UM3758 Datasheet, PDF (4/18 Pages) UMC Corporation – TRi-STATE ProgrammaBle Encoder/Decoder

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Pin Descriptions (Continued)
Pin Number
UM3758 UM3758 UM3758
-18OA -12OA -120AM
/AM
12
9
9
Designation
Al2
10
NC
11
NC
13
--
Al3
14
-
Al4
15
10
12
Al5
16
11
13
Al6
17
12
14
Al7
16
--
Al8
19
13
15
osc
20
14
16
21
15
17
vss
MODE
22
16
18
RXINP
23
17
19
TX/RX OUT
24
18
20
VDD
Description
Address select line 12 is tri-state indicated as 0, 1
and open
No connection
Noconnection
Address select line 13 is tri-state indicated as 0, 1
and open
Address select line 14 is tri-state indicated as 0, 1
and open
Address select line 15 is tri-state indicated as 0, 1
and open
Address select line 16 is tri-state indicated as 0, 1
and open
Address select line 17 is tri-state indicated as 0, 1
and open
Address select line 16 is tri-state indicated as 0, 1
and open
R.C. input pin for Single pin oscillator. A resistor is
connected from this pin to VDO and a capacitor to Vss
The ground pin for UM3756
This pin is used to select transmit or receive mode
MODE - VDO : Encoder mode
MODE - Vss : Decoder mode
‘*’
Receiver input pin. Receives waveform from the detect
circuit
In encoder mode, this pin will transmit waveform; in
decoder mode, this pin will switch to LOW if comparison
is OK
The positive power supply of UM3756
.-.
4