LS7538, LS7538-S, LS7539 Selling Leads, Datasheet
MFG:DIP-8P Package Cooled:LSI D/C:03+
LS7538, LS7538-S, LS7539 Datasheet download
Part Number: LS7538
MFG: DIP-8P
Package Cooled: LSI
D/C: 03+
LS7538, LS7538-S, LS7539
- Table of contents:
Info of LS7538
Info of LS7538-S
Info of LS7539
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About LS7538
PDF/DataSheet Download
Datasheet: LS7538
File Size: 27206 KB
Manufacturer: LSI [LSI Computer Systems]
Download : Click here to Download
About LS7030
PDF/DataSheet Download
Datasheet: LS7030
File Size: 68055 KB
Manufacturer: LSI [LSI Computer Systems]
Download : Click here to Download
About LS7539
PDF/DataSheet Download
Datasheet: LS7539
File Size: 27206 KB
Manufacturer: LSI [LSI Computer Systems]
Download : Click here to Download
LS7538 General Description
The LS7538 and LS7539 are CMOS integrated circuits which provide trigger pulses for triac phase control of incandescent lamps.
The circuits are designed to operate with a wide variety of lamp sizes ranging from small table lamps to large floor lamps.
The AGC Loop automatically adjusts Touch Sensitivity to be independent of lamp size.
There are 3 different Brightness Step Sequences for each version of the IC which can be selected by the Three-State
MODE pin as shown in Table 1.
The circuits are designed to operate with a wide variety of lamp sizes ranging from small table lamps to large floor lamps.
The AGC Loop automatically adjusts Touch Sensitivity to be independent of lamp size.
There are 3 different Brightness Step Sequences for each version of the IC which can be selected by the Three-State
MODE pin as shown in Table 1.
LS7538 Maximum Ratings
| PARAMETER |
SYMBOL |
VALUE |
UNITS |
| DC Supply Voltage |
Vdd-VSS |
+11 |
V |
| Voltage at any input |
VIN |
VSS -0.5 to Vdd + 0.5 |
V |
| Operating temperature |
TA |
-20 to +85 |
°C |
| Storage temperature |
TSTG |
-65 to +150 |
°C |
LS7538 Features
• Touch Sensitivity guaranteed to 600pF Touch Plate Capacitance.
• Touch Operation independent of line plug polarity.
• Pin selection of three available Brightness Step Sequences.
• Minimal external components.
• AGC Loop stabilizes immediately after Power-Up.
• Brightness state is Off after AC power applied.
• Brightness state is unchanged if AC power interrupted for < 0.5 sec.
• Advanced CMOS design for reliable operating characteristics and low power.
• 50/60 Hz Line Frequency.
• +6V to +9.5V Operation (VDD-VSS).
• LS7538, LS7539 (DIP); LS7538-S, LS7539-S (SOIC) - See Figure 1
• Touch Operation independent of line plug polarity.
• Pin selection of three available Brightness Step Sequences.
• Minimal external components.
• AGC Loop stabilizes immediately after Power-Up.
• Brightness state is Off after AC power applied.
• Brightness state is unchanged if AC power interrupted for < 0.5 sec.
• Advanced CMOS design for reliable operating characteristics and low power.
• 50/60 Hz Line Frequency.
• +6V to +9.5V Operation (VDD-VSS).
• LS7538, LS7539 (DIP); LS7538-S, LS7539-S (SOIC) - See Figure 1
LS7538 Typical Application
• Screw-in and built-in adapter modules for converting table and floor lamps to touch control for step dimming.
• On-Off touch control of under-cabinet fluorescent lamps (LS7539 only).
• On-Off touch control of under-cabinet fluorescent lamps (LS7539 only).
LS7538 Connection Diagram
LS7539 General Description
The LS7538 and LS7539 are CMOS integrated circuits which provide trigger pulses for triac phase control of incandescent lamps.
The circuits are designed to operate with a wide variety of lamp sizes ranging from small table lamps to large floor lamps.
The AGC Loop automatically adjusts Touch Sensitivity to be independent of lamp size.
There are 3 different Brightness Step Sequences for each version of the IC which can be selected by the Three-State
MODE pin as shown in Table 1.
The circuits are designed to operate with a wide variety of lamp sizes ranging from small table lamps to large floor lamps.
The AGC Loop automatically adjusts Touch Sensitivity to be independent of lamp size.
There are 3 different Brightness Step Sequences for each version of the IC which can be selected by the Three-State
MODE pin as shown in Table 1.
LS7539 Maximum Ratings
| PARAMETER |
SYMBOL |
VALUE |
UNITS |
| DC Supply Voltage |
Vdd-VSS |
+11 |
V |
| Voltage at any input |
VIN |
VSS -0.5 to Vdd + 0.5 |
V |
| Operating temperature |
TA |
-20 to +85 |
°C |
| Storage temperature |
TSTG |
-65 to +150 |
°C |
LS7539 Features
• Touch Sensitivity guaranteed to 600pF Touch Plate Capacitance.
• Touch Operation independent of line plug polarity.
• Pin selection of three available Brightness Step Sequences.
• Minimal external components.
• AGC Loop stabilizes immediately after Power-Up.
• Brightness state is Off after AC power applied.
• Brightness state is unchanged if AC power interrupted for < 0.5 sec.
• Advanced CMOS design for reliable operating characteristics and low power.
• 50/60 Hz Line Frequency.
• +6V to +9.5V Operation (VDD-VSS).
• LS7538, LS7539 (DIP); LS7538-S, LS7539-S (SOIC) - See Figure 1
• Touch Operation independent of line plug polarity.
• Pin selection of three available Brightness Step Sequences.
• Minimal external components.
• AGC Loop stabilizes immediately after Power-Up.
• Brightness state is Off after AC power applied.
• Brightness state is unchanged if AC power interrupted for < 0.5 sec.
• Advanced CMOS design for reliable operating characteristics and low power.
• 50/60 Hz Line Frequency.
• +6V to +9.5V Operation (VDD-VSS).
• LS7538, LS7539 (DIP); LS7538-S, LS7539-S (SOIC) - See Figure 1
LS7539 Typical Application
• Screw-in and built-in adapter modules for converting table and floor lamps to touch control for step dimming.
• On-Off touch control of under-cabinet fluorescent lamps (LS7539 only).
• On-Off touch control of under-cabinet fluorescent lamps (LS7539 only).
LS7539 Connection Diagram
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