Datasheet Multiple Input Switch Monitor LSI for Automotive BD3375KV-C General Description Specifications (Note 1) BD3375KV-C is a 22-channel Multiple Input Switch AEC-Q100 Qualified Monitor IC that detects the opening and closing of Operational Voltage Range: 3.9V to 8V mechanical switches. Once it senses a change in the Uses 3.3/5.0V SPI protocol in communicating with the status of a switch, it sends an interrupt signal to the MCU MCU via a serial peripheral interface (SPI). Serial communication error checking through 8bit-CRC The 22 switch inputs have two types of power supply, Thermal Shutdown Protection (TSD) VPUB and VPUA. The VPUB and the VPUA power Power on Reset (POR) supplies can either be from a battery or from another Selectable source/sink current levels through register power supply system. VPUB is the supply for the INB settings inputs while VPUA is for the INZ and INA inputs. Wetting current timer capability BD3375KV-C has two modes of operation, Normal and 8 source or sink input terminals Sleep. In both modes, the internal registers can be set to 14 source input terminals make the device perform either intermittent or continuous Separable Power Supply monitoring of the switches. VPUA: 16ch (INA&INZ), VPUB: 6ch (INB) In intermittent monitoring, the switch status is monitored Interrupt notification upon switch status change at regular time intervals, allowing the IC to operate with 1 to 6 times matched LPF that eliminates input terminal low power consumption. Also, operation with reduced noise noise can be achieved by enabling uniform sequential Low current consumption (Intermittent monitoring) monitoring of all switches or sequential monitoring by Status display of selected terminal at DMUX terminal power supply system. (Note 1) Grade 1 Application Package W(Typ) x D(Typ) x H(Max) VQFP48C 9.00mm x 9.00mm x 1.60mm Engine Control Module (48 pin QFP) Key Specifications Fully Functional Voltage Range: 8V to 26V Switch Input Voltage Range: -14V to +40V Selectable Wetting Current (Min): 1mA, 3mA, 5mA, 10mA, 15mA Typical Application Circuit DCDC +B VPUA/VPUB VIN VOUT1 BD3375KV-C 040 10k +B INZ0 100k VPUB 0.1F 0.1F VPUA/+B VPUA VPUA/VPUB 0.1F 040 VPUA INZ7 VOUT2 ENABLE 0.1F WAKEB MCU 040 WATCHDOG INA0 RESET 0.1F INTB INTB 040 INA7 0.1F SI SI VIN SCLK SCLK 040 INB0 CSB CS 0.1F SO SO 040 INB5 DMUX IO 0.1F REF5 VDDI 0.1F LVDD 4.7F AVDD TEST GND Figure 1. Typical Application Circuit Product structure : Silicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0E3E0HZ00730-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/72 27.Sep.2016 Rev.002 TSZ22111 14 001 GND TEST DMUX CSB SCLK SI SO N.C. VDDI N.C. INTB GND BD3375KV-C Pin Configuration 36 35 34 33 32 31 30 29 28 27 26 25 37 N.C. GND 24 38 VPUA INB5 23 39 VPUA INB4 22 40 INZ0 INB3 21 41 INZ1 INB2 20 42 INZ2 INB1 19 43 INZ3 INB0 18 44 INZ4 N.C. 17 45 INZ5 AVDD 16 46 15 INZ6 REF5 47 INZ7 LVDD 14 48 WAKEB N.C. 13 1 2 3 4 5 6 7 8 9 10 11 12 Figure 2. Pin Configuration (Top View) www.rohm.com TSZ02201-0E3E0HZ00730-1-2 2016 ROHM Co., Ltd. All rights reserved. 2/72 27.Sep.2016 Rev.002 TSZ22111 15 001 GND INA7 INA6 INA5 INA4 INA3 INA2 INA1 INA0 VPUB VPUB N.C.