參數(shù)資料
型號(hào)： T7264
廠商： Lineage Power
英文描述： U-Interface 2B1Q Transceiver(U接口 2B1Q收發(fā)器)
中文描述： U型接口2B1Q收發(fā)器（ü接口2B1Q收發(fā)器）
文件頁(yè)數(shù)： 36/54頁(yè)
文件大?。?/td> 876K
代理商： T7264
36
Lucent Technologies Inc.
Data Sheet
April 1998
T7264 U-Interface 2B1Q Transceiver
Electrical Characteristics
(continued)
Table 27. Internal PLL Characteristics
* Set by digital PLL; therefore, variations track MTC (LT mode) or U-interface line rate (NT mode).
Table 28. Digital dc Characteristics (Over Operating Ranges)
Loop-Range Performance Characteristics
The T7264 transceiver is designed to allow systems to meet the loop-range requirements of ANSI Standard T1.601-
1992 when the transceiver is used with the proper peripheral circuitry.
The line driver provides pulses that produce the 2.5 V template required of the T1.601 specification when connected
to the proper transformer and interface circuitry.
Parameter
Test Conditions
—
–3 dB point (LT)
–3 dB point (NT), 18 kft 26 AWG
at 0.15 Hz typical (LT)
at 1.5 Hz typical (NT)
Min
±
250
—
—
—
—
Typ
—
0.45*
5*
0.4*
1.0*
Max
—
—
—
—
—
Unit
ppm
Hz
Hz
dB
dB
Total Pull Range
Jitter Transfer Function
Jitter Peaking
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Input Leakage Current:
Low
High
Low
High
Input Voltage:
Low
High
Low-to-High Threshold
High-to-Low Threshold
Low
High
Output Leakage:
Low
High
Output Leakage:
Low, TTL
I
IL
I
IH
I
ILpu
I
IHpu
V
IL
= 0 (pin 1, 2)
V
IH
= V
DD
(pin 1, 2)
V
IL
= 0 (pins 7—11, 14—15, 24—26)
V
IH
= V
DD
(pins 7—11, 14—15, 24—26)
–10
—
–52
—
—
—
—
—
—
10
–10
10
μ
A
μ
A
μ
A
μ
A
V
IL
V
IH
V
ILs
V
IHs
V
ILc
V
IHc
All Pins Except Pin 7, 10, 11, 24
All Pins Except Pin 7, 10, 11, 24
Pin 7
Pin 7
Pins 10, 11, 24
Pins 10, 11, 24
—
2.0
V
DD
– 0.5
—
—
0.7 V
DD
—
—
—
—
—
—
0.8
—
—
0.5
0.2 V
DD
—
V
V
V
V
V
V
I
OZL
I
OZH
V
OL
= 0; Pin 26 = 0
V
OH
= V
DD;
Pin 26 = 0
10
—
—
—
—
–10
μ
A
μ
A
High, TTL
V
OL
V
OH
I
OL
= 1.6 mA, Pins 3, 4, 5, 16
I
OL
= 3.3 mA, Pin 43
I
OL
= 6.5 mA, Pins 13, 23
I
OH
= 2.4 mA, Pins 3, 4, 5, 16
I
OH
= 5.1 mA, Pin 43
I
OH
= 10.4 mA, Pins 13, 23
—
—
—
2.4
2.4
2.4
—
—
—
—
—
—
0.4
0.4
0.4
—
—
—
V
V
V
V
V
V
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