NAND flash memory is a type of non-volatile memory technology that is widely used for data storage in a variety of electronic devices, ranging from USB drives and memory cards to solid-state drives (SSDs) and embedded systems. It’s called “NAND” because it uses a NAND gate structure in its memory cell design. NAND flash offers high storage density, fast read and write speeds, and relatively low cost compared to other types of non-volatile memory.

Part Number: H27U2G8F2C

Function: 2 Gbit (256M x 8 bit) NAND Flash

Package: TSSOP 48, FBGA63 Pin Type

Manufacturer: Hynix

Images:

Description

H27U2G8F2C series is a 256Mx8bit with spare 8Mx8 bit capacity.  The device is offered in 3.0/1.8 Vcc Power Supply, and with x8 and x16 I/O interface Its NAND cell provides the most cost-effective solution for the solid state mass storage market. The memory is divided into blocks that can be erased independently so it is possible to preserve valid data while old data is erased

The device contains 2048 blocks, composed by 64 pages. Memory array is split into 2 planes, each of them consisting of 1024 blocks. Like all other 2KB – page NAND Flash devices, a program operation allows to write the 2112-byte page in typical 200us(3.3V) and an erase operation can be performed in typical 3.5ms on a 128K-byte block.

Block Diagram:

Features:

1. DENSITY
– 2Gbit: 2048blocks

2. Nand FLASH INTERFACE

– NAND Interface

– ADDRESS / DATA Multiplexing

3. PAGE READ / PROGRAM

– Random access: 25us (Max)

– Sequential access: 25ns / 45ns (3.0V/1.8V, min.)

– Program time(3.0V/1.8V): 200us / 250us (Typ)

– Multi-page program time (2 pages): 200us / 250us (3.0V/1.8V, Typ.)

H27U2G8F2C PDF Datasheet

Part Number: KS8993, KSZ8993

Function: 3-Port 10/100 Integrated Switch

Package: 128-Pin PQFP Type

Manufacturer: Micrel Semiconductor

Images:

Description

The KS8993 contains three 10/100 physical layer transceivers, three MAC (Media Access Control) units with an integrated layer 2 switch. The device runs in two modes. The first mode is a three port integrated switch and the second is as a three port switch with the third port decoupled from the
physical port. In this mode access to the third MAC is provided using a reverse or forward MII (Media Independent Interface) such that an external MAC can be directly connected to the KS8993. This interface also supports the 7-wire (serial network interface) as used by some routing devices. […]

Features

• 3-port 10/100 integrated switch with physical layer transceivers

• 64k Byte of SRAM on chip for frame buffering

• 1.0Gbps high performance memory bandwidth

• 10BaseT, 100BaseTX and 100BaseFX modes of operation

• Support for UTP or fiber installations

• Superior analog technology for reduced power and die size

• Supports port based VLAN

Pinouts:

A 3-port 10/100 integrated switch is a networking device commonly used to connect multiple Ethernet devices together within a local area network (LAN).

1. 3-Port: This indicates that the switch has three Ethernet ports available for connecting devices. These ports are used to link computers, printers, networked storage devices, or other networking equipment.

2. 10/100: This refers to the speed at which the switch can operate. It supports both 10 Mbps (megabits per second) and 100 Mbps Ethernet connections. These are standard Ethernet speeds used in many older and some current networking devices. However, they are slower than the more modern Gigabit Ethernet (1000 Mbps) or 10 Gigabit Ethernet (10,000 Mbps) standards.

KS8993 PDF Datasheet