DP83257VF National Semiconductor, DP83257VF Datasheet - Page 112

• 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
DC Electrical Characteristics for All FDDI Clock Outputs
The following signals are covered Local Byte Clocks (LBC1– LBC5) and Local Symbol Clock (LSC)
These outputs are designed to drive capacitive loads from 20 pF to 60 pF
DC Electrical Characteristics for All Clock Reference Inputs
The following signals are covered Reference In (REF IN) and Feedback In (FBK IN)
DC Electrical Characteristics for Crystal Inputs and Outputs
The following signals are covered Crystal In (XTAL IN) and Crystal Out (XTAL OUT)
Note A This parameter is presented as a typical value to provide enough information to design an appropriate crystal network
DC Electrical Characteristics for All Open Drain Outputs
The following signals are covered Interrupt ( E INT) Acknowledge ( E ACK) and Cascade Ready (CR)
Symbol
I
I
V
Symbol
V
V
V
I
I
OL
OH
Symbol
V
I
IL
IH
OZ
TH
IH
IL
IC
OL
Symbol
V
V
OH
OL
Output Low Current
Output High Current
Small Signal Gain
Input Threshold
Voltage
XTAL IN to
XTAL OUT Delay
Output Impedance
Internal Resistor
Variation
Input High Voltage
Input Low Voltage
Input Clamp Voltage
Input Low Current
Input High Current
Output High Voltage
Output Low Voltage
Output Low Voltage
TRI-STATE Leakage
Parameter
Parameter
Parameter
Parameter
V
(Note A)
V
(Note A)
XTAL IN
Centered about V
(Note A)
(Note A)
(Note A)
(Note A)
(Note A)
(Continued)
I
I
OH
OL
OUT
OUT
I
V
V
IN
Conditions
I
V
Conditions
IN
IN
Conditions
OL
e
Conditions
OUT
e b
e b
e
e
e
e
e
8 mA
1V
V
GND
V
e
400 A
8 mA
18 mA
CC
CC
e
V
112
100 mV
b
CC
1V
TH
V
Min
Min
CC
2 0
Min
b
Min
2
Typ
Typ
Typ
Typ
270
b
2 2
7 0
45
10
4
4
b
Max
b
a
Max
Max
0 5
0 8
0 5
10
Max
1 5
10
10
Units
Units
V
V
Units
Units
mA
mA
k
V
V
V
ns
V
V
A
A
A