- Details
- 4.20 V output, 300mA, Low VIN, Ultra-Low Noise and High PSRR Linear Regulator
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Voltage regulator.
SL14-MHSchottky diode, Formosa MicrosemiSchottky diodeNot recordedNot recordedFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SL14-MHTSchottky diode, Formosa MicrosemiSchottky diodeNot recordedNot recordedFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SL14-MSSchottky diode, Formosa MicrosemiSchottky diodeNot recordedNot recordedFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SL14-MS-Q1Schottky diode, Formosa MicrosemiSchottky diodeNot recordedNot recordedFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SL14-MSTSchottky diode, Formosa MicrosemiSchottky diodeNot recordedNot recordedFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
SL14-MST-Q1Schottky diode, Formosa MicrosemiSchottky diodeNot recordedNot recordedFormosa Microsemi
- What it is
- Schottky diode
- Maker
- Formosa Microsemi
- Package
- Not recorded
- Pins
- Not recorded
- Source
- Manufacturer datasheet
Is it dead? The meter test is below: Schottky diode.
Is it dead? One meter test per kind
Parts of the same kind are tested the same way, so each test is here once. Each part above points to its own.
Integrated circuit
Voltage with the board powered; ohms from each pin to ground with it off.
Working, it reads
Supply pin at its voltage and the output doing what the datasheet says. Readings between pins depend on the part.
Dead, it reads
- A pin near 0 Ω to ground or to the supply pin where an identical part does not read that: failed short.
- Supply present, output stuck: failed, or its load has.
- On the board:
- A pin shorted to ground on the board can be anything on that net. Lift the pin to be sure.
- Compare:
- The surest reference is the same IC on a working board, measured pin by pin.
- Watch for:
- Its protection diodes can read like junctions between pins, even like a transistor. That proves nothing either way.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Voltage regulator
Voltage, board powered, black probe on ground. Then ohms with the power off.
Working, it reads
Input pin at the supply, output pin at its rated voltage, and the enable pin high if it has one.
Dead, it reads
- Output equal to the input: the pass element has shorted. Everything after it may have taken the full input.
- Input present, enable high, no output: failed open, or holding itself off into a shorted load. Power off and measure output to ground.
- Power off, input to output near 0 Ω: shorted.
- On the board:
- An output at 0 V is often a shorted load with the regulator in current limit. Lift the output pin: if the short stays on the board, the regulator may be fine.
- Compare:
- The same regulator on another rail or another board shows the right voltages and the right resistances.
- Watch for:
- Makers put input, output and ground on different pins in the same package, so take them from this part's datasheet. Diode or ohms readings between its pins say little; check it powered.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Schottky diode
Diode range, part lifted or one leg off the pad. Red probe on the anode.
Working, it reads
About 0.15 to 0.45 V anode to cathode, roughly half a silicon diode, and open the other way.
Dead, it reads
- The same reading both ways round, near 0 V with a continuous beep or the same middling value: shorted.
- A reading the wrong way round as well: leaky.
- Open both ways: failed open.
- On the board
- this is a first look only: the meter reads every path between those pins, and a short can be a neighbour. Lift one leg before you condemn it.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- A large Schottky can read about 0.1 V forward and beep like a short, and leaks a little the wrong way when good, more when warm. It is shorted only if it reads the same both ways. Measure it cold, beside an identical cold one.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
Did you find your part?
Open this in the search to correct a character or try another package.