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QFN-40
QFN-40
The QFN-40 (Quad Flat No-lead) is a surface-mount package designed for high-density circuits. Featuring leadless design, exposed thermal pad, and low profile, it delivers superior heat dissipation and compact size. Typical dimensions are 5×5 mm with a 0.5 mm pin pitch, making it ideal for power management ICs, RF modules, and microcontrollers in portable devices. Its bottom-terminal contacts enable direct PCB thermal transfer, while RoHS-compliant materials ensure reliability in industrial environments.
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32KB 8KB FLASH 2.2V~5.5V CM0 96MHz QFN-40 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 6904
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32KB 2.5KB FLASH 2.45V~5.5V 51Series 73.728MHz QFN-40 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 2849
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32KB 2.5KB FLASH 2.2V~5.5V CM0 96MHz QFN-40 Microcontroller Units (MCUs/MPUs/SOCs) ROHS
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5236
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USB change UART QFN-40 USB ICs ROHS
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5479
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Designed for Applications Requiring up to 8.5 A
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 8435
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Audio D/A Converter ICs Sabre 32 Stereo Combo DAC/HPA/Switch
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5804
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Audio D/A Converter ICs Sabre 32 1V rms Integrated Stereo DAC/HPA/Switch
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5419
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Audio D/A Converter ICs Sabre 32 8 Channel DAC with PLL and line drivers
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 9111
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BLUE GECKO, QFN40, SECURE BOOT W
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 6849
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BLUE GECKO, QFN40, SECURE BOOT W
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5676
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BLUE GECKO, QFN40, SECURE BOOT W
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5723
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IC RF TXRX+MCU BLUETOOTH 40VFQFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 6187
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IC MCD CCG5C WIRED 40-QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 9766
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IC MCD CCG5C WIRED 40-QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 7494
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Integrierte Schaltungen (ICs)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 7500
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2.1CH (10W x 2 + 30W @24V, 6Ω)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 10
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Integrierte Schaltungen (ICs)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 830
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Integrierte Schaltungen (ICs)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5
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Integrierte Schaltungen (ICs)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 50
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CX11802-33Z Laptop motherboard ic with good condition.
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 4980
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ISL78365ARZ (High Speed Quadruple Laser Diode Driver), 6X6 W
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 4444
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6 phase green digital hybrid controller with PMBUS; 40ld 5x5 HT SUSA CODE:8542390000
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 1170
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6 phase green digital hybrid controller with PMBUS; 40ld 5x5 HT SUSA CODE:8542390000
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 1251
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Pb-Free w/Anneal ISL6306 4-phase VR11 Controller Commercial HT SUSA CODE:8542390000
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 1597
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12x16 Dot Matrix LED Driver, QFN-40 (5.0mm x 5.0mm)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 2825
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CYNOSURE II GNSS CHIP
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 5818
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Triple Video Digital to Analog Converter
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 687
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Triple Video Digital to Analog Converter
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 753
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Triple Video Digital to Analog Converter
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 911
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Triple Video Digital to Analog Converter
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 711
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Triple Video Digital to Analog Converter
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 1403
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Triple Video Digital to Analog Converter
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 1215
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MCU, RF Transceiver, AX8052, 20 MHz, 8 bit, 8.25 KB RAM/64 KB Program, SPI, UART, QFN-40
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 186
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SmartConnect Chipset (WILC1000) - 802.11/b/g/n,Indus, -20Cto85C, 40-QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 4940
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Regulator Buck
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1 + 10 + 25 + 50 + >=100 -
1
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Driver 80A 1-OUT High Side/Low Side Inv/Non-Inv 40-Pin QFN EP T/R
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 2987
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Pb-FREE Dual 5V FIX Multiprotocol Transc., 40 6 X6 QFN, -40C
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 250
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8Bit Microcontrollers - MCU 64KB/8KB RAM DC-DC buck LCD AES QFN40
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 760
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8Bit Microcontrollers - MCU 64KB/8KB RAM DC-DC buck LCD AES QFN40
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 202
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MCU 8Bit C8051F96x 8051 CISC 128KB Flash 2.5V/3.3V 40Pin QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 623
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MCU 8Bit C8051F96x 8051 CISC 16KB Flash 2.5V/3.3V 40Pin QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 884
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IC MCU 32Bit 32KB FLASH 40QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 864
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MCU 8Bit C8051F96x 8051 CISC 128KB Flash 2.5V/3.3V 40Pin QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 333
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MCU 8Bit C8051F96x 8051 CISC 64KB Flash 2.5V/3.3V 40Pin QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 32
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RF Transceiver ICs
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 435
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Wireless Analog AV Transmission
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1 + 10 + 25 + 50 + >=100 -
1
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IC ATV/DTV TUNER HYBRID 40-QFN
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 2204
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Integrierte Schaltungen (ICs)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 1984
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Integrierte Schaltungen (ICs)
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 16528
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Switching Controllers 4-PH PWM CNTRLR W/O DE W/O IDROOP IND
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1 + 10 + 25 + 50 + >=100 -
Mindestbestellmenge : 1 Lagerbestand : 4000
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Q:What defines the physical structure of QFN-40?
A:Key features include:
- Leadless bottom-mounted pads for compact PCB attachment.
- Central thermal pad (80% coverage) for enhanced heat dissipation.
- 40-pin layout with peripheral array for optimized signal routing.
- 0.9 mm ultra-thin profile for space-constrained designs. -
Q:Why choose QFN-40 over alternatives?
A:Critical advantages:
- Miniaturization: 50% smaller than SOIC-40 with equivalent pin count.
- Thermal Performance: Direct PCB heat path via exposed thermal pad.
- Electrical Benefits: Low-inductance design (<0.5 nH) for high-frequency stability.
- Reliability: Moisture-resistant substrate (MSL3 rating). -
Q:What are common technical specs?
A:Standard configurations (consult datasheets):
- Body Size: 6×6 mm
- Height: 0.9 mm
- Pin Pitch: 0.5 mm
- Material: Copper-alloy leads with Ni/Pd/Au plating.
- Temp Range: -40°C to +125°C (industrial grade). -
Q:Where is QFN-40 typically applied?
A:Dominant use cases:
- Power Converters: e.g., Buck/boost ICs (e.g., TPS62130).
- RF Modules: e.g., Bluetooth/Wi-Fi transceivers (e.g., CC2640).
- Sensor Interfaces: e.g., MEMS accelerometers (e.g., LIS3DH). -
Q:What are critical assembly guidelines?
A:Key recommendations:
- PCB Design: Thermal vias (4×4 array) under central pad.
- Solder Paste: Type 4 solder (particle size 20–38 μm).
- Reflow Profile: Peak temp ≤ 245°C (Pb-free process).
- Inspection: X-ray (AXI) mandatory for pad void detection.