DP83959

Features:

·Fully IEEE 802.3 Ethernet Repeater compliant
· Eight IEEE 802.3 10BASE-T compliant ports with on-chip transmit filters
· One IEEE 802.3 compatible AUI port
· Direct drive status LED outputs
· Network traffic level monitor with direct drive LED outputs
· Automatic internal power-on reset function. External TTL compatible reset pin provided for device testing if required
· Inter-LERIC™ bus for cascading up to 3 devices on a single board
· Register/LED status interface compatible with DP83955/6 LERIC™ products
· Single 20 MHz crystal or external 20 MHz oscillator module operation
· Single 5V supply
·160 pin PQFP package


Pinout




Specifications

Supply Voltage (VCC)                              -0.5V to 7.0V
DC Input Voltage (VIN)                  -0.5V to VCC + 0.5V
DC Output Voltage (VOUT)            -0.5V to VCC + 0.5V
Power Dissipation (PD) (Note 1)                           4.5 W
Storage Temperature Range (TSTG)   -65°C to 150°C
Lead Temp. (TL) (Soldering, 10 sec)                   260°C
ESD Rating
    (RZAP = 1.5k, CZAP = 120 pF)                       2.0 kV


Description

The DP83959 8-Port Lite Ethernet Repeater Interface Controller (LERIC8) is a single chip solution for unmanaged 10BASE-T Ethernet repeater (hub) products. By integrating electronics needed to support eight 10BASE-T ports, a full level/drive compatible AUI port for a backbone connection, and an internal power on reset circuit, a DP83959 LERIC8 based design requires only the addition of a few passive components: crystal, transformers, connectors and a power source.

The DP83959 LERIC8 provides on-chip LED drivers that connect directly to LEDs via series resistors. In addition to the Link OK, Port Partition, Global Activity and Global Collision LED outputs, the LERIC8 provides an on chip network traffic level monitor circuit with 8 LED outputs to drive a bargraph type display.

The DP83959 LERIC8 also provides an LED and Inter Repeater Bus interface that is compatible with the DP83955/6 LERIC™ products.