| Operating Temperature | -40°C ~ 85°C | |
| Current - Transmitting | 33.5mA | |
| Serial Interfaces | I2C, SPI, UART, USB | |
| Mounting Type | Surface Mount | |
| Product Status | Obsolete | |
| RF Family/Standard | 802.15.4, Bluetooth, WiFi | |
| GPIO | 24 | |
| Power - Output | 8dBm | |
| Supplier Device Package | 48-QFN (7x7) | |
| Series | EM358x | |
| Type | TxRx Only | |
| Sensitivity | -100dBm | |
| Memory Size | 256kB Flash, 32kB RAM | |
| Package / Case | 48-VFQFN Exposed Pad | |
| Current - Receiving | 28mA | |
| Modulation | O-QPSK | |
| Voltage - Supply | 1.18V ~ 1.32V, 1.7V ~ 1.9V | |
| Mfr | Silicon Labs | |
| Data Rate (Max) | 5Mbps | |
| Frequency | 2.4GHz ~ 2.5GHz | |
| Package | Bulk | |
| Protocol | 802.11g, Zigbee® | |
| Base Product Number | EM3581 | 
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Shipments are made once a day around 5pm, excluding Sundays.
Once shipped, the estimated delivery time is usually 5-7 business days, depending on the courier you choose.
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