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參數(shù)資料
| 型號(hào)： | LM79CCVFX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, PLASTIC, QFP-44 |
| 文件頁數(shù)： | 2/31頁 |
| 文件大?。?/td> | 469K |
| 代理商： | LM79CCVFX |
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AC Electrical Characteristics (Note 13) The following specifications apply for +4.25 V
DC ≤ VCC ≤
+5.75 VDC unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ =
25C. (Continued)
Note 8: Typicals are at TJ=TA=25C and represent most likely parametric norm.
Note 9: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 10: TUE (Total Unadjusted Error) includes Offset, Gain and Linearity errors of the ADC and any error introduced by the amplifiers as shown in the circuit of
Figure 13 .
Note 11: Total Monitoring Cycle Time includes temperature conversion, 7 analog input voltage conversions and 3 tachometer readings. Each temperature and input
voltage conversion takes 100 ms typical and 112 ms maximum. Fan tachometer readings take 20 ms typical, at 4400 rpm, and 200 ms max.
Note 12: The total fan count is based on 2 pulses per revolution of the fan tachometer output.
Note 13: Timing specifications are tested at the TTL logic levels, VIL=0.4V for a falling edge and VIH=2.4V for a rising edge. TRI-STATE output voltage is forced
to 1.4V.
DS100036-7
An x indicates that the diode exists.
Pin Name
D1
D2
D3
IORD
x
IOWR
x
SYSCLK
x
D0–D7
xxx
SMI__IN
x
Chassis Intrusion
x
Power Switch
Bypass
xx
Pin Name
D1
D2
D3
FAN1–FAN3
x
SCL
x
SDA
x
RESET
xx
VID4/NTEST
x
Pin Name
D1
D2
D3
IN6
x
FB6
x
FB5
x
IN5
x
IN4–IN0
x
VID3–VID0
x
Pin Name
D1
D2
D3
BTI
xx
NMI/IRQ
xxx
SMI
xx
A0–A2
x
CS
x
FIGURE 4. ESD Protection Input Structure
LM79
www.national.com
10
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