Remote-control receivers
Receiving terminals for ASK wireless remote-control products.
LR690L 300–440 MHz ASK Wireless Receiver IC
1,000–4,000 · MOQ 1,000US$0.23per IC
4,001–12,000US$0.21per IC
12,001+ · Volume orderRequest quoteFor production quantities
Typical applications
For compact ASK remote-control receivers.
LR690L provides the RF reception and demodulated pulse output for a downstream decoder IC or MCU.
Smart-home controls
Receiver control boards for smart-home equipment.
Doorbells & switches
Wireless doorbells, switches and other low-rate controls.
Security alarms
ASK/OOK receiving equipment for alarm-trigger applications.
System position
RF reception first. Decoding comes next.
ANT receives the matched RF signal; DATA outputs demodulated baseband pulses for the downstream logic.
Antenna & matchingTarget-band RF input300–440 MHz
→LR690L
ASK reception
ASK reception
Decoder IC or MCUAddress, key and control logicDATA pulses
Application boundary: DATA is a demodulated baseband pulse signal. It is not UART data and does not contain a predecoded address or key value.
Frequency range300–440 MHz
ReceiverASK
Sensitivity−110 dBm typical
Operating voltage2.0–5.5 V
Current · 315 MHz2.8 mA typical
Current · 433.92 MHz2.9 mA typical
Sleep current0.3 µA typical
PackageSOT23-6
Application boundaries
Validate the complete receiver path.
Receiver performance depends on the target frequency, crystal/reference network, RF matching, antenna, supply, PCB layout and final enclosure.
Good starting fit
✓ ASK remote-control receiving applications.
✓ A downstream decoder IC or MCU reads DATA pulses.
✓ The target band uses a matched antenna and RF network.
✓ SHUT control is available for low-power operation.
Check carefully
! Do not treat DATA as UART or decoded key data.
! Match the crystal/reference circuit to the target frequency.
! Keep ANT, crystal and matching traces short and away from noise.
! Verify reception in the final enclosure and installation.
Technical specifications
Confirmed selection data for LR690L.
The released LR690L Datasheet V1.6 remains the authority for final circuit, matching and PCB decisions.
Product typeASK wireless receiver IC
Frequency range300–440 MHz
Receiver sensitivity−110 dBm · typical condition
Operating voltage2.0–5.5 V
Operating current2.8 mA at 315 MHz · typical
Operating current2.9 mA at 433.92 MHz · typical
Sleep current0.3 µA · SHUT high or floating
Data outputDemodulated digital pulses on DATA
Active controlSHUT low
Sleep controlSHUT high or floating
PackageSOT23-6 surface mount
Local decoupling100 nF close to VDD recommended
Pin assignment
Six IC connections
- XTAL
- External crystal or reference-frequency-related connection.
- GND
- System ground.
- SHUT
- Low for active operation; high or floating for sleep.
- DATA
- Demodulated digital pulse output.
- VDD
- Positive supply; 2.0–5.5 V.
- ANT
- RF input for the antenna or matching network.
Operating modes
Two defined states
- Active modeDrive SHUT low; DATA outputs demodulated ASK data.
- Sleep modeDrive SHUT high or leave it floating; no valid received data is output.
Confirm VDD, GND, SHUT and DATA levels before connecting the antenna and downstream decoder.
Technical downloads
File for evaluation and design-in.
Use the released datasheet for reference circuits, pin details, layout and antenna guidance.
LR690L Datasheet V1.6
Product overview, technical specifications, pin assignment, operating modes, reference circuits, decoding guidance and PCB recommendations.
Does LR690L decode remote-control addresses or key values?
No. DATA provides demodulated baseband pulses. Add a decoder IC or MCU for address learning, key decoding, switch output or serial output.
Is DATA a UART interface?
No. DATA is a pulse output and must not be treated as UART data.
How is sleep mode controlled?
Drive SHUT high or leave it floating for sleep. Drive SHUT low for active reception.
Can one RF network cover every frequency from 300 to 440 MHz?
The IC covers that range, but the crystal/reference circuit, matching network and antenna must be selected and verified for the target frequency.
Purchase options
Order ICs or start with a development kit.
Receiver IC
LR690L
SKU: LR690L_BD · Stock: 3,343,485
US$0.231,000–4,000 · per IC
US$0.214,001–12,000 · applied in cart
Online purchase quantity: 1,000–12,000 ICs. Request a quote for 12,001 or more.
Development kit
Start testing faster
US$69 / set
- 10 LR690L ICs
- 5 Yuan-R1L receiver modules
- 4 Ling-T3A transmitter modules
- 4 Ling-R1 decoder modules
- 1 development assistant
- 5 TT02 + 5 TT04 antennas
- Free shipping
SKU: SET-LR690L · Stock: 200 sets
Volume order
12,001 ICs or more?
Send the target quantity, delivery location and schedule for a quotation.
Request bulk quote →