NXP Semiconductors Document Number: MM9Z1 638D1 Rev. 5.0, 11/2016 Data Sheet: Technical Data Intelligent battery sensor with MM9Z1 638 CAN and LIN The MM9Z1 638 is a fully integrated intelligent battery monitoring BATTERY MONITORING SYSTEM system. The device supports precise current measurement via an external shunt resistor. It features four voltage measurements via internal calibrated resistor dividers or external dividers. It includes an internal temperature sensor, allowing close proximity battery temperature measurements, plus four external temperature sensor inputs. The MM9Z1 638 features the LIN 2.2 protocol and physical interface, as well as an msCAN protocol controller, for interfacing to automotive buses. The MM9Z1 638 is able to supply and control external CAN interfaces. EP SUFFIX (WF-TYPE) This device is powered by SMARTMOS technology. 98ASA00343D Features 48-PIN QFN Wide range battery current measurement On-chip temperature measurement Applications Four battery voltage measurements with internal resistor dividers, and up to five direct voltage measurements for use with an external resistor 12 V lead-acid battery monitoring divider Multi-cell battery (Li-ion) monitoring Measurement synchronization between voltage channels and current HV battery pack sensor channels Truck battery monitoring Five external temperature sensor inputs with internal supply for external sensors Low-power modes with low-current operation Multiple wake-up sources: LIN, timer, high-voltage input, external CAN interface, and current threshold and integration Precision internal oscillator and connections for external crystal LIN 2.2/ 2.1/ 2.0 protocol and physical interface msCAN protocol controller, and supply capability for 8 and 14 pin CAN interfaces MM9Z1 638: S12Z microcontroller with 96/128 kByte Flash, 8.0 kByte RAM, 4.0 kByte EEPROM MM9Z1 638 MM9Z1 638 VSUP Battery VSUP Pack VSENSE3 VSENSE2 VSENSE2 VDDX 12V Vehicle VDDA VDDA PA0 LIN bus PTB0 T PTB2 LIN EN VDD T PTB5 TxD TX PTB5 CAN PTB1 T interface VDDX RxD RX PA0 CANL CANH ISENSEH VSENSE1 Shunt EN VDD VSENSE0 TxD TX ISENSEL PTB4 CAN GNDs Interface Vehicle RxD RX CAN bus CANL CANH PTB4 ISENSEH 12 V Application, CAN Communication Shunt ISENSEL GNDs Vehicle CAN bus Multiple Cell Monitoring, CAN & LIN Communication, Figure 1. 12 V simplified application diagrams 2016 NXP B.V.MM9Z1 638 HV Switch PTB2 PTB1 HV Pack PTB0 HV Switch ISENSEH ISENSEL GNDs Figure 2. Simplified application diagram for HV pack monitoring - Use of an external divider principle schematic MM9Z1 638 2 NXP Semiconductors