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Apple iPhone XS and XS Max might support 802.11ax (Wi-Fi 6)

Discussion in 'General Wireless Discussion' started by Balance, Oct 9, 2018.

  1. Balance

    Balance Regular Contributor

    Joined:
    Sep 4, 2017
    Messages:
    58
    According to Tech Insights the new iPhones use a Broadcom BCM4377 Wi-Fi/Bluetooth wireless combo SoC. The BCM4377 is not publicly listed, and probably custom made for Apple. The closest related however is the BCM4375, also a Wi-Fi/Bluetooth combo chip. And it supports 802.11ax (recently branded as Wi-Fi 6 by the Wi-Fi Alliance).

    BCM4375
    Dual-Band 802.11ax Wi-Fi/Bluetooth 5.0+ Combo Chip
    The BCM4375 simultaneously implements two streams of 802.11ax with Bluetooth 5.0+ to enable Wi-Fi speeds up to 1.429 Gb/s on mobile devices such as smartphones and tablets.

    Features
    • Support for two streams of 802.11ax
    • Bluetooth 5.0+ including Low-Energy Long Range (LELR)
    • Real Simultaneous Dual-Band (RSDB)
    • 1.429 Gbps PHY rate
    • 1024 QAM modulation
    • OFDMA
    • MU-MIMO
     
    Internet Man and psychopomp1 like this.
  2. Internet Man

    Internet Man Senior Member

    Joined:
    Sep 1, 2017
    Messages:
    367
    It looks like BCM4377 is stamped over BCM4359 in the image from Tech Insights. The BCM4359 is a 2x2 802.11ac chip for smartphones. Some details are available on AnandTech. The BCM4361 and BCM4371 were also 2x2 802.11ac parts with the BCM4361 (Samsung Galaxy S8) having BT 5.0. I wouldn't assume that the BCM4377 is a revised BCM4375 quite yet.

    The Test Report document at the FCC says, "There are two vendors of the WiFi/Bluetooth radio modules: variant 1 and variant 2. The Wi-Fi/Bluetooth radio modules have the same mechanical outline (e.g., the same package dimension and pin-out layout), use the same on-board antenna matching circuit, have an identical antenna structure, and are built and tested to conform to the same specifications and to operate within the same tolerances."

    I wonder if this refers to the BCM4359 and BCM4377. It may also refer to identical packages from USI and Broadcom.
     
    Last edited: Oct 9, 2018