212 Series of Decoders
Pin Description
Internal
Connection
Pin Name I/O
Description
NMOS
TRANSMISSION
GATE
Input pins for address A0~A11 setting
They can be externally set to VDD or VSS.
A0~A11
I
D8~D11
DIN
O
I
CMOS OUT
CMOS IN
Output data pins
Serial data input pin
VT
O
I
CMOS OUT
Valid transmission, active high
OSC1
OSC2
VSS
OSCILLATOR Oscillator input pin
OSCILLATOR Oscillator output pin
O
I
Negative power supply (GND)
Positive power supply
¾
¾
VDD
I
Approximate internal connection circuits
N
M
O
S
C
M
O
S
O
U
T
C
M
O
S
I
N
O
S
C
I
L
L
A
T
O
R
T
R
A
N
S
M
I
S
S
I
O
N
G
A
T
E
E
N
O
S
C
2
O
S
C
1
Absolute Maximum Ratings
Supply Voltage...............................-0.3V to 13V
Input Voltage....................VSS-0.3 to VDD+0.3V
Storage Temperature.................-50°C to 125°C
Operating Temperature ..............-20°C to 75°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-
mum Ratings² may cause substantial damage to the device. Functional operation of this de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
3
July 12, 1999
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
