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PRELIMINARY
UM3758 Series
I’ri-Siate Programmahle Encoder/Decoder
Features
m Single-Chip CMOS construction
m Single-Chip encoder/decoder selected by jump wire
m Wide operating voltage range : V
DO
= 3 to 12 Volts
. Built-in RC oscillator (tan use 5 % resistor)
n
E a s y interface with RF, Infrared(lR) and Ultrasonic
transmission media
n
Tri-state(0, 1, open) address codes, some of address
codes used as data Codes or as internal addresses
by mask Option
m Internal address code is lSbii, ie 3 ‘5 387,428, 489
different ccdes at most
m Decoder has 8-bit latch data
m Series 1C for various applications
n
UM3758120A pin outcompatibleto UM3750
General Description
The UM3758 series are Single-Chip programmable encoder
/decoder ICs fabricated i n C M O S s t r u c t u r e f o r l o w
power consun$ion: They are enhanced for new Stage
encoder/decoder ICs to provide many more combinations
for higher security.
Most fzmbinations are achieved by UM3758-18OA, provid-
ing 3 = 387,420,489 combinations. Some ICs of this
series provide 4 to 8 data bits for controlling.
According to the following information, The inter-
n a l a d d r e s s b i i s , 1 8 bis/24pin and 12 biis/lEpin
package, tan be assigned by customer in advance
for much higher securii and confidentialii. Whenever
t h e a d d r e s s Codes of transmitter t r a n s m i t s , t h e
receiver will check the address codes with his own and
the successive two matched address codes will generate
a low pulse. If there were any data bits, the receiver
will latch these data bis at the corresponding pins
for controlling.
Pin Configurations
., - ._.
1
UM3758 Series
Pin Configurations (Continued)
VDD
TX/RX
RX INP
IWDE
“SS
osc
Cl17
F116
Fl15
I
OUT
02
e3
Cl4
635
Cl6
A8
R9
RIO
D2
NC
~VDD
Ft2
fl3
w
RS
c16
Cl8
A9
AID
Fl12
NC
VDD
TX/RX
RX INP
MODE
vss
0%
Cl17
ca16
01s
NC
OUT
Absolute Maximum Ratings*
Power Supply Voltage . . . . . . . . . .-0.3V to 11V
Operating Temperature . . . . . . . . .-20C to 70%
Storage Temperature (Tstg) . . . . .
55°C to 150°C
Apply Voltage on any Pin . . . . . . . . . . . . . .
VSS - 0.3 < VIN < VOD + 0.3
*Comments
Stresses above those listed under “Absolute Maximum
Ratings’ may cause permanent darnage to the device.
These are stress ratings only. Functional Operation of
this device at these or any other conditions above
those indicated in the operational sections of this
specification is not implied and exposure to absolute
DC Electrical Characteristics
( T
A
= 25°C , VDD = 9 Volts , VSS = OV unless otherwise specified)
Parameter
Operating voltage
Operating current
Schmitt Trigger input
level
Other pins input
level
Output pin logic
level
DATA output current
HIGH level
LOW level
.“.
Symbol
VDD
Min.
3.0
-
6
-
8.5
0
8.5
0
9
9
T
YP
.
Max.
12
1.2
Unit
V
mA
V
V
V
v
V
v
mA
mA
Conditions
lop
Vsh
Vsl
Vih
Vil
Voh
Vol
lohd
lold
-
-
-
2
9
0.5
9
1
HIGH
LOW
HIGH
LOW
HIGH
LOW
V
DD
= 12V
Voh = 6V
Vol = 6V
.-
._.
2
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UM3758 S e r i e s
DC Electrical Characteristics (Continued)
Parameter
TX/RX OUTputcurrent
HIGH level
LOW level
Operating frequency
Symbol
Min.
TYP.
Max.
Unit
,
Conditions
VOD = 12V
Voh = 6V
Vol = 6V
+ 15% exclusive
of external part
loht
IOR
35
15
‘-
160
mA
mA
KHz
F
Pin Descriptions
1. UM3758-1 SOA/AM, UM37584 20A and UM3758-120AM
Pin Number
UM3758 UM3758
-18OA
-120A
/AM
1
Al
Address select line 1 is tri-state indicated as 0, 1
and open
Address select line 2 is tri-state indicated as 0, 1
and open
Address select line 3 is tri-state indicated as 0, 1
and open
Address select line 4 is tri-state indicated as 0, 1
and open
Address select line 5 is tri-state indicated as 0, 1
and open
Address select line 6 is tri-state indicated as 0, 1
and open
Address select line 7 is tri-state indicated as 0, 1
and open
Address select line 8 is tri-state indicated as 0, 1
and open
Address select line 9 is tri-state indicated as 0, 1
open
Address select line 10 is tri-state indicated as 0, 1
open
Address select line 11 is tri-state indicated as 0, 1
open
-L
,.
UM3758
-120AM
Designation
Descripti.on
2
1
1
A2
3
2
2
A3
4
3
3
A4
5
4
4
A5
6
5
5
A6
7
A7
8
6
6
A8
9
7
7 1 Ag 1
and
10
8
8 1 A10 1
and
11
-
- 1 A1’ /
and
-_
3
== ==-
-SV ---
------
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g
aD
U M 3 7 5 8 Wies
Pin Descriptions (Continued)
Pin Number
UM3758 UM3758 UM3758
-12OA
-120AM
-18OA
/AM
12
9
9
Al2
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
Designation
Description
10
11
13
-
-
NC
NC
Al3
14
-
Al4
15
10
12
Al5
16
11
13
Al6
17
12
14
Al7
16
-
-
Al8
19
13
15
osc
20
21
14
15
16
17
vss
MODE
22
16
18
RXINP
23
17
19
TX/RX OUT
24
18
20
VDD
.-.
4
UM3758 Series
2. UM3758=108A/B/AM/BM, UM3758-084A/B and UM3758-084AM/BM
iM3756 ‘~~ a
D e s i g n
108A/B
t
i
o
n
Description
hM/SM
1
- I - l A’
Address select line 1 is tri-state indicated as 0, 1
and open
Address select line 2 is tri-state indicated as 0, 1
and open
Address select line 3 is tri-state indicated as 0, 1
and open
Address select line 4 is tri-state indicated as 0, 1
and open
5
Address select line 5 is tri-state indicated as 0, 1
and open
A d d r e s s select line 6 is triistate indicated as 0, 1
and open
Address select line 7 is tri-state indicated as 0, 1
and open
Address select line 8 is tri-state indicated as 0, 1
and open
A d d r e s s <select line 9 is tri-state indicated as 0, 1
and open
6
7
a
9
10
a
8
1
Al0
Address select line 10 is tri-state indicated as 0,l
and open
Data output pin 1, states are either HIGH (1 or open)
or LOW (0)
Data output pin 2, states are either HIGH (1 or open)
or LOW (0)
11
Dl
12
9
9
Di
.-
5
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