LM2984T/NOPB National Semiconductor, LM2984T/NOPB Datasheet - Page 5

• Manufacturer Part Number: LM2984T/NOPB
• Description: IC CONV MICROPROCESSOR TO220-11
• Manufacturer: National Semiconductor

Specifications of LM2984T/NOPB

• Applications: Converter, Microprocessor
• Voltage - Input: 6 ~ 26 V
• Number Of Outputs: 3
• Voltage - Output: 5V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: TO-220-11 (Bent and Staggered Leads)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM2984T; *LM2984T/NOPB; LM2984T

Computer Monitor/Reset Functions
μP Monitor Reset
Oscillator Pulse Width
Minimum μP Monitor
Input Pulse Width
Reset Fall Time
Reset Rise Time
On/Off Switch Input
Current (Pin 8)
On/Off Switch Input
Threshold Voltage
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating ratings.
Note 3: Thermal resistance without a heatsink for junction-to-case temperature is 3°C/W. Thermal resistance case-to-ambient is 40°C/W.
Note 4: Tested Limits are guaranteed and 100% production tested.
Note 5: Human body model, 100 pF capacitor discharged through a 1500Ω resistor.
Note 6: Internal comparators detect when the main regulator output (V
ΔV
to go high again after a delay set by R
Note 7: This parameter is a measure of how short a pulse can be detected at the μP Monitor Input. This parameter is primarily influenced by the value of C
(See Application Hints Section.)
Note 8: To ensure constant junction temperature, low duty cycle pulse testing is used.
Block Diagram
OUT
High or ΔV
Parameter
OUT
Low, and set the Reset Error Flag low. The Reset Error Flag is held low until V
t
and C
VμP
(RESET
(Note 7)
R
R
V
V
ON
ON
rst
rst
= 10k, V
= 10k, V
t
mon
= 2.4V
= 0.4V
. (see application section).
= 0V
pw
= 2000 C
rst
rst
= 5V, C
= 5V, C
Conditions
mon
rst
rst
)
OUT
≤
≤
10 pF
10 pF
) changes from the measured output voltage (with V
5
OUT
returns to regulation. The Reset Error Flag is then allowed
Typical
0.20
0.60
0.01
1.22
1.22
1.0
1.0
7.5
2
IN
1.00/1.00
1.00/1.50
0.80/0.80
2.00/2.00
(Note 4)
1.3/2.10
= 14V) by the specified amount,
0.7/0.4
25/25
10/10
Limit
1125202
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ms
Units
ms
μA
μA
μs
μs
V
V
μs
max
min
max
max
max
max
max
min
mon
.