UM3758 Series
--z= --A m--w-
I’ri-Siate Programmahle Encoder/Decoder
PRELIMINARY
Features 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
m Single-Chip CMOS construction m Single-Chip encoder/decoder selected by jump wire m Wide operating voltage range : VDO = 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
General Description According to the following information, The intern 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.
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, providing 3 = 387,420,489 combinations. Some ICs of this series provide 4 to 8 data bits for controlling.
Pin Configurations
., - ._.
1
UM3758 Series Pin Configurations (Continued)
VDD TX/RX
OUT
RX INP IWDE “SS osc Cl17 F116 I
Fl15
02
~VDD
Ft2
VDD
e3
fl3
TX/RX
Cl4
w
RX INP
635
RS
MODE
Cl6
c16
vss
A8
Cl8
0%
R9
A9
RIO
Cl17
AID
D2
ca16
Fl12
NC
OUT
01s
NC
NC
Absolute Maximum Ratings*
*Comments
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
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 ( TA = 25°C , VDD = 9 Volts , VSS = OV unless otherwise specified) Parameter
Symbol
Operating voltage
VDD
Operating current
lop
-
Schmitt Trigger input level
Vsh Vsl
6 -
-
2
V V
HIGH LOW
Other pins input level
Vih Vil
8.5 0
-
9 0.5
V v
HIGH LOW
Output pin logic level
Voh Vol
8.5 0
9 1
V v
HIGH LOW
DATA output current HIGH level LOW level
lohd lold
9 9
Min.
T YP.
Max.
Unit
12
3.0
1.2
Conditions
V mA
V DD = 12V Voh = 6V Vol = 6V
mA mA
.“.
.-
2
. ...,. ..~., : ..:%.h -
omCl*
x
uNdarcHE NITH DC,TA
RDDRESS
;
“NMfiTCHED RDDRESS WITH DflTI’
Fig. 3 -2 UM3758 Operation Flowchart (without data bit) ~~~
STOP
TRLNS”ITTINC TX/RE
STILL
WITCH
OUT = HIC”
UM3758 Series
CE r=- m-s -----e E m m d v---w =
UM3758 Operation Flowchart (with data bit)
* Note : ForlATCH Type For MOMENTARY Type
~
Keep current data All Data fall to LOW
* Address MISMATCH INCLUDES ” NO SIGNAL IN ‘.
.-.
10
UM3758 Series Application Circuit (without data bit) “DD 0
U
: t 2 i10
U
24
YD0
21
WDE
19
9%
rooKn
UM3758lMA/A#
uM3758180A/AM
120 P F ;
23
,x/Rx OUT
Application Circuits (with data bit) (A) Use Three-Contact Pushbutton Q
“DD
IIODE i00Kn osc 120 PF ;
lOaA/B /AM/BM 23
TX/RX
3 -
0”T
I
Note: ETD 108E - 8-Pin Tri-State DIP switch made by EXCEL CELL ELECTRONIC CO., LTD. IN TAIWAN R.O.C. ETD IlOE - lC-Pin Tri-State DIP switch made by EXCEL CELL ELECTRONIC CO., LTD. IN TAIWAN R.O.C.
,- ._.
11
UM3758 Series
Application Circuits (Continued) (B) Use Normal Two-Contact Pushbutton (6) - 1 Appiication Circuit with Data Bit High to Low
L U
24
DD
21
ODE
19
sc
L1
?-=v-+w
L---IOOKn
1OOKn.
L2
17
0 c
120 PF ;
23
X/RX
22
OUT
