dp83222 National Semiconductor Corporation, dp83222 Datasheet - Page 5

• Manufacturer Part Number: dp83222
• Description: Cyclone Twisted Pair Fddi Stream Cipher Device
• Manufacturer: National Semiconductor Corporation

2 0 Pin Table
3 0 Pin Definitions and Connection Diagrams
V
GND
ECLV
ECLGND
EXTV
RXD
RXC
TXD
TXC
SCO
DSCO
RXCO
ENC0
ENC1
CD
SD
Signal
CC
g
g
g
g
g
CC
CC
g
g
FIGURE 5 DP83222 Pinout
7 16 28
1 4 11 15
21
22
23
3 2
5 6
18 17
13 14
19 20
27 26
24 25
9
8
10
12
28-Pin PLCC
Pin No
V
GND
ECLV
ECLGND
External V
Received Data from PMD Receiver
125 MHz Clock from Receiver PLL
Transmit Data from PHY PMRD
125 MHz Clock from PHY
Scrambled Data to PMD Transmitter
Descrambled Data to PHY
Realigned 125 MHz Clock to PHY
Encode 0
Encode 1
Clock Detect Input from Receive PLL
Signal Detect Input from PMD Receiver
CC
TL F 11885 – 4
TABLE I Pinout Summary
CC
CC
Description
5
V
GND (1 4 11 15)
ECLV
ECLGND (22)
EXTV
RXD
RXC
CC
(7 16 28)
g
g
CC
CC
(3 2)
(5 6)
(21)
(23)
Positive power supply for all internal
CMOS circuitry The Stream Cipher
Scrambler Descrambler operates from
a single
Return path for internal CMOS circuitry
power supply
Positive power supply for all internal
ECL circuitry This power supply is in-
tentionally separated from others to re-
duce coupled supply noise
Return path for all internal ECL circuit-
ry This Power supply return is inten-
tionally separated from others to re-
duce coupled supply noise
Positive power supply for emitter fol-
lower output circuitry
Differential 100K ECL data inputs
These inputs receive the ECL signals
generated by the National Semicon-
ductor DP83231 Clock Recovery De-
vice (CRD
Enhanced Physical Layer Devices
(PLAYER
Differential 100K ECL clock inputs
These inputs receive the 125 MHz
clock regenerated by the National
Semiconductor DP83231 Clock Re-
covery Device (CRD) the DP83257VF
or
Physical Layer Devices (PLAYER
the
a
Supply
Supply Return
Supply
Supply Return
Supply
Diff 100K ECL In
Diff 100K ECL In
Diff 100K ECL In
Diff 100K ECL In
Diff ECL Out
Diff ECL Out
Diff ECL Out
TTL Compatible CMOS In
TTL Compatible CMOS In
TTL Compatible CMOS In
Single-Ended ECL ln
a
TM
DP83256VF-AP
5V DC power supply
TM
) or the DP83256 7VF-AP
)
Type
Enhanced
a
)