MDT57C277 [MDTIC]
MDT75C277;
| 型号： | MDT57C277 |
| 厂家： | 
Micon Design Technology Corporation |
| 描述： | MDT75C277 |
| 文件： | 总5页 (文件大小：201K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
OTP Encoder
深圳市美芯微电子有限公司
地地址址：：深深圳圳市市宝宝安安区区宝宝源源路路名名优优产产品品采采购购中中心心B1B区1区72712室1室
麦肯单片机授权一级代理商
MDT75C277
ÿÿ
电话：0755-36857609/27945551/29491882
MDT75C277
1. General Description
The MDT75C277 is an OTP Encoder using CMOS technology. It has a maximum of
20 bits addressing code providing up to one million codes. It can reduce any code
collision and unauthorized code scanning possibilities.
2. Features
ꢀCMOS technology.
ꢀWide range of Operating Voltage : Vdd = 3.0V ~ 12V.
ꢀUp to 4 data pins.
ꢀTotal 1048576 address codes.
ꢀBuilt-in RC oscillator with single external resistor.
ꢀAvailable in DIP and SOP package.
ꢀAutomatically enter sleep mode if press button over 3 ~ 5 sec
3. Pin Assignment
MDT75C277P / 75C277S
8 pin DIP / SOP
OSCR 1
Vdd 2
Vss 3
8
7
6
5
K3
K2
K1
K0
TXD 4
4. Pin Function Description
Symbol
OSCR
Vdd
Vss
I/O
Function Description
I
Connect a resistor to Vdd to adjust internal RC freq.
Positive power supply 3.0V ~ 12 V.
Ground.
TXD
K0
O
I
Data output pin.
Data input with pull low Resistor.
Data input with pull low Resistor.
Data input with pull low Resistor.
Data input with pull low Resistor.
K1
I
K2
I
K3
I
This specification is subject to be changed without notice. Please visit our web site for the most updated
information. http://www.mdtic.com.tw P.1 2007/5 Ver. 1.1
http://www.mxmcu.com.cn
MDT75C277
OTP Encoder
5.Output Data Reporting
Output data frame
Preamble
C0 ~ C19 ( 1048576 address codes )
D0
D1
D2
D3
Note : 1 Ick = 8 OSC clocks
6. Key 0 ~ 3 combination table
K3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
K2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
K1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
K0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D3
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
D2
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
D1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
This specification is subject to be changed without notice. Please visit our web site for the most updated
2007/5 Ver. 1.1
http://www.mxmcu.com.cn
MDT75C277
OTP Encoder
7. Absolute Maximum Rating
Symbol
Vdd
Vi
Parameter
Conditions
Vdd = 12V
Rating
Unit
V
Supply Voltage
Input Voltage
-0.3 ~ 13
-0.3 ~ Vdd+0.3
-0.3 ~ Vdd+0.3
-40 ~ 125
V
Vo
Output Voltage
Storage Temp.
Operating Temp.
Max. Power dissipation
V
Tst
Top
Pdis
-20 ~ 70
300
mV
8. DC Electrical Characteristics (TA=0℃ to 70℃)
Symbol
Vdd
Parameters
Conditions
Min. Typ.
Max.
Unit
Operating Voltage
Stand by current
3.0
8
12
3.0
1.0
V
Isb
Vdd = 12V, OSC stop
K0 ~ K3 = Low
Output Unloaded
Vdd =12V
1.0
0.5
uA
Iop
Ioh
Iol
Operating current
Source current
Sink Current
mA
mA
mA
Vdd =12V, Voh = 6V
4.5
4.5
Vdd =12V, Vol = 6V
Vdd=11V,
Fop
Operating Freq
80K
HZ
Rext=360K ~ 430K ohm
9. External oscillator resistor selection table ( Reference )
390 K ohm
430 K ohm
470 K ohm
Voltage\Rosc
HZ
current
338µA
260µA
203µA
162µA
117µA
80µA
HZ
current
323µA
252µA
195µA
150µA
113µA
77µA
HZ
current
315µA
248µA
195µA
150µA
113µA
77µA
13 V
12 V
11 V
10 V
9 V
80.8 K
82.5 K
83.8 K
85.6 K
88.4 K
90.9 K
88.9 K
85.1 K
72.7 K
73.8 K
75.0 K
77.4 K
78.7 K
81.4 K
80.7 K
77.4 K
67.8 K
69.0 K
69.9 K
71.7 K
73.7 K
76.5 K
75.5 K
72.7 K
8 V
7 V
50µA
48µA
48µA
6.5 V
38µA
36µA
35µA
This specification is subject to be changed without notice. Please visit our web site for the most updated
2007/5 Ver. 1.1
http://www.mxmcu.com.cn
MDT75C277
OTP Encoder
390 K ohm
HZ current
430 K ohm
HZ current
470 K ohm
Voltage\Rosc
HZ
current
24µA
14µA
11µA
8µA
6 V
5 V
56.7 K
50.3 K
46.4 K
41.2 K
27.4 K
22.2 K
16.6 K
12.7 K
26µA
14µA
11µA
8µA
52.5 K
45.1 K
41.0 K
37.6 K
25.0 K
19.8 K
14.8 K
11.6 K
25µA
14µA
11µA
8µA
49.4 K
42.1 K
39.0 K
35.2 K
23.9 K
19.0 K
14.2 K
11.0 K
4.5 V
4 V
3.3 V
3 V
6µA
6µA
6µA
5µA
5µA
5µA
2.7 V
2.5 V
5µA
5µA
5µA
3µA
3µA
3µA
10. Application circuit ( Reference )
Vdd
R
OSC
SW3
1
2
3
4
8
OSCR
K3
K2
K1
K0
SW2
SW1
SW0
7
6
5
+
VDD
VSS
TXD
4.7u
0.1u
R1
1MΩ
Vss
Transmitter
Circuit
This specification is subject to be changed without notice. Please visit our web site for the most updated
2007/5 Ver. 1.1
http://www.mxmcu.com.cn
MDT75C277
OTP Encoder
(a). If encoder circuit has one switch only to control ON/OFF power & key data together,
then circuit must add R1 resister 1MΩ .
(b). To increase the stability of RC oscillator can add 100 pF capacitor at Rosc in parallel .
(c). To increase the stability of K3 ~ K0 key data can increase pull low resister 100K connect
key and Vss , K3 ~ K0 internal pull low resister is 300K (Vdd=9V),
TXD
This specification is subject to be changed without notice. Please visit our web site for the most updated
2007/5 Ver. 1.1
http://www.mxmcu.com.cn
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