參數(shù)資料
型號(hào)： DS1647P
廠商： DALLAS SEMICONDUCTOR
元件分類： XO, clock
英文描述： Nonvolatile Timekeeping RAM(非易失性計(jì)時(shí)RAM)
中文描述： 0 TIMER(S), REAL TIME CLOCK, DMA34
封裝： POWERCAP MODULE-34
文件頁(yè)數(shù)： 1/12頁(yè)
文件大?。?/td> 131K
代理商： DS1647P
DS1647/DS1647P
Nonvolatile Timekeeping RAM
DS1647/DS1647P
PRELIMINARY
031798 1/12
FEATURES
Integrated NV SRAM, real time clock, crystal, power–
fail control circuit and lithium energy source
Clock registers are accessed identical 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
Access times of 120 ns and 150 ns
BCD coded year, month, data, 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)
– Upward compatible with the DS1646 Timekeep-
ing RAM
– Standard JEDEC Byte–wide 512K x 8 static
RAM pinout
DS1647P only (PowerCap Module Board)
– Surface mountable package for direct connec-
tion 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–XXX
–120 120 ns access
150 ns access
–150
*DS1647P–XXX
–120 120 ns access
150 ns access
–150
(28–pin DIP module)
(34–pin PowerCap Module Board)
*DS9034PCX (PowerCap) Required; must be
ordered separately
PIN ASSIGNMENT
CE
DQ7
DQ6
DQ5
DQ4
DQ3
OE
A10
WE
A13
A8
A9
A11
V
CC
A15
A17
512K X 8
32–PIN ENCAPSULATED PACKAGE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A18
A16
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
GND
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
WE
PFO
V
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
A18
A17
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
NC
A15
A16
34–POWERCAP MODULE BOARD
(USES DS9034PCX POWERCAP)
X1
GND
X2
V
BAT
PIN DESCRIPTION
A0–A18
CE
OE
WE
V
CC
GND
DQ0–DQ7
NC
PFO
X1, X2
V
BAT
–
–
–
–
–
–
–
–
–
–
–
Address Input
Chip Enable
Output Enable
Write Enable
+5 Volts
Ground
Data Input/Output
No Connection
Power–Fail Output (DS1647P only)
Crystal Connection
Battery Connection
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1647P-120 功能描述:實(shí)時(shí)時(shí)鐘 NV Timekeeping RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1647P-120+ 功能描述:實(shí)時(shí)時(shí)鐘 NV Timekeeping RAM RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1648 制造商:NSC 制造商全稱:National Semiconductor 功能描述:TRI-STATE TTL to MOS Multiplexers/Drivers
DS1648J 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer
DS1648J/A+ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2-Input Digital Multiplexer
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