The MediaTek MT6685 is a 5G module-optimized clock IC system-on-chip with nine clock buffers and four ADC input channels optimized for specific 5G module subsystems. Provides sophisticated controls for power-up and RTC alarms. The MT6685 is optimized for maximum battery life, allowing the RTC circuit to run for hours without a battery. The MT6685 uses an SPMI interface and an SRCLKEN control pin to control DCXOs, LDOs, and various drivers; It provides enhanced security controls and protocols for the handshake with the baseband. The MT6685 is available in a 42-pin WLCSP package. The operating temperature range is -30°C to +85°C. 1. Functional block diagram The MT6685 is a fully integrated, stand-alone DCXO target for 5G module clock providers. Below is a block diagram of the MT6685 clock IC, see Chapter 5 Application Information for more information.

Figure 1-1 Block diagram of MT6685 2. Outstanding features The MT6685 is ideal for clock ICs for 5G modules and other portable systems. • Handles baseband clock ICs for 5G modules. • Input range: 2.6~5V • 9 clock buffers and 4 ADC input channels optimized for specific 5G module subsystems. • 32K crystalless RTC oscillator for system timing, 1.8V clock buffer output • SPMI interface • Programmable under-voltage lockout protection • Watchdog reset • Flexible hardware clock IC reset function • Power-on reset and start timers • 42-pin WLCSP package 3. Pin information 3.1 Pin Diagram

Figure 3-1 MT6685 WLCSP 42 (2.2306*2.4958 mm) Pin Assignment (Top View) 3.2 Pin Description Table 3-1 Pin description of the MT6685