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DP8572AV PDF预览

DP8572AV

更新时间: 2024-01-29 13:56:57
品牌 Logo 应用领域
德州仪器 - TI 双倍数据速率输出元件外围集成电路
页数 文件大小 规格书
22页 367K
描述
0 TIMER(S), REAL TIME CLOCK, PQCC28, PLASTIC, LCC-28

DP8572AV 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:QCCJ, LDCC28,.5SQReach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.77其他特性:PRESCALED XTAL OSCILLATOR OUTPUT FOR RTC; POWER FAIL I/P FOR BUS LOCK-OUT
外部数据总线宽度:8信息访问方法:PARALLEL, DIRECT ADDRESS
中断能力:YJESD-30 代码:S-PQCC-J28
JESD-609代码:e0长度:11.43 mm
端子数量:28计时器数量:
片上数据RAM宽度:8最高工作温度:85 °C
最低工作温度:-40 °C封装主体材料:PLASTIC/EPOXY
封装代码:QCCJ封装等效代码:LDCC28,.5SQ
封装形状:SQUARE封装形式:CHIP CARRIER
峰值回流温度(摄氏度):NOT SPECIFIED电源:5 V
认证状态:Not QualifiedRAM(字数):44
座面最大高度:4.57 mm子类别:Timer or RTC
最大压摆率:20 mA最大供电电压:5.5 V
最小供电电压:4.5 V标称供电电压:5 V
表面贴装:YES技术:CMOS
温度等级:INDUSTRIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:J BEND端子节距:1.27 mm
端子位置:QUAD最短时间:1/100 SECOND
处于峰值回流温度下的最长时间:NOT SPECIFIED易失性:YES
宽度:11.43 mmuPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCK
Base Number Matches:1

DP8572AV 数据手册

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V
: This is the main system power pin.  
CC  
General Description (Continued)  
GND: This is the common ground power pin for both V  
.
BB  
The DP8572A’s interrupt structure provides three basic  
types of interrupts: Periodic, Alarm/Compare, and Power  
Fail. Interrupt mask and status registers enable the masking  
and easy determination of each interrupt.  
and V  
CC  
Connection Diagrams  
Dual-In-Line  
Pin Description  
CS, RD, WR (Inputs): These pins interface to mP control  
lines. The CS pin is an active low enable for the read and  
write operations. Read and Write pins are also active low  
and enable reading or writing to the RTC. All three pins are  
disabled when power failure is detected. However, if a read  
or write is in progress at this time, it will be allowed to com-  
plete its cycle.  
A0A4 (Inputs): These 5 pins are for register selection.  
They individually control which location is to be accessed.  
These inputs are disabled when power failure is detected.  
OSC IN (Input): OSC OUT (Output): These two pins are  
used to connect the crystal to the internal parallel resonant  
oscillator. The oscillator is always running when power is  
applied to V and V , and the correct crystal select bits in  
BB CC  
the Real Time Mode Register have been set.  
MFO (Output): The multi-function output can be used as a  
second interrupt output for interrupting the mP. This pin can  
also provide an output for the oscillator. The MFO output is  
configured as push-pull, active high for normal or single  
power supply operation and as an open drain during stand-  
TL/F/9980–5  
Top View  
Order Number DP8572AN or DP8572AMD/883  
See NS Package Number D24C or N24C  
l
by mode (V  
V ). If in battery backed mode and a pull-  
CC  
BB  
up resistor is attached, it should be connected to a voltage  
no greater than V  
.
BB  
Plastic Chip Carrier  
INTR (Output): The interrupt output is used to interrupt the  
processor when a timing event or power fail has occurred  
and the respective interrupt has been enabled. The INTR  
output is permanently configured active low, open drain. If in  
battery backed mode and a pull-up resistor is attached, it  
should be connected to a voltage no greater than V . The  
BB  
output is a DC voltage level. To clear the INTR, write a 1 to  
the appropriate bit(s) in the Main Status Register.  
D0D7 (Input/Output): These 8 bidirectional pins connect  
to the host mP’s data bus and are used to read from and  
write to the RTC. When the PFAIL pin goes low and a write  
is not in progress, these pins are at TRI-STATE.  
PFAIL (Input): In battery backed mode, this pin can have a  
digital signal applied to it via some external power detection  
e
logic. When PFAIL  
logic 0 the RTC goes into a lockout  
mode, in a minimum of 30 ms or a maximum of 63 ms unless  
lockout delay is programmed. In the single power supply  
mode, this pin is not useable as an input and should be tied  
TL/F/9980–6  
to V . Refer to section on Power Fail Functional Descrip-  
CC  
tion.  
Top View  
Order Number DP8572AV  
See NS Package Number V28A  
V
(Battery Power Pin): This pin is connected to a back-  
BB  
up power supply. This power supply is switched to the inter-  
nal circuitry when the V becomes lower than V . Utiliz-  
CC BB  
ing this pin eliminates the need for external logic to switch in  
and out the back-up power supply. If this feature is not to be  
used then this pin must be tied to ground, the RTC pro-  
grammed for single power supply only, and power applied to  
the V  
pin.  
CC  
7

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