BQ79600-Q1 - Automotive SPI/UART Bridge IC | Texas Instruments
MPN: BQ79600-Q1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for BQ79600-Q1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
BQ79600PWRQ1
β Drop-Inπ Reference alternative (not in catalog)
BQ79600-Q1 Maximum Ratings & Electrical Characteristics
| Function | SPI/UART to daisy-chain bridge |
| Host Interface | SPI or UART |
| Daisy-Chain Interface | Proprietary TI BMS protocol |
| Supply Voltage (VBAT) | [DATA_NEEDED: Supply voltage range] |
| VIO Voltage Range | [DATA_NEEDED: VIO voltage range] |
| Operating Temperature | -40Β°C to +125Β°C |
| Package | 16-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Functional Safety | ASIL-D compliant |
| Automatic Host Wakeup | Yes (via INH pin) |
| Sniff Detector | Yes |
| AEC-Q100 | Qualified |
| RoHS | Compliant |
| REACH | Compliant |
| Lead-Free | Yes |
BQ79600-Q1 Pin Configuration
| Pin 1 | VIO β I/O supply voltage for level shifting |
| Pin 2 | SCLK β SPI clock input |
| Pin 3 | SDI β SPI data input |
| Pin 4 | SDO β SPI data output |
| Pin 5 | CS β SPI chip select |
| Pin 6 | UART_TX β UART transmit |
| Pin 7 | UART_RX β UART receive |
| Pin 8 | INH β Inhibit/wakeup output |
| Pin 9 | NFAULT β Fault output |
| Pin 10 | GND β Ground |
| Pin 11 | VBAT β Battery supply |
| Pin 12 | DCP β Daisy-chain positive |
| Pin 13 | DCN β Daisy-chain negative |
| Pin 14 | NC β No connect |
| Pin 15 | NC β No connect |
| Pin 16 | NC β No connect |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
BQ79600-Q1 is suitable for 6 applications: Automotive Battery Management System (BMS), Electric Vehicle (EV) Battery Pack Monitoring, Hybrid Electric Vehicle (HEV) Battery Management, Energy Storage Systems (ESS), Low-Power Standby with Automatic Wakeup, Functional Safety Compliant BMS.
Automotive Battery Management System (BMS)
The BQ79600-Q1 serves as the communication bridge between the MCU and TI battery monitoring ICs in automotive BMS. It translates SPI/UART signals to the daisy-chain protocol, enabling reliable communication with multiple battery cells. Its ASIL-D compliance and AEC-Q100 qualification make it suitable for safety-critical EV and HEV applications. The automatic host wakeup feature allows the system to wake from low-power modes on fault detection, improving efficiency and safety.
Recommended
Electric Vehicle (EV) Battery Pack Monitoring
In EV battery packs, the BQ79600-Q1 interfaces the vehicle's MCU to the battery monitoring ICs across a daisy chain. It supports high-voltage isolation and robust communication, essential for accurate cell voltage and temperature monitoring. The device's functional safety features help meet ASIL-D requirements, ensuring safe operation. Its compact 16-TSSOP package fits space-constrained battery management boards.
Recommended
Hybrid Electric Vehicle (HEV) Battery Management
The BQ79600-Q1 enables communication between the HEV's MCU and TI battery monitors, supporting the high cell counts typical in HEV packs. Its SPI/UART interface allows flexible MCU integration, while the daisy-chain protocol reduces wiring complexity. The automatic host wakeup feature is beneficial for HEV systems that frequently enter low-power states, allowing quick response to faults.
Recommended
Energy Storage Systems (ESS)
For stationary energy storage, the BQ79600-Q1 bridges the MCU to TI battery monitors in large-scale battery racks. It supports long daisy-chain lengths, enabling monitoring of many cells. The device's wide operating temperature range and automotive-grade reliability make it suitable for industrial ESS environments. Its functional safety compliance helps meet regulatory standards for energy storage safety.
Recommended
Low-Power Standby with Automatic Wakeup
The BQ79600-Q1's automatic host wakeup feature is ideal for systems that need to conserve power while monitoring battery health. In shutdown mode, the device uses a sniff detector to listen for fault tones on the daisy-chain. When a fault is detected, it wakes the host MCU via the INH pin, enabling rapid response without continuous polling. This reduces system power consumption in standby.
Recommended
Functional Safety Compliant BMS
The BQ79600-Q1 is designed for functional safety applications up to ASIL-D. It includes features like fault detection and automatic host wakeup to support safe battery management. When used with TI battery monitors, it enables a safety-certified BMS architecture. Engineers can leverage its compliance to simplify safety certification of their systems.
Recommended
Recommended Products Summary
Engineering reference data for BQ79600-Q1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | BQ79600PWRQ1 | BQ79616-Q1 | BQ79731-Q1 |
|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | HTQFP-64 | HTQFP-64 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Function | SPI/UART to daisy-chain bridge | SPI/UART to daisy-chain bridge | Battery monitor | Battery monitor |
| Host Interface | SPI or UART | SPI or UART | Daisy-chain only | Daisy-chain only |
| Automatic Host Wakeup | Yes | Yes | No | No |
| Functional Safety | ASIL-D | ASIL-D | ASIL-D | ASIL-D |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified |
| Supply Voltage | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Only bridge IC for TI BMS daisy-chain (vs BQ79616-Q1)
- Automatic host wakeup (vs BQ79616-Q1)
- Compact 16-TSSOP package (vs BQ79616-Q1)
Design Notes
Ensure the VIO pin is connected to the same voltage rail as the MCU's I/O supply to maintain proper logic levels. Place decoupling capacitors close to the VBAT and VIO pins, typically 0.1uF and 1uF, to filter noise. Follow the layout guidelines in the datasheet for the daisy-chain interface to minimize signal integrity issues.
Do not leave the INH pin floating; connect it to the MCU's wakeup input. Ensure the daisy-chain termination is correct to avoid reflections. When using SPI, verify the clock polarity and phase match the MCU's settings. For UART mode, set the baud rate correctly to match the battery monitors.
The BQ79600-Q1 is a low-power device, but in high-temperature automotive environments, ensure adequate PCB copper area for heat dissipation. The 16-TSSOP package has a thermal resistance that should be considered. Refer to the datasheet for thermal information and derating curves.
Compliance Information
AEC-Q100 qualified per TI product page. RoHS and REACH compliant per TI. Halogen-free status not specified in provided data.
