參數(shù)資料
型號(hào)： DSP1629
英文描述： TVS 400W 64V UNIDIRECT SMA
中文描述： DSP1629數(shù)字信號(hào)處理器
文件頁數(shù)： 71/126頁
文件大?。?/td> 1993K
代理商： DSP1629
Data Sheet
March 2000
DSP1629 Digital Signal Processor
Lucent Technologies Inc.
71
9 Electrical Characteristics and Requirements
The following electrical characteristics are preliminary and are subject to change. Electrical characteristics refer to
the behavior of the device under specified conditions. Electrical requirements refer to conditions imposed on the
user for proper operation of the device. The parameters below are valid for the conditions described in Section 8.3,
Recommended Operating Conditions.
Table 61. Electrical Characteristics and Requirements
Parameter
Symbol
Min
Max
Unit
Input Voltage:
Low
High
Input Current (except TMS, TDI):
Low (V
IL
= 0 V, V
DD
= 5.25 V)
High (V
IH
= 5.25 V, V
DD
= 5.25 V)
Input Current (TMS, TDI):
Low (V
IL
= 0 V, V
DD
= 5.25 V)
High (V
IH
= 5.25 V, V
DD
= 5.25 V)
Output Low Voltage:
Low (I
OL
= 2.0 mA)
Low (I
OL
= 50
μ
A)
Output High Voltage:
High (I
OH
= –2.0 mA)
High (I
OH
= –50
μ
A)
Output 3-State Current:
Low (V
DD
= 5.25 V, V
IL
= 0 V)
High (V
DD
= 5.25 V, V
IH
= 5.25 V)
Input Capacitance
V
IL
V
IH
–0.3
0.3 * V
DD
V
DD
+ 0.3
V
V
0.7 * V
DD
I
IL
I
IH
–5
—
—
5
μ
A
μ
A
I
IL
I
IH
–100
—
—
5
μ
A
μ
A
V
OL
V
OL
—
—
0.4
0.2
V
V
V
OH
V
OH
V
DD
– 0.7
V
DD
– 0.2
—
—
V
V
I
OZL
I
OZH
CI
–10
—
—
—
10
5
μ
A
μ
A
pF
Table 62. Electrical Requirements for Mask-Programmable Input Clock Options
Parameter
Symbol
Min
Max
Unit
CKI CMOS Level Input Voltage:
Low
High
Small-signal Peak-to-peak Voltage
(on CKI)
*
Small-signal Input Duty Cycle
Small-signal Input Voltage Range
(pins: CKI, CKI2)
Small-signal Buffer Frequency Range
V
IL
V
IH
Vpp
–0.3
0.7 * V
DD
0.6
0.3 * V
DD
V
DD
+ 0.3
—
V
V
V
*
The small-signal buffer must be used in single-ended mode where an ac waveform (sine or square) is applied to CKI and a dc
voltage approximately equal to the average value of CKI is applied to CKI2, as shown in the figure below. The maximum allowable
ripple on CKI2 is 100 mV.
Duty cycle for a sine wave is defined as the percentage of time during each clock cycle that the voltage on CKI exceeds the voltage
on CKI2.
DCyc
Vin
45
55
%
V
0.2 * V
DD
0.6 * V
DD
fss
—
35
MHz
CKI
CKI2
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