Datasheet > 微控制器和处理器 > 其他 uPs/uCs/外围集成电路> DS1710S

DS1710S

更新时间： 2024-01-08 12:45:20

品牌	Logo	应用领域
达拉斯 - DALLAS		微控制器和处理器外围集成电路 uCs集成电路 uPs集成电路光电二极管
页数	文件大小	规格书
14页	212K
描述
Microprocessor Circuit, CMOS, PDSO16, 0.300 INCH, SOIC-16

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DS1710S 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
Reach Compliance Code：	unknown	风险等级：	5.69
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e0
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	NOT SPECIFIED	认证状态：	Not Qualified
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：	GULL WING
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
uPs/uCs/外围集成电路类型：	MICROPROCESSOR CIRCUIT	Base Number Matches：	1

DS1710S 数据手册

DS1710

DESCRIPTION

The DS1710 is a low-power CMOS circuit which solves the application problems of converting CMOS

RAMS into nonvolatile memories. In addition the device has the ability to unconditionally write protect

blocks of memory so that inadvertent write cycles do not corrupt program and special data space. The

incoming power supply voltage at the V_CCIinput pin is constantly monitored for an out-of-tolerance

condition. When such a condition is detected, both the chip enable and write enable outputs are inhibited

to protect stored data. The battery inputs are used to supply V_CCOwith power when V_CCIis less than the

battery input voltages. Special circuitry uses a low leakage CMOS process which affords precise voltage

detection at extremely low current consumption. By combining the DS1710 Partitioned NV Controller

chip with a CMOS memory and batteries, nonvolatile RAM operation can be achieved.

The DS1710 Partitioned NV Controller incorporates all the functions of the DS1610 with the additional

feature of either +3.0V or +5.0V operation. The DS1710 functions like the Dallas Semiconductor DS1210

NV controller when the ( DIS) disable pin is grounded and also incorporates the power-up auto sensing.

An internal pulldown resistor to ground on the DIS pin of the DS1710S allows it to retrofit into DS1210S

applications. When the DIS pin is grounded the address inputs A_W- A_Zand the write enable input WEI

are ignored. Also the power-fail output PFO and the write enable output WEO are tristated.

POWER-UP AUTO SENSING

V_CCIwill accept either +3.0V or +5.0V input. Selection of 3V operation is automatically invoked when

V_CCrises and remains between V_CCTP2and V_CCTP1for t_REC. 5V operation is automatically selected if V_CC

rises and remains above both V_CCTP2and V_CCTP1for t_REC. In either case, t_RECis measured from the time

V_CCfirst rises above V_CCTP2. The DS1710 will not change modes until V_CCfalls below V_CCTP2

OPERATION - DISABLE PIN CONNECTED TO V_CCO

The DS1710 performs five circuit functions required to battery-backup a RAM. First, a switch is provided

to direct power from the battery or the incoming power supply (V_CCI) depending on which is greater. This

switch has a voltage drop of less than 0.2 volts. The second function provided by the DS1710 is power-

fail detection. The incoming supply (V_CCI) is constantly monitored. When the supply goes out of

tolerance a precision comparator detects power failure and inhibits both the chip enable output (CEO ) and

the write enable output ( WEO ). A third function of write protection is accomplished by holding both the

chip enable output CEO and write enable output WEO to within 0.2 volts of V_CCOwhen V_CCIis out of

tolerance. If CEI is low at the time that power-fail detection occurs the CEO signal is kept low until CEI

is brought high again. However, CEO is forced high after 1.5 µs regardless of the state of CEI . Similarly,

if WEI is low at the time that power-fail detection occurs, the WEO signal will remain low until WEI is

brought high or 1.5 µs elapses. The delay of write protection until the current memory cycle is complete

prevents corrupted data. Power-fail detection occurs in the range of 4.75 to 4.5 volts with the tolerance

pin TOL grounded and in 5-volt mode. If the tolerance pin is connected to V_CCOwhile in 5-volt mode,

then power-fail detection occurs in the range of 4.5 volts to 4.25 volts. If in 3-volt mode, the power-fail

detection will occur in the range of 2.7 to 2.5 volts. The PF0 signal is driven low and remains low until

V_CCIreturns to nominal conditions. During nominal supply conditions CEO will follow CEI and WEO

will follow WEI . The fourth function which the DS1710 performs is a battery status warning so that

potential data loss is avoided. Each time V_CCIis applied to the device battery status is checked with a

precision comparator. If during battery backup, no switch occurred from one battery to the other, the

voltage of the battery supplying power when V_CCIis applied is checked. If this voltage is less than 2.0

volts the second chip enable cycle after power is applied is inhibited. If any switch from one battery to

another did occur the voltage of both batteries is checked. If either voltage is less than 2.0 volts the

second chip enable cycle will be inhibited. Battery status can therefore be determined by performing a

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与DS1710S相关器件

型号	品牌	获取价格	描述	数据表
DS1710SN	DALLAS	获取价格	Microprocessor Circuit, CMOS, PDSO16,
DS17-12A	IXYS	获取价格	Rectifier Diode Avalanche Diode
DS17-12A	NJSEMI	获取价格	Diode 1.2KV 25A 2-Pin DO-203AA
DS17-14A	IXYS	获取价格	Rectifier Diode, 1 Phase, 1 Element, 25A, 1400V V(RRM), Silicon,
DS17-16A	IXYS	获取价格	Rectifier Diode, 1 Phase, 1 Element, 25A, 1600V V(RRM), Silicon,
DS17-16A	LITTELFUSE	获取价格	Rectifier Diode, 1 Phase, 1 Element, 25A, 1600V V(RRM), Silicon,
DS1720	DALLAS	获取价格	Econo . Digital Thermometer and Thermostat
DS1720	MAXIM	获取价格	Operating Instructions
DS1720S	MAXIM	获取价格	Serial Switch/Digital Sensor, 9 Bit(s), Rectangular, 8 Pin, Surface Mount, 0.208 INCH, SOI
DS1720S+T&R	MAXIM	获取价格	Serial Switch/Digital Sensor, 9 Bit(s), Rectangular, 8 Pin, Surface Mount, 0.208 INCH, LEA

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