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參數(shù)資料
| 型號： | LS7223 |
| 廠商： | LSI Corporation |
| 英文描述： | KEYPAD PROGRAMMABLE DIGITAL LOCK |
| 中文描述： | 可編程數(shù)字鍵盤鎖 |
| 文件頁數(shù)： | 1/4頁 |
| 文件大?。?/td> | 28K |
| 代理商： | LS7223 |
KEYPAD PROGRAMMABLE DIGITAL LOCK
FEATURES
:
Stand alone lock logic
38416, 4-digit combinations
3 different user programmable codes
Momentary and static lock control outputs
Internal key debounce circuit
Tamper detection output
Status outputs
Low current consumption
+4V to +15V operation (V
DD
-V
SS
)
LS7223 (DIP), LS7223-S (SOIC) - See Figure 1
GENERAL DESCRIPTION:
The LS7223 is a programmable electronic lock implemented
in a monolithic CMOS integrated circuit. The circuit contains
all the necessary memory, decoder and control logic to make
a programmable "keyless" lock system to control electro-
mechanical locks. Input is provided by a matrix keypad whose
maximum allowable size is 4 x 4.
The LS7223 can be programmed to recognize 3 different
codes: one to toggle an output and generate a pulse
(Primary), one to toggle an output (Secondary), and one to
toggle an output and trigger an alarm (Duress). Programming
is done via the keypad inputs. Any entry from the keypad
(when not in the program mode) which does not match one of
the 3 programmed codes causes the Tamper output to
become active.
The monolithic, low power CMOS design of the LS7223
enables it to be designed into typical battery backed-up and
automotive type security systems.
DETAILED DESCRIPTION
:
CODES - There are 3 different function codes which the
LS7223 can store in memory. Each code consists of a 4 digit
number which must be entered in exact sequence and before
the keypad entry enable time expires. The 3 codes and their
functions are explained below.
1. The Primary code, when entered from the keypad, causes
the Lock 1 output to toggle and the Momentary output to
momentarily go high. Whenever power is first applied to
the LS7223, the circuit defaults to the Primary code
corresponding to the keys X1 Y1, X1 Y2, X2 Y2, X2 Y1.
The code can then be altered to any other 4 digit code by
entering the Program mode and keying in the new code.
2. The Secondary code, when entered from the key-
pad, causes the Lock 2 output to toggle. The first 3
digits of the Secondary code must be identical to the
first 3 digits of the Primary code; the 4th digit may or
may not be identical for the two codes. When the
two codes are the same in all 4 digits, the entry of
the code will cause both the Lock 1 and the Lock 2
outputs to toggle. Whenever power is first applied
to the LS7223, the circuit defaults to the Secondary
code corresponding to the keys X1 Y1, X1 Y2, X2
Y2, X1 Y1. The code can then be altered by
entering the Program mode.
3. The Duress code, when entered from the keypad,
causes the Lock 1 output to toggle; at the same time
the Alarm output will latch high to enable an external
alarm. The first 3 digits of the Duress code must be
identical to the first 3 digits of the Primary and
Secondary codes; the 4th digit must be different to
activate the Alarm output. Whenever power is first
applied to the LS7223, the circuit defaults to the
Duress code corresponding to the keys X1 Y1, X1
Y2, X2 Y2, X1 Y2. The code can then be altered
the same way as the other two codes.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
L
CONNECTION DIAGRAM -
TOP VIEW
V
DD
(+V)
CAP-K
LOCK DISPLAY
LOCK 1
LOCK 2
ALARM
TAMPER
CAP-M
PROGRAM
MOM
V
SS
(-V)
RC-OSC
X1
X2
X3
X4
Y1
Y2
Y3
Y4
FIGURE 1
L
December 2002
LSI/CSI
LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
UL
LS7223
7223-121102-1
A3800
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| LS7225 | 制造商:LSI 制造商全稱:LSI 功能描述:DIGITAL LOCK CIRCUIT with Tamper Output |
| LS7226 | 制造商:LSI 制造商全稱:LSI 功能描述:DIGITAL LOCK CIRCUIT with Tamper Output |
| LS7228 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Address Decoder |
| LS7229 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Address Decoder |
| LS7231 | 制造商:LSI 制造商全稱:LSI 功能描述:TOUCH CONTROL LAMP DIMMER |
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