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參數(shù)資料
| 型號(hào)： | SCANSTA476TSD |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 電源管理 |
| 英文描述： | Eight Input IEEE 1149.1 Analog Voltage Monitor |
| 中文描述： | 8-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | 5 X 5 MM, 0.8MM HEIGHT, PLASTIC, LLP-16 |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大小： | 502K |
| 代理商： | SCANSTA476TSD |
SCANSTA476 Electrical Characteristics
(Continued)
The following specifications apply for V
DD
= +2.7V to 5.5V, f
TCK
= 20 MHz, unless otherwise noted.
Symbol
Parameter
AC ELECTRICAL CHARACTERISTICS
Conditions
Typical
Limits
Units
F
MAX
Throughput Rate
TCK = 20MHz
1
MSPS
(max)
INPUT TIMING CHARACTERISTICS
t
SET
TDI to TCK (H/L)
t
HOLD
TDI to TCK (H/L)
t
SET
TMS to TCK (H/L)
t
HOLD
TMS to TCK (H/L)
t
W
TCK Pulse Width (H/L)
t
REC
Recovery TIme TRST to TCK
t
W
TRST Pulse Width (L)
F
MAX
TCK
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
2.0
1.5
2.0
2.0
10.0
2.0
2.5
20
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
MHz (min)
Note 2:
Absolute maximum ratings are limiting values, to be applied individually, and beyond which the serviceability of the circuit may be impaired. Functional
operability under any of these conditions is not implied. Exposure to maximum ratings for extended periods may affect device reliability.
Note 3:
Data sheet min/max specification limits are guaranteed by design or statistical analysis.
Note 4:
Except power supply pins.
Note 5:
For valid measurements, the analog V
IN
<
V
REF
≤
V
DD
.
Applications Information
POWER-UP TIMING
The SCANSTA476 typically requires 1 μs to power up ,
either after first applying V
, or after an incomplete conver-
sion shift. To return to normal, one "dummy" conversion must
be fully completed. After this first dummy conversion, the
SCANSTA476 will perform conversions properly.
STARTUP MODE
When the V
supply is first applied, the SCANSTA476
requires one dummy conversion after start-up.
S
www.national.com
4
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