參數(shù)資料
型號(hào): DS1647
英文描述: Nonvolatile Timekeeping RAM
中文描述: 非易失時(shí)鐘RAM
文件頁(yè)數(shù): 1/11頁(yè)
文件大小: 187K
代理商: DS1647
1 of 11
072401
FEATURES
Integrates NV SRAM, real-time clock,
crystal, power-fail control circuit and lithium
energy source
Clock registers are accessed identically to the
static RAM. These registers are resident in
the eight top RAM locations
Totally nonvolatile with over 10 years of
operation in the absence of power
BCD coded year, month, date, day, hours,
minutes, and seconds with leap year
compensation valid up to 2100
Power-fail write protection allows for ±10%
V
CC
power supply tolerance
DS1647 only (DIP Module)
Standard JEDEC byte-wide 128k x 8
RAM pinout
DS1647P only (PowerCap
Module Board)
Surface mountable package for direct
connection to PowerCap containing
battery and crystal
Replaceable battery (PowerCap)
Power-fail output
Pin-for-pin compatible with other
densities of DS164XP Timekeeping
RAM
ORDERING INFORMATION
DS1647
*DS1647P
32-pin DIP module
34-pin PowerCap Module
Board
PowerCap (Required; must
be ordered separately)
*DS9034PCX
PIN ASSIGNMENT
DS1647/DS1647P
Nonvolatile Timekeeping RAM
www.maxim-ic.com
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NC
A15
A16
PFO
V
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
A17
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
32
31
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33
A18
X1
GND V
BAT
X2
34-Pin PowerCap Module Board
(Uses DS9034PCX PowerCap)
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31
30
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21
32-Pin Encapsulated Package
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ1
DQ2
GND
DQ0
V
CC
A15
A17
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ5
DQ4
DQ3
DQ6
32
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18
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20
A16
A18
相關(guān)PDF資料
PDF描述
DS1647P Nonvolatile Timekeeping RAM
DS1667-010 Digital Resistor with OP AMP
DS1667-100 Digital Resistor with OP AMP
DS1667-50 Digital Resistor with OP AMP
DS1667 Digital Resistor with OP AMP
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