參數(shù)資料
型號(hào)： T7237A
英文描述： Compliance with the New ETSI PSD Requirement
中文描述： 符合新的ETSI PSD的要求
文件頁數(shù)： 78/116頁
文件大?。?/td> 1056K
代理商： T7237A
Data Sheet
January 1998
T7256 Single-Chip NT1 (SCNT1) Transceiver
74
Lucent Technologies Inc.
Electrical Characteristics
All characteristics are for a 15.36 MHz crystal, 135
line load, random 2B+D data, T
A
= –40
°
C to +85
°
C,
V
DD
= 5 V
±
5%, GND = 0 V, and output capacitance = 50 pF.
Power Consumption
Table 35. Power Consumption
Pin Electrical Characteristics
Table 36. Digital dc Characteristics (Over Operating Ranges)
Parameter
Test Conditions
Operating, random data
Powerdown mode
Min
—
—
Typ
270
35
Max
350
50
Unit
mW
mW
Power Consumption
Power Consumption
Parameter
Symbol
Test Conditions
Min
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 Current:
Low
High
Low
High
Low
High
Output Voltage:
Low, TTL
I
ILPU
I
IHPU
I
ILPD
I
IHPD
V
IL
= 0 (pins 2, 6, 7, 11, 44)
V
IH
= V
DD
(pins 2, 6, 7, 11, 44)
V
IL
= 0 (pins 8, 9, 12, 15, 43)
V
IH
= V
DD
(pins 8, 9, 12, 15, 43)
–52
—
–10
–10
–10
–10
—
–52
μ
A
μ
A
μ
A
μ
A
V
IL
V
IH
V
ILS
V
IHS
V
ILC
V
IHC
All pins except 2, 6, 43
All pins except 2, 6, 43
Pin 43
Pin 43
Pins 2, 6
Pins 2, 6
—
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
I
OZLPU
I
OZHPU
I
OZLPD
I
OZHPD
V
OL
= 0, Pin 44 = 0 (pins 3, 14)
V
OH
= V
DD
, Pin 44 = 0 (pins 3, 14)
V
OL
= 0, Pin 44 = 0 (pin 11)
V
OH
= V
DD
, Pin 44 = 0 (pin 11)
V
OL
= 0, Pin 44 = 0 (pins 4, 8, 9, 17)
V
OH
= V
DD
, Pin 44 = 0 (pins 4, 8, 9, 17)
—
–10
–52
—
–10
10
10
—
–10
10
—
52
μ
A
μ
A
μ
A
μ
A
μ
A
μ
A
High, TTL
V
OL
V
OH
I
OL
= 4.5 mA (pin 3)
I
OL
= 19.5 mA (pins 4, 9)
I
OL
= 8.2 mA (pins 8, 17)
I
OL
= 6.5 mA (pin 14)
I
OL
= 3.3 mA (pin 11)
I
OH
= 32.2 mA (pins 4, 9)
I
OH
= 13.5 mA (pins 8, 17)
I
OH
= 10.4 mA (pins 3, 14)
I
OH
= 5.1 mA (pin 11)
—
—
—
—
—
2.4
2.4
2.4
2.4
0.4
0.4
0.4
0.4
0.4
—
—
—
—
V
V
V
V
V
V
V
V
V
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