Memory

Introduction of EEPROMs for SSDs (VPD)

Serial Presence Detect EEPROM

ABLIC provides Vital Product Data (VPD) EEPROMs for SSDs (Solid State Drives).
ABLIC also provides a lineup of temperature sensors ideal for data centers, servers and high-end PCs, and a lineup of VPDs with SMBus ARP (Address Resolution Protocol) function, which support the development of a wide variety of SSDs.

 

1. What is a VPD EEPROM?

VPD is a device designed to store information about PCIe SSD as shown in "Table 1".

Table 1
The information stored in VPD
Basic inventory information
e.g., Type/Size/Manufacture/Date/Revision/GUID
Power management data
e.g., Power level/Power mode
Vendor specific data
e.g., Vendor ID/Part numbers
PCIe Port multi-Record
e.g., Connection information for each port (port0/port1)
etc.

What is a VPD EEPROM?

VPD is a device that connects to the SSD controller and the host via SMBus. Users can write/read information and data via SMBus.
VPD EEPROMs are particularly in demand for multi-part PCIe SSDs, where interconnected information is becoming more complex.

 

2. ABLIC's VPD EEPROMs

ABLIC's VPD EEPROMs support the development of PCIe SSDs for data centers, servers and high-end PCs.
By using ABLIC VPD EEPROMs, the following is possible:

  1. Enhance thermal throttling performance (S-585AA)
    • Using a built-in ±0.25℃ typ. high-accuracy digital temperature sensor.
  2. Able to add SSDs while power is on (S-585AA)
  3. Can be connected to a low voltage 1.8V AUX power supply (S-585AA, S-34TS04L)
    • With a 1.7V min low-voltage operation.

*Hot-plug: a mechanism that allows devices to be connected or faulty components to be replaced while the system is operational.

What is SMBus ARP (Address Resolution Protocol) function?

The SMBus ARP is a function that allows a HOST to assign arbitrary addresses to target devices using the SMBus; this allows for easy SSD adding.

What is SMBus ARP (Address Resolution Protocol) function?

Benefits

  1. Able to add SSDs while power is on with Hot-plug
  2. Able to add more than 32 SSDs per Host
  3. Able to remove external multiplexer

 

 

 

3. Why we propose our products for SSD

ABLIC offers VPD EEPROMs with built-in SMBus ARP function and high temperature accuracy.

Why we propose our products for SSD

S-585AA 4k-bit VPD EEPROM,
Built-in Temp. Sensor and SMBus ARP function,
High temperature accuracy ±0.25°C typ.

Datasheet

chip1stop corestaFF ONLINE Digi-Key MOUSER
S-34TS04L 4k-bit VPD EEPROM,
Built-in Temp. Sensor, 1.7Vmin operation

Datasheet

chip1stop corestaFF ONLINE Digi-Key MOUSER

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4. Related information

ABLIC offers a lineup of ICs that are ideal for SSDs, in addition to those for VPDs.

S-5852A Digital temperature sensor ideal for temperature monitoring

Datasheet

chip1stop corestaFF ONLINE Digi-Key MOUSER
S-1009 Reset IC ideal for system reset and PLP (PowerLoss Protection)

Datasheet

chip1stop corestaFF ONLINE Digi-Key MOUSER

In addition to SPD EEPROMs for DIMMs, ABLIC provides a range of ICs that are perfect for devices used in data centers. For more details, please refer to ICs Ideal for Data Center.