ISSI powers transportation innovation

Automotive and transportation systems continue to make technological advancements to solve problems in the world. Engineers want to efficiently design their systems with components that meet expectations. That's where ISSI comes in. ISSI offers a broad range of DRAM, SRAM, and Flash memory, along with AMS (analog/mixed signal), which are compatible with most any application processor, SoC, or FPGA. ISSI also provides long-term support and world class quality, a great reassurance for customers.

While many conventional vehicles still have a single battery to power the starter, hybrid (HEV) and fully electric vehicles (EV) have multiple batteries. Monitoring and keeping the charge of those batteries is key to great performance.

A battery management system (BMS) is any electronic system that manages a rechargeable battery (cell or battery pack), such as by protecting the battery from operating outside its safe operating area, monitoring its state, calculating secondary data, reporting that data, controlling its environment, authenticating it and / or balancing it. Reliable automotive grade Flash memory is important for code storage and data logging.

car battery

Battery state of charge during driving is usually displayed on the instrument cluster, readily visible by the driver to avoid range anxiety.

An LED driver such as the IS32FL3738 can be used to animate charge and discharge battery status.

block diagram of battery monitoring system
BMS diagram - click for larger image

Products:

Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
Search now: IS25LP080D (8Mb) | IS25LP016D (16Mb) | IS25LP032D (32Mb) | IS25LP064A (64Mb) | IS25LP128F (128Mb)

Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 80M/166Mhz
Search now: IS25LP256D (256Mb)

eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
Search now: IS22ES32G-JC(Q)LA1 (32GB)

1Gbit SPI NAND, WSON, SOIC-16, 3V
Search now: IS38SML01G1-LLA1

6×8 dot matrix LED driver with individual LED control
Search now: IS32FL3738

A convenient charging infrastructure is necessary to make electric vehicles practical. Drivers don’t want to go out of the way for a charge, and want to charge faster and more easily.

With the acceleration of the electric vehicle market, there’s an increased need for enhanced charging interfaces. As the driver pulls up to the charging station, a large, easy to read display is best for different vehicle heights and weather conditions. The screen or nearby LED indicator lights need to show the readiness status. Upon payment, wired and/or wireless interfaces are needed to communicate payment information, and tell the charging unit to begin. A charging status indicator light display charging status and are positioned to be visible from outside or inside the vehicle. The application requires DRAM or SRAM for data manipulation and screen frames for the HMI (human machine interface), while Flash is used for data logging and code storage.

electric vehicle charging station

During charging, LED lights will be illuminated in sequence, indicating the progress of the charging. All LEDs illuminate together when the vehicle is fully charged. In this case, they will turn off when the charge connector is removed, or after approximately five minutes. The IS32FL3237 12 RGB LED driver provides the brightness and LED control required for a bright animated charge status indicator.

The battery state of charge from the BMS of the vehicle is routinely communicated to the charging station over the power lines using powerline communication.

block diagram of vehicle charging
Vehicle charging diagram - click for larger image

Products:

Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
Search now: IS25LP080D (8Mb) | IS25LP016D (16Mb) | IS25LP032D (32Mb)

Serial NOR Flash, SOIC, WSON, BGA, 3V, 50M/133Mhz
Search now: IS25LP064A (64Mb) | IS25LP128F (128Mb)

Serial NOR Flash, SOIC, WSON, BGA, 3V, 80M/166Mhz
Search now: IS25LP256D (256Mb)

DDR2 DRAM, BGA(84), 1.8V, 666MT/s, 800MT/s
Search now: IS43DR16320E (512Mb - 32M x 16)

DDR3 DRAM, BGA(96), 1.35V, 1.5V, 1333MT/s, 1600MT/s, 1866MT/s
Search now: IS43TR16256BL (4Gb - 256M x 16)

36-channel, 16-bit PWM LED driver with dot correction
Search now: IS32FL3237 (36 Channel, 38mA/CH)

Drivers are increasingly expecting more performance and features in their center infotainment console. What was once simply an FM/AM radio, eventually included a cassette tape player, and later CD/MP3, in-vehicle infotainment (IVI) then evolved into a system with a rich set of features including vehicle stats, GPS navigation, music from many sources including satellite radio, internet streaming, Bluetooth connectivity, safety camera display, phone calling, cellular voice & data connectivity, and the commensurate apps. Ease-of-use, compatibility, and customization are all potential benefits that the driver may appreciate. A mid to high-end microprocessor is likely needed in order to support all the peripheral interfaces and provide the performance for the multiple algorithms running simultaneously. In the block diagram (below), the MPU plays the music from any source, but needs to be ready to show the camera view, or updated data from the vehicle at a moment’s notice. Often, lately the most prevalent choice for DRAM is multiple DDR3L devices. The Flash memory needed is usually both eMMC for media storage, and serial NOR for algorithm data.

man driving car

ISSI also provides innovative solutions to automotive system designer. ISSI’s capacitive touch sensing is reliable and flexible, but what it really enables is a much more aesthetic design and a next gen in-car experience for the driver and passengers. This can extend from the center-stack infotainment to a variety of user interfaces throughout the vehicle, such as illumination controls, indoor & outdoor touch sensor switches, liquid level sensors and many others. Product designers can quickly replace mechanical buttons with ISSI’s sleek and reliable capacitive-sensing user interfaces. There really is no limitation in how touch sensing can be used—with most any shape, surface materials, wide environmental conditions (humidity, temperature), and user-touch interface (gloves, wet or dirty surface, etc.). Utilizing the programmable capabilities of the ISSI touch sense solution enables a range of system solutions starting with direction, proximity or gesture recognition.

infotainment block diagram
Infotainment diagram - click for larger image

Products:

DDR3 DRAM, BGA(96), 1.35V, 1.5V, 1333MT/s, 1600MT/s, 1866MT/s
Search now: IS46TR16256BL (4Gb - 256M x16) | IS46TR16512BL (8Gb - 512M x16)

eMMC 5.0, BGA(153), BGA(100), 3.3V, 200MHz (HS400)
Search now: IS22ES04G-JC(Q)LA1 (4GB) | IS22ES08G-JC(Q)LA1 (8GB) | IS22ES16G-JC(Q)LA1 (16GB) | IS22ES32G-JC(Q)LA1 (32GB)

3x4 Dot Matrix LED driver with individual LED control
Search now: IS32FL3740

Serial NOR Flash, SOIC, USON, WSON, BGA, 3V, 50M/133Mhz
Search now: IS25LP016D (16Mb) | IS25LP032D (32Mb)

Serial NOR Flash, SOIC, WSON, BGA, 3V, 50M/133Mhz
Search now: IS25LP064A (64Mb) | IS25LP128F (128Mb)

Serial NOR Flash, SOIC, WSON, BGA, 3V, 80M/166Mhz
Search now: IS25LP256D (256Mb)

16-channel programmable capacitive touch sensor
Search now: IS32SE5110

15-channel programmable capacitive touch sensor
Search now: IS32SE5111

LPDDR4 DRAM, BGA(200), 1.1V/1.8V 3200 MT/s, 2666 MT/s
Search now: IS46LQ32128A (4Gbit - 128M x 32)

As electronics in our cars continue to become more sophisticated, ADAS (Advanced Driver-Assistance Systems) have taken center stage. These systems make many of the aspects of driving easier, and—most importantly—safer. Systems that prevent accidents save lives, and prevent injuries. The most advanced ADAS are usually first introduced in high-end vehicles, and often later become standard in most vehicles. Systems include Lane Departure Warning, Surround View Park Assist, Adaptive Cruise Control, Blindspot Detection/Monitoring, Night Vision, and Driver Monitoring. As the name indicates, Surround View Park Assist provides a clear and complete view around the vehicle, not just an image behind it. The driver can take into account potential obstacles and constraints while parking. Several cameras positioned around the vehicle capture the images, then they are buffered in the memory (DRAM), until sent to the display.

man sitting in autonomous car

The hallmark of most surround view systems is the presentation of all the different views together in a comprehensive image, such as a top view. In this manner, the driver can see everything in one glance. In order to accomplish this, the MPU must combine each image and apply mathematical mapping and alignment of images to create a realistic picture for the driver. The level of data manipulation and performance tends to require a higher end MPU and higher bandwidth DRAM than might otherwise be needed for single images. Data taken from the gear box, steering wheel, or speedometer is transmitted via CAN to the MPU which may select the appropriate image for the display, or be needed for calculations or the system algorithm. Sonar inputs on the bumpers are usually included in the system, and sound or vibration warnings may be issued to the driver to provide complete awareness. Typical system architecture (shown at left) enables the surround view park assist with audio and video feedback.

block diagram of park assist feature
Typical system architecture - click to see larger image

Products

LPDDR2 DRAM, BGA(134), BGA(168), 1.2V/1.8V, 533MHz, 400MHz
Search now: IS46LD32160A (512Mb - 16M x 32) | IS46LD32320C (1Gb - 32M x 32)

DDR3L memory, BGA(96), 1.35V, 1.5V, 1333 MT/s, 1600 MT/s, 1866 MT/s
Search now: IS46TR16128DL (2Gb - 128M x 16) | IS46TR16256ECL (4Gb - 256M x 16)

LPDDR4 DRAM, BGA(200), 1.1V/1.8V 3200 MT/s, 2666 MT/s
Search now: IS46LQ32128A (4Gbit - 128M x 32)

10W Mono Class-D Audio Amplifier, eTSSOP-16, 4.5V ~ 24V
Search now: IS32AP2123

Serial NOR Flash, SOIC, WSON, BGA, 3V/1.8V,50M/133Mhz
Search now: IS25LP032D (32Mb) | IS25WP032D (32Mb) | IS25LP064A (64Mb) | IS25WP064A (64Mb) | IS25LP128F (128Mb) | IS25WP128F (128Mb)

Serial NOR Flash,SOIC, WSON, BGA, 3V/1.8V, 80M/166Mhz
Search now: IS25LP256D (256Mb) | IS25WP256D (256Mb)

High Speed Async ECC SRAM, TSOP2(44),BGA(48), 2.4V - 3.6V, 10 ns
Search now: IS64WV25616EDBLL (4Mb) | IS64WV51216EDBLL (8Mb)

High Speed Async ECC SRAM, TSOP2(44),BGA(48), 2.4V - 3.6V, 10 ns
Search now: IS64WV102416EDBLL (16Mb)

GBL - Transportation Solutions

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Transportation solutions

From vehicle electrification to automotive infotainment and ADAS, Avnet helps you lead the pack in transportation solutions

traffic speeding down busy highway