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PDF NWK914D Data sheet ( Hoja de datos )
| Número de pieza | NWK914D | |
| Descripción | PHY/PMD High Speed Copper Media Transceiver | |
| Fabricantes | Zarlink Semiconductor | |
| Logotipo |  |
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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.
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
TTLGND 1
N/C 2
N/C 3
RXC 4
SDT 5
RDLVCC 6
N/C 7
N/C 8
RXPLLGND 9
LFRB 10
LFRA 11
RXPLLV CC 12
RXVCC 13
39 TTLGND
38 TEST
37 TESTIP
36 N10/100
35 LBEN
34 TDLVCC
33 TXOE
32 TXPLLVCC
31 LFTA
30 LFTB
29 TXPLLGND
28 BGAPGND
27 SUBGND
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
NWK935
100 PCS
Symbol
Interface
NWK914D
Isolation
Magnetics
RJ-45
Fig.2 Simplified system diagram
1
1 page  
NWK914D
AC CHARACTERISTICS
Recommended operating conditions apply except where stated.
Characteristic
Waveform
Timing Min.
Value
Typ.
AC characteristics
100Mb/s TX driver outputs rise/fall times
pins TXOP, TXON
- 2.5
REFCLK frequency
1 - 25
REFCLK tolerance
2 - 100
REFCLK M/S ratio
3 40:60 -
REFCLK to TXC
propagation delay
45 -
TDAT0 → 4 to TXC setup time
5 12 -
TDAT0 → 4 to TXC hold time
60 -
RDAT0 → 4 valid to RXC +Ve edge
7 10 -
RXC to RDAT0 → 4 invalid
8 10 -
RXC M/S ratio
9 45:55 -
REFCLK to SDT transition
5-
Max.
-
-
-
60:40
13
-
-
-
-
55:45
15
Units
ns
MHz
ppm
%
ns
ns
ns
ns
ns
%
ns
NOTE: Conditions for AC Characteristics:
All AC measurementsare made at aVth + 1.5V and with TTL output loaded with 25pf
Conditions
100Ω differential load
measured at RJ45
Tx PLL in lock
REFCLK
4
TXC
TDAT
0→4
VALID
DATA
123
56
VALID
DATA
TXO
bit 4
bit 3
bit 2
bit 1 bit 0
bit 4
Fig.4 Transmit timing waveform
RXC
RDAT
0→4
9
58
VALID
DATA
Fig.5 Receive timing waveform
5
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet NWK914D.PDF ] | |
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