Datasheet.kr   

IZE4428 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 IZE4428
기능 1K-byte EEPROM microcircuit
제조업체 Integral
로고 Integral 로고 


전체 10 페이지

		

No Preview Available !

IZE4428 데이터시트, 핀배열, 회로
IZE4428
1К-byte EEPROM microcircuit with function of protection for
writing and programmable secret code.
Microcircuit IZE4428 is designed to use in intellectual plastic cards. Sphere of application:
medical insurance, excess control systems, member cards, smart cards.
Features:
1024 x 8 - arrangement of EEPROM;
Byte - directed addressing;
Protection of memory writing;
1024 х 1 bit arrangement of memory protection ;
Response for reset;
Minimum 10000 cycles of erasure / writing ;
Information storage time - 5 years ;
Location of contact pads and serial interface in accordance with ISO 7816 standard;
Data in memory can be changed only after introduction of correct 2-byte programmable
secret code (PSC);
Purpose of IC contact pads
CP
Symbol
Function
01 I/O Bidirectional data line (open drain )
02
CLK
clock rate input
03
RST
control input (reset )
04 Vcc supply voltage
05
GND
general
1




IZE4428 pdf, 반도체, 판매, 대치품
IZE4428
td1 setting up time (D/CLK)
td2 delay time (CLK/D)
td3 setting up time (CLK/RST)
td4 setting up time (RST/CLK)
td5 hold-in time (D/CLK)
td6 hold-in time (RST)
tL CLK low level
tH CLK high level
tW writing time (fс=20 kHz)
tE erasure time (fс=20 kHz)
tRE delay time
tR Time of rise front
(I/O, CLK, RST)
tF Time of fall
(I/O, CLK, RST)
4,0
6,0
4,0
4,0
20,0
10,0
10,0
5,0
5,0
9,0
-
-
-
-
-
-
-
-
-
-
-
-
-
1,0
1,0
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
Memory
Memory of microcircuit consists of base memory with the structure of 1024 х 8 bit
EEPROM and protection memory with the structure of 1024 х 1 bit PROM. Every byte of
memory can be protected separately from erasure/writing by the way of programming the
corresponding bit of protection memory. They programm Bit of protection only one time
and it can not be erased.
Also microcircuit has protection with programmable secret code (PSC), which controls
excess to erasure/writing of memory. For this purpose the last three bytes of the base
memory intended for error counter (one byte with the address 1021) and PSC (two byte
with addresses 1022 and 1023).
Without verification of PSC only reading of base memory from the address 0 to address
1021 is possible (storage range of PSC is zero notated) and error counter writing. After
successful verification of PSC all base memory from address 0 to address 1023 is
readable and available for operations of erasure/writing. This state of microcircuit retain to
power supply switch off. After switching on of power supply the PSC verification procedure
should be carried out again.
After eight unsuccessful attempts to verify PSC, error counter blocks irreversibly any
possibility to change contents of memory.
Response for reset
Reset can be supplied at any time during microcircuit operates. After reset during 32-clock
pulses to the line I/O, contents of first 4 bytes of memory are read.
System of commands
4

4페이지










IZE4428 전자부품, 판매, 대치품
IZE4428
RST
CLK
I/O
tRE
tH
Data introduction
td3
td4
Removal of data or
verification of PSC
01
23 0 1
td5
td1`
tL
td2
Stable
data
Figure 3 - Data introduction, removal of data and verification of programmable
secret code
RST
Data
introduction
Programming
CLK
0 1 23 0 1 2
E/W
Active
(internal signal)
I/O S0 S1 D7
99 102
tE
199
tW
202
Figure 4 - programming: erasure and writing
7

7페이지



구       성총 10 페이지
다운로드[ IZE4428.PDF 데이터시트 ]
구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

전력 반도체 판매 ( IGBT, TR 모듈, SCR, 다이오드 모듈 )

휴대전화 : 010-3582-2743


상호 : 아이지 인터내셔날

전화번호 : 051-319-2877, [ 홈페이지 ]



링크공유

링크 :

관련 데이터시트

부품번호상세설명 및 기능제조사
IZE4428

1K-byte EEPROM microcircuit

Integral
Integral

DataSheet.kr    |   2019   |  연락처   |  링크모음   |   검색  |   사이트맵