LM1819N National Semiconductor, LM1819N Datasheet - Page 6

• Manufacturer Part Number: LM1819N
• Description: IC AIR CORE MTER DVR(TACH)14DIP
• Manufacturer: National Semiconductor
• Type: Driverr

Specifications of LM1819N

• Number Of Drivers/receivers: 0/1
• Voltage - Supply: 12V
• Mounting Type: Through Hole
• Package / Case: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Protocol: -
• Other names: *LM1819N

Typical Applications
TL H 5263 – 9
FIGURE 5 Typical Pulse-Squaring Circuit for
Automotive Tachometers
TL H 5263 – 11
TL H 5263–10
FIGURE 6 Waveforms Encountered in Automotive
FIGURE 7 Tachometer Charge Pump
Tachometer Circuit
Voltage Driven Meter with Norton Amplifier Buffer
TL H 5263 – 5
Deflection
54 (V
7)R
R
(degrees)
e
b
IN
2
1
0 to 305 deflection is obtained with 7 to 5V input
Full scale deflection is adjusted by trimming R
2
6