DP83257VF National Semiconductor, DP83257VF Datasheet - Page 119

• Manufacturer Part Number: DP83257VF
• Description: IC FDDI LAYER CTRLR 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83257VF

• Controller Type: physical layer controller
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-BFQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Interface: -
• Other names: *DP83257VF

7 0 Electrical Characteristics
AC Characteristics for the Clock Interface Signals (Periods and Pulse Widths)
Note 1 This parameter is not tested but is assured by correlation with characterization data
AC Characteristics for Port A Interface and Port B Interface
The following signals are covered PHY Port A (AID AIP AIC ARD ARP ARC) and PHY Port B (BID BIP BIC BRD BRP
BRC)
T2
T9
T10
T25
T26
T27
T28
T27
T28
T29
Symbol
Symbol
T30
T31
T32
T33
T34
T35
LBC Period
LBC Pulse Width High
LBC Pulse Width Low
LSC Pulse Width High
LSC Pulse Width Low
CLK16 Period
CLK16 Pulse Width
CLK16 Period
CLK16 Pulse Width
REF IN Pulse Width High
LBC1 to Indicate Data Changes from
TRI-STATE to Valid Data
LBC1 to Indicate Data Changes from
Active to TRI-STATE
LBC1 to Indicate Data Sustain
LBC1 to Valid Indicate Data
Request Data to LBC1 Setup Time
Request Data to LBC1 Hold Time
Parameter
Parameter
FIGURE 7-9 PHY Port Interface Timing
FIGURE 7-8 Clock Pulse Widths
(Continued)
MODE2 CLKSEL
MODE2 CLKSEL
(Note 1)
MODE2 CLKSEL
MODE2 CLKSEL
(Note 1)
Conditions
119
Conditions
e
e
e
e
0
0
1
1
Min
Min
35
35
12
21
27
11
35
15
9
3
TL F 11708 – 34
Typ
Typ
80
64
32
32
16
TL F 11708 – 35
Max
Max
45
45
19
28
37
21
45
70
70
45
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns