ALT1255 IoT Chip Ultra Low Power Single-Mode NB2 NB-IoT Modem 5G-Ready with iSIM

The ALT1255 single-mode NB2 (NB-IoT) modem features optimized cost, ultra-low power consumption, and a small form factor designed for seamless integration across various verticals including smart meters, logistics, telematics, wearables, utilities, and smart city solutions.

As the most integrated, cost-optimized NB-IoT modem with 2G fallback available in the market, this 5G-ready modem incorporates an integrated SIM (iSIM), advanced MCU, and rich application layer, all backed by a reliable GSM/GPRS fallback modem. The built-in iSIM eliminates barriers related to cost, size, and power while enhancing security.

Part of the low-power cellular IoT ALT125x family, the ALT1255 shares a common software architecture, modem application, networking layer, and APIs with other modems in the family, enabling quick and easy integration within the Altair product ecosystem.

• LTE Radio Technology Support: CAT-NB1: 27.2 Kbps DL, 62.5 Kbps UL | CAT-NB2: 127 Kbps DL, 158 Kbps UL
• Highly Integrated SoC: ARM Cortex M4 MCU with 192KB RAM for user applications
• Carrier grade integrated SIM (iSIM)
• Secure boot architecture and robust hardware-based security framework
• WLCSP package for low-cost and small-size devices
• 3GPP Release 14 Features: Supporting eDRX, PSM, Relaxed monitoring, RAI, Large TBS and Dual HARQ processes
• Rich Application Layer: IPv4/v6 IP stack, TLS/DTLS, HTTP(s), MQTT, CoAP, LWM2M
• Cloud Connectors
• OneSKU™: Frequency range 617-960 MHz and 1695-2200 MHz
• HD-FDD bands: 1, 2, 3, 4, 5, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 66, 70, 71 and 85
• Interfaces: 3x UART, SPI, PSRAM, USIM, GPIOs, I2C, AUX ADC and PWM
• Optional support for 410-467.5 MHz bands: 31, 72, 73, 87, 88
• 2G quad band support: GSM-850, E-GSM-900, DCS-1800, PCS-1900
• Additional Features: LWM2M device management, Differential FOTA, Full reuse of globally commercial ALT1250 SW stack, AT commands, carrier features