CC2541RHA Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
Texas Instruments CC2541RHA is a single-chip Bluetooth Low Energy and proprietary 2.4 GHz wireless MCU in a QFN package, integrating an 8051 core with up to 256 KB Flash for IoT and wearable applications. Low-power radio with -93 dBm RX sensitivity. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 41
- Lifecycle
- ACTIVE
- Datasheet
- CC2541RHA Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Integrated Bluetooth Low Energy (BLE) and proprietary 2.4 GHz radio with -93 dBm RX sensitivity enables robust wireless links for wearables and IoT sensors at low transmit power
- On-chip 8051 MCU core with up to 256 KB Flash and 8 KB RAM allows full BLE stack and application code to run on a single chip, eliminating an external host processor
- Ultra-low active RX current of approximately 17.9 mA and standby current under 1 µA extends battery life in coin-cell-powered health and fitness devices
Applications
The CC2541RHA targets Bluetooth Low Energy wearables such as heart-rate monitors, fitness bands, and glucose meters where the integrated 8051 MCU runs both the BLE stack and application firmware on a single 2.4 GHz chip. Smart home accessories including HID devices, remote controls, and proximity tags benefit from its low standby current below 1 µA for coin-cell battery operation. Industrial wireless sensor nodes use its proprietary 2.4 GHz mode for reliable point-to-point links in environments where BLE is unnecessary.
Specifications
| YTEOL | EYTEOL |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Country of Origin | Country of Origin |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CC2541RHA:
Frequently Asked Questions
What wireless protocol does the CC2541RHA support, and what RX sensitivity does it achieve?
The CC2541RHA supports Bluetooth Low Energy (BLE 4.0) and TI's proprietary 2.4 GHz protocol. It achieves an RX sensitivity of -93 dBm in BLE mode, enabling reliable links at distances exceeding 30 meters in open-air environments with a 0 dBm transmit power, without requiring an external LNA.
How much Flash and RAM does the CC2541RHA include, and can it run a full BLE stack plus application on-chip?
The CC2541RHA integrates up to 256 KB of Flash program memory and 8 KB of RAM. This is sufficient to hold TI's BLE stack (approximately 70 KB) and a custom application layer with sensor data buffering, GATT profile handling, and low-power state machine in the on-chip 8051 core, removing the need for an external host MCU.
What is the standby current of the CC2541RHA, and how does that translate to battery life in a coin-cell wearable?
The CC2541RHA achieves a standby current below 1 µA in sleep mode. For a wearable powered by a CR2032 coin cell (225 mAh), a device advertising at 1-second intervals with 50 ms active time can achieve a battery life exceeding 1 year at an average current of approximately 15 µA, depending on the advertising interval and payload size.
Which package does the CC2541RHA use, and what are its PCB layout considerations for 2.4 GHz RF performance?
The CC2541RHA is housed in a QFN package. For optimal 2.4 GHz RF performance, the PCB layout should include a ground-plane keepout under the antenna feed, 50 Ω trace impedance matched to a balun or external antenna, and bypass capacitors of 100 nF and 10 µF placed within 2 mm of the VDD supply pins to suppress switching noise.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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