NWK914D
NWK914D
PHY/PMD High Speed Copper Media Transceiver
Preliminary Information
DS4829 - 1.1 December 1997
The NWK914D is a Physical Layer device designed for
use in 100BASE-TX applications. The NWK914D has
integrated the 100mb/s transceiver, clock and data recovery
and NRZI conversion circuitry. It is designed for use in cost
effective NIC adapter cards and 100BASE-TX repeater and
switch applications.
The device connects through a 5 bit symbol interface
directly with any MAC controller that includes the PCS layer,
resulting in a simple and cost effective solution. It will also
interface with a PCS device such as the NWK935 to form a
complete 100BASE-TX Physical Layer for connection to the
IEEE 802.3 standard MII interface.
RDAT4
RDAT3
RDAT2
RDAT1
RDAT0
TXC
TTLV
CC
REFCLK
TDAT0
TDAT1
TDAT2
TDAT3
52
51
50
49
48
47
46
45
44
43
42
41
40
TDAT4
TTLGND
N/C
N/C
RXC
SDT
RDLV
CC
N/C
N/C
RXPLLGND
LFRB
LFRA
RXPLLV
CC
RXV
CC
FEATURES
s
Compatible with IEEE-802.3 Standards
s
Operates over 100 Meters of STP and Category 5
UTP cable
s
Five Bit TTL Level Symbol Interface
s
Integrated Clock and Data Recovery
s
Supports Full-duplex Operation
s
Integral 10 Mb/s Buffer for Dual 10 Mb/s & 100 Mb/s
Applications
s
Adaptive Equalization
s
25MHz to 125MHz Transmit Clock Multiplier
s
Programmable TX Output Current
s
Base Line Wander Correction
1
2
3
4
5
6
7
8
9
10
11
12
13
39
38
37
36
35
34
33
32
31
30
29
28
27
TTLGND
TEST
TESTIP
N10/100
LBEN
TDLV
CC
TXOE
TXPLLV
CC
LFTA
LFTB
TXPLLGND
BGAPGND
SUBGND
RXGND
RXIP
RXIN
RXV
CC
1
EQSEL
10TXIN
10TXIP
TXV
CC
TXON
TXOP
TXGND
TXREF
BGAPV
CC
14
15
16
17
18
19
20
21
22
23
24
25
26
GP52
Fig.1 Pin connections - top view
s
Single +5V supply
s
52 Pin PQFP package
ORDERING INFORMATION
NWK914D/CG/GP1N
MAC or
Repeater
Controller
IC
MII
Interface
Symbol
Interface
NWK935
100 PCS
NWK914D
Isolation
Magnetics
RJ-45
Fig.2 Simplified system diagram
1
MITEL [ MITEL NETWORKS CORPORATION ]
