DP83936AVUL-25 National Semiconductor, DP83936AVUL-25 Datasheet - Page 5

• Manufacturer Part Number: DP83936AVUL-25
• Description: IC CTRLR ORIENT NETWORK 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83936AVUL-25

• Controller Type: Network Interface Controller (NIC)
• Interface: Twisted Pair
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 140mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-MQFP, 160-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83936AVUL-25

NETWORK INTERFACE PINS
EXT
AUI TP
TXOd
TXO
RXI
TXLED
RXLED
COLED
POLED
LINKLED
LNKDIS
LOWSQL
2 0 Pin Description
I
O
Z
ECL
TP
e
e
a
e
Symbol
b
e
a
e
RXI
TXOd
TXO
Input
Output
TRI-STATE Input TTL compatible
Emitter Coupled Logic type drivers for interfacing to
the Attachment Unit Interface
Totem Pole type drivers These drivers are driven
either high or low and are always driven Drive lev-
els are CMOS compatible
b
b
a
Driver
Type
TPI
TPI
TP
TP
TP
TP
TP
Direction
O
O
O
O
O
O
I
I
I
I
I
EXTERNAL ENDEC SELECT Tying this pin to V
ENDEC and allows an external ENDEC to be used Tying this pin to ground (EXT
enables the internal ENDEC This pin must be tied either to V
alternate pin definitions for CRSo CRSi COLo COLi RXDo RXDi RXCo RXCi and
TXCo TXCi When EXT
pin definition is used
ATTACHMENT UNIT INTERFACE (AUI) TWISTED PAIR (TP) SELECT Tying this pin
to V
pin to GND (AUI TP
unit
TWISTED PAIR TRANSMIT OUTPUTS These high drive CMOS level outputs are
resistively combined external to the chip to produce a differential output signal with
equalization to compensate for Intersymbol Interference (ISI) on the twisted pair medium
TWISTED PAIR RECEIVE INPUTS These inputs feed a differential amplifier which
passes valid data to the ENDEC module
TRANSMIT An active low output It is asserted for approximately 50 ms whenever the
SONIC-T Controller transmits data in either AUI or TPI modes
RECEIVE An active low output It is asserted for approximately 50 ms whenever receive
data is detected in either AUI or TPI mode
COLLISION An active low output It is asserted for approximately 50 ms whenever the
SONIC-T Controller detects a collision in either AUI or TPI modes
POLARITY An active low output This signal is normally inactive When the TPI module
detects seven consecutive link pulses or three consecutive received packets with
reversed polarity it is asserted
GOOD LINK An active low output This pin operates as an output to display link integrity
status if this function has not been disabled by the LNKDIS pin described below This
output is off if the SONIC-T Controller is in AUI mode or if link testing is enabled and the
link integrity is bad (i e the twisted pair link has been broken)
This output is on if the SONIC-T Controller is in Twisted Pair Interface (TPI) mode link
integrity checking is enabled and the link integrity is good (i e the twisted pair link has
not been broken) or if the link testing is disabled
LINK DISABLE When this pin is tied to GND (LNKDIS
generation and integrity checking function are both disabled
LOW SQUELCH SELECT Tying this pin to V
to use a squelch threshold level lower than that of the 10BASE-T specification (see
Section 3 1)
CC
(AUI TP
TABLE 2-1 Pin Description
e
1) enables the AUI mode for interface with the ENDEC unit Tying this
e
5
0) enables the TPI Module mode for interface with the ENDEC
e
0 the first pin definition is used and when EXT
TRI
OC
TPI
Pin names which contain a ‘‘ ’’ indicate dual function pins
e
e
e
TRI-STATE drivers These pins are driven high low
or TRI-STATE Drive levels are CMOS compatible
These pins may also be inputs (depending on the
pin)
Open Collector type drivers These drivers are
TRI-STATE when inactive and are driven low when
active These pins may also be inputs (depending
on the pin)
Twisted Pair Interface
Description
CC
(LOWSQL
CC
(EXT
e
e
0) the link test pulse
e
1) disables the internal
CC
1) sets the squelch mode
or ground Note the
http
e
www national com
1 the second
e
0)