Description:The 71V30 high-speed 1K x 8 Dual-Port Static RAM is designed to be used as a stand-alone 8-bit Dual-Port SRAM. It has two independent ports with separate control, address, and I/O pins that permit independent, asynchronous access for reads or writes to any location in memory. An automatic power down feature, controlled by CE, permits the on chip circuitry of each port to enter a very low standby power mode.
Renesas provides a recommended PCB layout guide in their application note (R01AN0265EJ0100) which includes thermal design considerations, such as placing thermal vias under the package and using a solid ground plane to reduce thermal resistance.
Renesas recommends using an external POR circuit with a voltage supervisor IC, such as the RP108 series, to ensure a reliable power-on reset. The POR circuit should be designed to detect the power supply voltage and generate a reset signal to the 71V30S55TFG when the voltage is below a certain threshold.
To reduce EMI and noise, Renesas recommends using a multi-layer PCB with a solid ground plane, placing decoupling capacitors close to the 71V30S55TFG, and using shielded cables for signal lines. Additionally, the system design should include EMI filters and ferrite beads to reduce high-frequency noise.
To ensure reliable data retention, Renesas recommends following the recommended flash programming and erase procedures, using the correct flash programming voltage, and avoiding excessive temperature and voltage stress on the device.
The internal oscillator has a typical frequency accuracy of ±1.5%. To improve accuracy, Renesas recommends using an external crystal oscillator or a high-accuracy external clock source. Additionally, the internal oscillator can be calibrated using the built-in calibration circuitry.
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71V30S55TFG Overview
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