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Datasheet: M1EN (No company)

Cmos Asic Encoder

 

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No company


1/6
2005-06-15
2 STATES ENCODER
2 IC
EN/DECODER
M1EN
MOSDESIGN SEMICONDUCTOR CORP.
GENERAL DESCRIPTION
The M1EN is a CMOS ASIC encoder. It will en-code 12 parallel inputs and serially transmit them to the output when transmits
enable TE depressed. These address inputs are 2 states i.e. LOW (0) or OPEN (1).
FEATURES
·
Same Rosc matched to the Decoder M1D/F.
·
2
12
= 4,096 codes.
·
4 cycles transmission each time.
·
Direct data transmit type(Eliminating TE and diodes).
M1EN-HSwitch to VDD.
APPLICATIONS
·
Car/home alarm system, garage control etc..
BLOCK DIAGRAM
*All specs and applications shown above subject to change without prior notice.
( , )
Oscillator
Control
Input
X
A0
A11
DO
Freq
Divider
Logic unit
Control
Output
Driver
Y
T E


2/6
2005-06-15
2 STATES ENCODER
2 IC
EN/DECODER
M1EN
MOSDESIGN SEMICONDUCTOR CORP.
ABSOLUTE MAXIMUM RATINGS
(TA=25)
Parameter
Rating
Unit
Supply Voltage
-0.3 to 12
V
Input Voltage
-0.2~V
DD
+0.2
V
Operating Temperature
0 to 70
Storage Temperature
-50 to 125

ELECTRICAL CHARACTERISTICS
Characteristics
Sym.
Min.
Typ.
Max.
Unit
Conditions
Operating Voltage
V
DD
2.4
12
V
Operating Current
I
OP
0.1
1
mA
No load
Quiescent Current
I
SB
0.1
0.5
A
Output Drive Current
I
O
2
mA
@V
DS
=1.2V
V
IH
V
DD
­0.2
V
DD
V
DD
Input Voltage
V
IL
V
SS
V
SS
V
SS
+0.2
V
Oscillator Frequency
Fosc
76
KHz
External±30%, Rosc=
220
K


PIN DESCRIPTION
No.
Name
Description
1~8
A0~A7
Address inputs
9
VSS
Negative power supply
10~13
A8~A11
Address inputs
14
TE
Transmit enable
15
Y
Oscillator output
16
X
Oscillator input
17
DO
Data output
18
VDD
Positive power supply

M1EN
A0
VDD
DO
VSS
1
18
9
10
A1
A2
A3
A4
A5
A6
A7
X
Y
A11
A10
A9
A8
TE


3/6
2005-06-15
2 STATES ENCODER
2 IC
EN/DECODER
M1EN
MOSDESIGN SEMICONDUCTOR CORP.
TIMING WAVEFORM
(1) BIT FORMAT






(2) TIMING DIAGRAM









"0"
"OPEN"
1
2
32
33
64
65
96
OSC
32 CLOCKS
64 CLOCKS
64 CLOCKS
32 CLOCKS
DO
1st WORD
4th WORD
12 BITS
SYNC
A0
A11
A0
A11
SYNC
T E
2
7
12
17
0
50
100
150
200
250
VDD ( Volt )
Freq (KHz)
75K
82K
91K
100K
120K
150K
180K
200K
220K
270K
360K
M1EN F-V curve


4/6
2005-06-15
2 STATES ENCODER
2 IC
EN/DECODER
M1EN
MOSDESIGN SEMICONDUCTOR CORP.
OPERATING FLOWCHART


Power ON
Stand-by
TEB
depressed?
4 words data
transmitted
TEB still
depressed?
Y
N
N


5/6
2005-06-15
2 STATES ENCODER
2 IC
EN/DECODER
M1EN
MOSDESIGN SEMICONDUCTOR CORP.
RECONNENDED OSCILLATOR PARAMETERS
Rosc (K)
M1EN/D/F (KHz)
75
218
82
199
91
185
100
170
120
142
150
115
180
95
200
86
220
78
270
63
300
57
330
51
360
49







DATA OUTPUT
M1EN
(D0~D3)
M1D/F
(D0~D3)
0 (VSS)
1 (VDD)
1 (OPEN)
0 (VSS)
0
50
100
150
200
250
300
350
400
0
50
100
150
200
250
Rosc ( KŮ )
Freq ( KHz )
Freq-Rosc chart
(@VDD=12V)
M1EN/D/F
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