WELTREND WT8076N18P1 Datasheet
WT8076
Passive Infrared (PIR) Controller
Version 1.0 25-May-1995
Weltrend Semiconductor, Inc. All Rights Reserved
偉詮電子股份有限公司
1
Weltrend Semiconductor Inc.
新竹市科學工業園區工業東九路 24 號 2 樓
2F, No. 24, Industry E. 9th RD., Science-Based Industrial Park, Hsin-Chu, Taiwan
TEL:886-3-5780241 FAX:886-3-5794278.5770419
eltrend
GENERAL DESCRIPTION
The WT8076 is a PIR controller IC which integrates amplifier, window detector and light control
functions. The light can be controlled by a Relay or Triac with adjustable delay time. A CDS interface is
provided to sense day time and night time. A walk-test fuction helps user while setting up the light set.
The line remote control function can switch the light set between auto mode and always-on mode.
FEATURES
• Adjustable detection range
• Adjustable delay time
• CDS interface to differentiate night time and day time
• Walk-test function
• Line remote control to switch auto mode and always on mode
• Relay or Triac output
• High noise immunity
• Low power consumption ( operating 500uA, standby 130uA, Typ. )
PIN ASSIGNMENT
UOU1
NII1
II1
VREF
GND
TB
TCI
UOU2
NII2
II2
CDS
VDD
ZCD
RELAY
TRIAC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
TB
TCI
TRIAC
RELAY
ZCD
VDD
VREF
II1
NII1
UOU1
UOU2
NII2
II2
CDS
UOU1
NII1
II1
VREF
GND
TB
TCI
UOU2
NII2
II2
CDS
VDD
ZCD
RELAYTRIAC
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
ND
WK
WT8076N16P1 WT8076S16P1 WT8076N18P2
Ordering Information
PART No. PACKAGE
WT8076N16P1 16 Pin P-DIP
WT8076S16P1 16 Pin SOIC
WT8076N18P2 18 Pin P-DIP
WT8076
Passive Infrared (PIR) Controller
Weltrend Semiconductor Inc.
2
eltrend
PIN DESCRIPTION
Pin No.
N16P1 S16P1 N18P1
Name Descriptions
1 13 1 UOU1 Output of the first stage OP amplifier.
2 14 2 NII1 Non-inverting input of the first stage OP amplifier.
3 15 3 II1 Inverting input of the first stage OP amplifier.
4 16 4 VREF Reference voltage output.
5 1 5 GND Ground.
6 2 6 TB Time Base. A RC oscillaror is connected on this pin.
Typical frequency is 30kHz.
7 3 7 --- No connection.
8 4 8 TCI Time control input. A RC oscillator is connected on this
pin. It controls the delay time of the light.
9 5 9 TRIAC Triac control pin. Active low.
10 6 10 RELAY Relay control pin. Active hight.
11 7 11 ZCD Zero-crossing input. It detects the zero-crossing point of
the AC line. The ouput of TRIAC pin is synchronous to this
pin.
* * 12 WKT Walk-Test function enable/disable. Internal pull low. The
walt-test function is disbled when this pin is high level.
* * 13 ND Night and day detection enable/disable. Internal pull low.
The night-and-day detection is disbled when this pin is
high level.
12 8 14 VDD Power supply.
13 9 15 CDS Connect a photo-sensitive resistor to detect night time
and day time. If the input level is lower than 1.2V, it is
day time. If the input level is higher than 1.9V, it is night
time.
14 10 16 II2 Inverting input of the second stage OP amplifier.
15 11 17 NII2 Non-inverting input of the second stage OP amplifier.
16 12 18 UOU2 Output of the second stage OP amplifier.
* WT8076N16P1 and WT8076S16P1 : Walk-Test and Night&Day function is always enabled.
WT8076
Passive Infrared (PIR) Controller
Weltrend Semiconductor Inc.
3
eltrend
BLOCK DIAGRAM
1.25V
1.95V
OSC
OSC
CONTROL
LOGIC
Window
Detector
3.2V
REF.
VOLTAGE
UOU2II2UOU1II1
NII1
VREF
VDD
VDD
VDD
System Clock
WKT
ND
ZCD
RELAY
TRIAC
TB
TCI
CDS
NII2
PIR
CDS
WT8076 Block Diagram
1.6V
WT8076
Pulse Width
Detector
Counter
Loading...