SMD code LRs
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.
The last letter, s, is lower case, which on NXP and Philips parts is a date or factory code, so it was set aside and LR was searched.
127 parts are printed LRs
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.
AX6603-260Z6DFNLDO regulator, AXElite TechnologyLDO regulatorDFNNot recordedAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- DFN
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 2.6V±2%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AX6603-440BSOT-23-5LDO regulator, 5 pins, AXElite TechnologyLDO regulatorSOT-23-55 pinsAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- SOT-23-5
- Pins
- 5
- Details
- Linear voltage regulator IC: LDO, 4.4V±3%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AX6603-440Z6DFNLDO regulator, AXElite TechnologyLDO regulatorDFNNot recordedAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- DFN
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 4.4V±3%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AX6604RCASOT-23-6LDO regulator, 6 pins, AXElite TechnologyLDO regulatorSOT-23-66 pinsAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out., Vo1/Vo2=3.3V/1.8V±2%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AX6605MCASOT-23-6LDO regulator, 6 pins, AXElite TechnologyLDO regulatorSOT-23-66 pinsAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual out., Vo1/Vo2=3.3V/3.3V±2%, 200mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
BBGA2817SOT-3636 pins, NXPNot recordedSOT-3636 pinsNXP
- What it is
- Not recorded
- Maker
- NXP
- Package
- SOT-363
- Pins
- 6
- Details
- MMIC amp 3.3V 22mA 0-2.2GHz
- Source
- Published code list
Is it dead? The meter test is below: RF amplifier.
BD52E23GSOT-23-5Voltage supervisor, 5 pins, ROHMVoltage supervisorSOT-23-55 pinsROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- SOT-23-5
- Pins
- 5
- Details
- Voltage Detector
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
BL8566-RCR6SOT-23-6LDO regulator, 6 pins, Analog IntegrationsLDO regulatorSOT-23-66 pinsAnalog Integrations
- What it is
- LDO regulator
- Maker
- Analog Integrations
- Package
- SOT-23-6
- Pins
- 6
- Details
- Linear voltage regulator IC: LDO, Dual output, Vout1/Vout2=3.0V/3.0V±2%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
BSR177SOT-233 pins, PhilipsNot recordedSOT-233 pinsPhilips
- What it is
- Not recorded
- Maker
- Philips
- Package
- SOT-23
- Pins
- 3
- Details
- equivalent BSJ177
- Source
- Published code list
Is it dead? The meter test is below: This part.
CAT809LSDI-GT3SOT-323Voltage supervisor, 3 pins, onsemiVoltage supervisorSOT-3233 pinsonsemi
- What it is
- Voltage supervisor
- Maker
- onsemi
- Package
- SOT-323
- Pins
- 3
- Details
- Voltage detector IC: 4.63V±1.5%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
CAT809LTBI-GT3SOT-23Voltage supervisor, 3 pins, onsemiVoltage supervisorSOT-233 pinsonsemi
- What it is
- Voltage supervisor
- Maker
- onsemi
- Package
- SOT-23
- Pins
- 3
- Details
- Voltage detector IC: 4.62V±1.5%, -Reset PPO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
CD214B-T17ASMBTVS diode, 2 pins, BournsTVS diodeSMB2 pinsBourns
- What it is
- TVS diode
- Maker
- Bourns
- Package
- SMB
- Pins
- 2
- Details
- TVS: 17V, 21.7A, 600W(1ms)
- Source
- Published code list
Is it dead? The meter test is below: TVS or ESD protection diode.
3 more parts have no package on record
AX6603-440BTLDO regulator, AXElite TechnologyLDO regulatorNot recordedNot recordedAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 4.4V±3%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
AX6603-440SCLDO regulator, AXElite TechnologyLDO regulatorNot recordedNot recordedAXElite Technology
- What it is
- LDO regulator
- Maker
- AXElite Technology
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Linear voltage regulator IC: LDO, 4.4V±3%, 300mA, +CE
- Source
- Published code list
Is it dead? The meter test is below: Voltage regulator.
BD52E23G-MVoltage supervisor, ROHMVoltage supervisorNot recordedNot recordedROHM
- What it is
- Voltage supervisor
- Maker
- ROHM
- Package
- Not recorded
- Pins
- Not recorded
- Details
- Voltage detector IC: 2.3V±1%, -Reset ODO
- Source
- Published code list
Is it dead? The meter test is below: Integrated circuit.
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.
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.
RF amplifier
Voltage, board powered, on the output pin that the bias resistor or choke feeds.
Working, it reads
The output pin sits at the device voltage the datasheet gives, a few volts, below the supply.
Dead, it reads
- Output pin at 0 V, or near 0 Ω to ground with the power off: shorted inside.
- Output pin at the full supply voltage: open inside, no current flowing.
- On the board:
- Measured on the board with power on; the bias network is part of the reading.
- Compare:
- If an identical part sits elsewhere on the board, measure it the same way: that is what this one should read.
- Watch for:
- The figures depend on the part and its bias resistor. The datasheet gives both.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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.
This part
Diode range and ohms range, part lifted.
Working, it reads
Depends on what it is. The datasheet, or an identical part, says.
Dead, it reads
- Between two pins, the same reading both ways, near 0 V with a continuous beep: shorted.
- Open between every pair of pins: failed open, or a part that reads open when working.
- 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.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
TVS or ESD protection diode
Diode range, from the protected line to ground, part lifted if you can.
Working, it reads
A one-way part reads about 0.6 to 0.8 V forward and open in reverse. A two-way part reads open both ways. Arrays with several lines read as the datasheet's diagram draws them.
Dead, it reads
- From the line to ground, the same reading both ways, near 0 V with a continuous beep: shorted.
- A reading both ways on a one-way part: leaky.
- A one-way part open both ways: failed open.
- On the board
- , a line reading shorted to ground can be this part or anything else on that line. Lift it: if the short goes with it, it has failed.
- Compare:
- The same part on the next line or connector pin is the healthy reading to compare with.
- Watch for:
- A two-way part reads open both ways when it is good, exactly like one that has failed open. The meter cannot tell them apart; an identical part on the next line can.
A dead part still carries its marking. A short or an open says it has failed, not that it is a different part.
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