SST26VF064B-104I-SM Detailed explanation of pin function specifications and circuit principle instructions

The part number SST26VF064B-104I/SM belongs to Microchip Technology (previously known as SST, Silicon Storage Technology), which is a company known for manufacturing non-volatile memory products, including NOR Flash memory.

Packaging:

The SST26VF064B-104I/SM is available in a 8-pin SOIC (Small Outline Integrated Circuit) package (indicated by "SM" suffix).

Pin Function Specifications:

The detailed pinout and descriptions for the SST26VF064B-104I/SM in the 8-pin SOIC package are as follows:

Pin Number Pin Name Pin Function Description 1 VCC Power Supply Pin. This pin is connected to the positive voltage supply. For SST26VF064B, VCC is typically 2.7V to 3.6V. 2 CE# Chip Enable Pin. Active low, used to select the device when accessing memory. When not asserted, the device is disabled and not active. 3 RESET# Reset Pin. Active low, used to reset the memory device to its default state. 4 SO Serial Output Pin. This pin transmits data from the memory device to the host controller. It is used for SPI communication. 5 SI Serial Input Pin. This pin receives data from the host controller to write to the memory device. It is used for SPI communication. 6 SCK Serial Clock Pin. This pin provides the clock signal for SPI communication, synchronized with the other data signals (SI and SO). 7 WP# Write Protect Pin. Active low, when asserted, write operations to the memory are disabled, making the memory read-only. 8 GND Ground Pin. Connect to system ground.

Pin Function List (Complete):

This memory device uses 8 pins in the SOIC package, with the following detailed pin functions:

VCC (Pin 1): Power supply for the device. Voltage range is typically 2.7V to 3.6V. CE# (Pin 2): Chip enable, active low. Used to enable or disable the chip for read or write operations. RESET# (Pin 3): Reset pin, active low. Used to reset the device to its initial state. SO (Pin 4): Serial Output, used to transmit data to the host during read operations. SI (Pin 5): Serial Input, used to receive data from the host during write operations. SCK (Pin 6): Serial Clock, used for synchronizing data transfers between the device and the host. WP# (Pin 7): Write Protect, active low. When asserted, disables write operations to the device, making it read-only. GND (Pin 8): Ground, connected to the system ground.

Circuit Principle Instructions:

The SST26VF064B-104I/SM is a NOR flash memory device that operates through the SPI (Serial Peripheral interface ) protocol, allowing for data to be written or read sequentially.

VCC provides power to the memory. The chip is selected for communication via CE#. When CE# is low, the device is active and can communicate with the microcontroller or host system. The RESET# pin is used to reset the device, returning it to its initial state if required. Data is exchanged through the SI and SO pins, with SI for writing and SO for reading. These pins are connected to the corresponding SPI data lines of the microcontroller. The SCK pin provides a clock signal to synchronize the data exchange between the microcontroller and the memory. WP# can be used to prevent accidental writes to the memory by asserting the pin low. The device is grounded through GND.

20 FAQ for the SST26VF064B-104I/SM:

What is the operating voltage range of the SST26VF064B-104I/SM? The operating voltage range is 2.7V to 3.6V.

How is the SST26VF064B-104I/SM programmed? It is programmed using the SPI interface by sending data through the SI pin.

**What is the purpose of the *WP#* pin?** The WP# pin is used to write protect the memory, preventing accidental writes when low.

**Can I use the SST26VF064B-104I/SM without the *RESET#* pin?** No, the RESET# pin is essential for initializing and resetting the device to a known state.

**What does the *CE#* pin do?** The CE# pin is used to enable or disable the chip for communication. It must be low to allow communication.

Is it possible to read data from the SST26VF064B-104I/SM without powering it? No, the device must be powered on to read or write data.

How fast can the SST26VF064B-104I/SM operate? The operating speed depends on the clock frequency of the SCK pin. The device supports SPI communication at high clock rates.

**What happens if I connect *SCK* and SI incorrectly?** The device will not function correctly. SI is for input (writing data), and SCK is for the clock signal. Misconnecting these pins would result in failed communication.

Is the SST26VF064B-104I/SM compatible with 5V logic systems? No, the device is designed to work with 2.7V to 3.6V logic, and using 5V logic may damage the device.

What is the maximum clock frequency supported by the SST26VF064B-104I/SM? The maximum supported clock frequency is typically 104 MHz, but this depends on the specific implementation and conditions.

Can the SST26VF064B-104I/SM be used for wear leveling? No, the SST26VF064B-104I/SM does not have internal wear leveling. You would need to implement wear leveling in the system design if necessary.

How do I erase the entire memory of the SST26VF064B-104I/SM? Erasing is done via SPI commands, and you would issue an erase command through the SI pin while providing the correct clock signal on SCK.

Can I write to the SST26VF064B-104I/SM while it is being read? No, the device does not support simultaneous read/write operations. You must perform one operation at a time.

What is the lifespan of the SST26VF064B-104I/SM in terms of program/erase cycles? The typical endurance is 100,000 program/erase cycles.

How do I connect the SST26VF064B-104I/SM to a microcontroller? You connect SI, SO, SCK, and CE# to the corresponding SPI pins on the microcontroller.

Can I use multiple SST26VF064B-104I/SM devices in parallel? Yes, but each device should have a unique CE# line to enable communication with the desired device.

Is the SST26VF064B-104I/SM suitable for use in automotive applications? It is recommended to check the device's environmental specifications for automotive applications, as it is not specifically designed for extreme conditions.

**What happens if I leave *CE#* high all the time?** If CE# is high, the device will be disabled, and no communication will occur.

How do I handle faulty data during read or write operations? Ensure that your data is properly framed, and the clock signal is synchronized. Incorrect data may result from misalignment of SI, SO, and SCK.

Can I replace the SST26VF064B-104I/SM with another part number? You should consult the datasheet for any alternate parts that meet the same specifications, as replacement devices may have different electrical or physical characteristics.

Conclusion:

This detailed breakdown covers the 8-pin SOIC package's pin functions and explains the key features and questions you might have regarding the SST26VF064B-104I/SM.