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| 型號(hào)： | T7121-PL2 |
| 英文描述： | T7121 HDLC Interface for ISDN |
| 中文描述： | T7121的HDLC接口用于ISDN |
| 文件頁(yè)數(shù)： | 45/68頁(yè) |
| 文件大小： | 685K |
| 代理商： | T7121-PL2 |
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Lucent Technologies Inc.
45
Data Sheet
April 1997
T7121 HDLC Interface for ISDN (HIFI-64)
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-
lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess
of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for extended
periods can adversely affect device reliability.
Electrical Characteristics
T
A
= 0
°
C to 70
°
C, or –40
°
C to +85
°
C (see Ordering Information). V
DD
= 5 V
±
5%, V
SS
= 0 V, 100 pF each output.
Parameter
Symbol
V
DD
V
I
T
stg
Min
—
Max
7
Unit
V
V
°
C
dc Supply Voltage Relative to V
SS
Input Voltage Range
Storage Temperature Range
V
SS
– 0.5
–40
V
DD
+ 0.5
125
Parameter
Symbol
I
DD
Test Conditions
T
A
= 70
°
C
Min
—
Max
15
Unit
mA
Supply Current
Input Leakage Current:
High Level (logic 1)
Low Level (logic 0)
Low Level (logic 0)
Input Leakage Current
Bidirectional Pins:
High Level (logic 1)
Low Level (logic 0)
Output 3-state
Leakage Current:
High Level (logic 1)
Low Level (logic 0)
Input Voltage:
High Level (logic 1)
Low Level (logic 0)
Output Voltage:
High Level (logic 1)
High Level (CMOS 1)
Low Level (logic 0)
Power Dissipation
(nominal 30 mW)
I
IH
I
IL
I
LA
V
IH
= 5.25 V
V
IL
= 0 V (except A3—A0)
V
IL
= 0, A3—A0
—
—
—
–7.5
7.5
60
A
μ
A
μ
A
I
IH
I
IL
V
IH
= 5.25 V
V
IL
= 0 V
—
—
–37.5
37.5
μ
A
μ
A
I
OZH
I
OZL
V
OH
= 5.25 V
V
OL
= 0 V
—
—
–30
30
μ
A
μ
A
V
IH
V
IL
—
—
2.0
—
—
0.8
—
V
V
OH
V
OHC
V
OL
PD
I
OH
= –2.4 mA
I
OHC
= –0.24 mA
I
OL
= 2.4 mA
CLK = 12 MHz,
CLKX = CLKR = 4.096 MHz
T
A
= 70
°
C
T
A
= 0
°
C
T
A
= –40
°
C
CLK = 12 MHz,
CLKX = CLKR = 4.096 MHz
—
—
2.4
3.5
—
—
—
0.4
V
V
V
—
—
—
—
80
105
120
15
mW
mW
mW
mW
Powerdown Mode
(nominal 5 mW)
Input Capacitance
Output Capacitance
PD
Ci
Co
—
—
4
5
pF
pF
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