pdi1394p23 NXP Semiconductors, pdi1394p23 Datasheet - Page 20

• Manufacturer Part Number: pdi1394p23
• Description: 2-port/1-port 400 Mbps Physical Layer Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
17.0 APPLICATION INFORMATION
The IEEE Std 1394–1995 calls for a 250 pF capacitor, which is a non-standard component value. A 220 pF capacitor is recommended.
Use one of these networks per side for all digital power and ground
pins and one per side for all analog power and ground pins. Place
the network as close to the PHY as possible.
2001 Sep 06
2-port/1-port 400 Mbps physical layer interface
Figure 6. Power supply decoupling network
CHASSIS GROUND
OUTER SHIELD TERMINATION
V
0.1 F
DD
COMPLIANT DC-ISOLATED
0.001 F
1 M
PDI1394P23
CABLE PORT
0.01 F
3
6
DGND (AGND)
DV
Figure 4. Twisted pair cable interface connections
Figure 5. Cable outer shield termination methods
DD
(AV
CPS
TPBIAS
TPAn+
TPAn–
TPBn+
TPBn–
DD
220pF
0.1 F
)
SV01805
56
56
OUTER CABLE SHIELD
0.3–1.0 F
390K
56
56
5 k
20
SQUARE WAVE INPUT
VG
VP
Figure 7. Non-isolated connection variations for LPS
POWER PAIR
LINK POWER
CABLE
OUTER SHIELD TERMINATION
CABLE
PAIR A
CABLE
PAIR B
NON-ISOLATED
CHASSIS GROUND
OUTER SHIELD
TERMINATION
OUTER CABLE SHIELD
10 k
10 k
PDI1394P23
SV01748
SV01821
Preliminary data
SV01806
LPS
LPS