NTE1509 NTE ELECTRONICS, NTE1509 Datasheet

Replacement Semiconductors DIP-18 DOT/BAR DRVR

NTE1509

Manufacturer Part Number
NTE1509
Description
Replacement Semiconductors DIP-18 DOT/BAR DRVR
Manufacturer
NTE ELECTRONICS
Datasheet

Specifications of NTE1509

Led Driver Application
Average Or Peak Level Indicators, Power Meters
No. Of Outputs
10
Output Current
30mA
Output Voltage
1.34V
Input Voltage
3V To 25V
Dimming Control Type
Analog
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Description:
The NTE1509 is a monolithic integrated circuit in an 18–Lead DIP type package that senses analog
voltage levels and drives 10 LEDs, LCDs, or vacuum fluorescent displays, providing a logarithmic 3dB
analog display. A single pin changes the display from a bar graph to a moving dot display. LED current
is regulated and programmable, eliminating the need for current limiting resistors. The whole display
system can operate from a single supply as low as 3V or as high as 25V
The circuit contains its own adjustable reference and accurate 10–step voltage divider. The high im-
pedance input buffer accepts signals down to GND and up to within 1.5V of the positive supply. Fur-
ther, it needs no protection against inputs of 35V. The input buffer drives 10 individual comparators
referenced to the precision divider. Accuracy is typically better than 1dB.
The NTE1509’s 3dB/step display is suited for signals with wide dynamic range, such as audio level,
power, light intensity, or vibration. Audio applications include average or peak level indicators, power
meters, and RF signal strength meters. Replacing conventional meters with an LED bar graph results
in a faster responding, more rugged display with high visibility that retains the ease of interpretation
of an analog display.
The NTE1509 is extremely easy to apply. A 1.2V full–scale meter requires only 1 resistor in addition
to the 10 display LEDs. One more resistor programs the full–scale anywhere from 1.2V to 12V inde-
pendent of supply voltage. LED brightness is easily controlled with a single pot.
The NTE1509 is very versitile. The outputs can drive LCDs, vacuum fluorescents, and incandescent
bulbs as well as LEDs of any color. Multiple devices can be cascaded for a dot or bar mode display
with a range of 60 or 90dB. NTE1509s can also be cascaded with NTE1508s for a linear/log display
or with NTE1549s for an extended–range VU meter.
Features:
D 3dB/Step, 30dB Range
D Drives LEDs, LCDs or vacuum fluorescents
D Bar or dot display mode externally selectable
D Expandable to displays of 90dB
D Internal voltage reference from 1.2V to 12V
D Operates with single supply of 3V to 25V
D Inputs operate down to GND
by user
10–Step Dot/Bar Display Driver
for Logarithmic Scale
Integrated Circuit
NTE1509
D Output current programmable from 1 to 30mA
D Input withstands 35V without damage or false
D Outputs are current regulated, open–collectors
D Directly Drives TTL or CMOS
D The internal 10–step divider is floating and can
outputs
be referenced to a wide range of voltages

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NTE1509 Summary of contents

Page 1

... The NTE1509 is very versitile. The outputs can drive LCDs, vacuum fluorescents, and incandescent bulbs as well as LEDs of any color. Multiple devices can be cascaded for a dot or bar mode display with a range 90dB. NTE1509s can also be cascaded with NTE1508s for a linear/log display or with NTE1549s for an extended–range VU meter. ...

Page 2

... Storage Temperature Range Lead Temperature (During soldering, 10sec) Note 1. The maximum junction temperature of the NTE1509 is +100 C. Device must be derated for operation at elevated temperatures. Junction to ambient thermal resistance is 55 C/W. Note 2. Pin5 input current must be limited to 3mA. The addition of a 39k Pin5 allows 100V signals without damage ...

Page 3

Electrical Characteristics (Cont’d): (Note 2, unless otherwise specified, all specifications apply Parameter Output Drivers LED Current LED Current Difference (Between Largest and Smallest LED Currents) LED Current Regulation Dropout Voltage Saturation Voltage Output Leakage, Each Collector Output Leakage Supply Current ...

Page 4

Pin Connection Diagram LED1 V (–) V (+) Divider Low Signal Input Divider High Reference Output Reference Adjust Mode 18 1 .870 (22.1) Max .100 (2.54) .800 (20. LED2 2 17 LED3 3 16 LED4 4 15 LED5 ...

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