HT12A Holtek Semiconductor Inc, HT12A Datasheet - Page 4

• Manufacturer Part Number: HT12A
• Description: Series of Encoders
• Manufacturer: Holtek Semiconductor Inc

Note: D8~D11 are all data input and transmission enable pins of the HT12A.
Approximate internal connections
Absolute Maximum Ratings
Supply Voltage (HT12A) ..............-0.3V to 5.5V
Input Voltage....................V
Operating Temperature...............-20°C to 75°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
Pin Name
TE
OSC1
OSC2
X1
X2
VSS
VDD
mum Ratings² may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged expo-
sure to extreme conditions may affect device reliability.
TE is a transmission enable pin of the HT12E.
I/O
O
O
I
I
I
I
I
OSCILLATOR 1
OSCILLATOR 1
OSCILLATOR 2
OSCILLATOR 2
Connection
CMOS IN
Internal
Pull-high
SS
¾
¾
-0.3 to V
DD
Transmission enable, active low (see Note)
Oscillator input pin
Oscillator output pin
455kHz resonator oscillator input
455kHz resonator oscillator output
Negative power supply, grounds
Positive power supply
+0.3V
4
Supply Voltage (HT12E) ...............-0.3V to 13V
Storage Temperature.................-50°C to 125°C
Description
HT12A/HT12E
April 11, 2000