DS1812R-10/T&R [ROCHESTER]
1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, TO236-AB, SOT-23, 3 PIN;
| 型号： | DS1812R-10/T&R |
| 厂家： | 
Rochester Electronics |
| 描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3, TO236-AB, SOT-23, 3 PIN 光电二极管 |
| 文件： | 总10页 (文件大小：1061K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DS1812
5V EconoReset with Active
High Push-Pull Output
www.maxim-ic.com
FEATURES
PIN ASSIGNMENT
C Automatically restarts a microprocessor after
power failure
DALLAS
DS1812
Econo
C Maintains reset for 150 ms after VCC returns
to an in-tolerance condition
Reset
C Reduces need for discrete components
C Precision temperature-compensated voltage
reference and voltage sensor
1
2
TOP VIEW
SOT-23 PACKAGE
See Mech.
C Low-cost TO-92, or space saving surface
mount SOT-23 packages available
C Push-pull active high output
Drawings Section
On Website
1 2 3
1 2 3
C Operating temperature -40LC to +85LC
BOTTOM VIEW
TO-92 PACKAGE
See Mech.
Drawings Section
On Website
PIN DESCRIPTION
TO-92
1
2
3
RST
VCC
Active High Reset Output
Power Supply
GND
Ground
SOT-23
1
2
3
RST
VCC
Active High Reset Output
Power Supply
GND
Ground
DESCRIPTION
The DS1812 EconoReset uses a precision temperature reference and comparator circuit to monitor the
status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail
signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition,
the reset signal is kept in the active state for approximately 150 ms to allow the power supply and
processor to stabilize.
1 of 5
041002
DS1812
OPERATION - POWER MONITOR
The DS1812 provides the function of detecting out-of-tolerance power supply conditions and warning a
processor-based system of impending power failure. When VCC is detected as out-of-tolerance, the RST
signal is asserted. On power-up, RST is kept active for approximately 150 ms after the power supply has
reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RST
is released.
BLOCK DIAGRAM (CMOS OUTPUT) Figure 1
APPLICATION EXAMPLE Figure 2
2 of 5
DS1812
TIMING DIAGRAM: POWER-UP Figure 3
TIMING DIAGRAM: POWER-DOWN Figure 4
3 of 5
DS1812
ABSOLUTE MAXIMUM RATINGS*
Voltage on VCC Pin Relative to Ground
Voltage on RST Relative to Ground
Operating Temperature
-0.5V to +7.0V
-0.5V to VCC +0.5V
-40°C to +85°C
Storage Temperature
-55°C to +125°C
260°C for 10 seconds
Soldering Temperature
* This is a stress rating only and functional operation of the device at these or any other conditions
above those indicated in the operation sections of this specification is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
(-40LC to +85LC)
PARAMETER
SYMBOL MIN
VCC 0.0
TYP
MAX
5.5
UNITS NOTES
Supply Voltage
V
1
DC ELECTRICAL CHARACTERISTICS
(-40LC to +85LC; VCC=1.2V to 5.5V)
PARAMETER
SYMBOL MIN
TYP
MAX
UNITS NOTES
VOH
VCC
VCC
V
1
Output Voltage @ 0-500 ꢀA
-0.5V -0.1V
Output Current @ 2.4 volts
Output Current @ 0.4 volts
Operating Current VCC < 5.5
VCC Trip Point (DS1812-5)
VCC Trip Point (DS1812-10)
VCC Trip Point (DS1812-15)
Output Capacitance
IOH
IOL
ICC
VCCTP
VCCTP
VCCTP
COUT
350
+10
30
2
2
3
1
1
1
ꢀA
mA
ꢀA
V
V
V
40
4.50
4.25
4.00
4.62
4.35
4.13
4.75
4.49
4.24
10
pF
AC ELECTRICAL CHARACTERISTICS
(-40LC to +85LC; VCC=1.2V to 5.5V)
PARAMETER
SYMBOL MIN
TYP
150
2
MAX
300
5
UNITS NOTES
RESET Active Time
VCC Detect to RST
VCC Slew Rate
tRST
tRPD
tF
100
300
0
ms
ꢀs
ꢀs
(VCCTP (MAX) to VCCTP (MIN))
VCC Slew Rate
tR
ns
(VCCTP (MIN) to VCCTP (MAX))
VCC Detect to RST
tRPU
100
150
300
ms
4
4 of 5
DS1812
NOTES:
1. All voltages are referenced to ground.
2. Measured with VCC O 2.7 volts.
3. Measured with RST output open.
4. tR = 5 ꢀs.
PART MARKING CODES
SOT-23 PACKAGE
“A”, “B”, &“C” represent the device type.
“D” represents the device tolerance.
810
811
812
813
815
816
817
818
-
-
-
-
-
-
-
-
DS1810
DS1811
DS1812
DS1813
DS1815
DS1816
DS1817
DS1818
A
B
C
D
-
-
-
-
5%
10%
15%
20%
5 of 5
EN GL ISH • ? ? ? ? • ? ? ? • ? ? ?
C OM PA N Y M EM B ER S
WH AT ' S N EW PR ODUCTS SO LU TI ONS D E SI G N
AP P NOT ES SUPP ORT
BU Y
DS 1 81 2
Pa r t Nu mb e r T ab l e
N o te s:
1 . S ee t he DS1 812 Q uic kVie w D at a Sh ee t f or f urt her inf orm ati on o n th is p rodu ct f ami l y or d ow n lo a d th e DS181 2 ful l data s heet
( PD F, 128kB) .
2. O th er o p ti on s a n d l in ks fo r p urch asi ng p arts a re l is te d at : h t tp : / /w w w. m a xi m -i c . co m /s al es .
3 . Did n' t F ind W ha t You Ne ed ? As k o u r ap p l ic at i o n s e n gi n ee r s . E x p er t as s is t a nc e i n fi ndi ng pa r ts , us ua lly wi th in one bus iness day.
4. Pa r t n u mb e r suf f ix e s: T o r T &R = ta p e a n d r e e l; + = Ro HS/le ad - fr e e ; # = Ro H S/lea d - e xe m p t. Mo r e : S e e fu ll da t a sh e et o r Par t
Nam ing Conve nti ons .
5 . * S ome p ackages hav e variations, listed on the drawing. " PkgCode/Variation" tells w hi ch vari at i on th e pro d uct u se s.
P ar t Num ber
N ot es F r ee
Sa mp le
B uy
D i re c t
T em p
R oHS/L ead- Fr ee?
Ma t e ri a l s A n a ly s is
P a c ka g e : TY PE P INS S IZE
D R A WI N G C O D E / VA R *
DS1 812R -5/T& R/C01
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
D S1 8 1 2R -1 5 + T &R
D S1 81 2R -1 0+T & R
DS 1 81 2 R -1 5 - U
5 V -
1 5%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U s e p k g c o d e/v a r ia tio n : U 3 + 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5 V -
1 0%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U s e p k g c o d e/v a r ia tio n : U 3 + 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5 V -
1 5%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
DS 1 81 2 R -1 0 - U
D S18 12 R- 5-U
5 V -
1 0%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
5V- 5%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
D S1812R- 15/T &R
D S1812R- 10/T &R
DS 181 2R-5 -U+
D S1 8 1 2R -5 + T & R
D S1 8 1 2 R-1 5 - U +
D S1 8 1 2 R-1 0 - U +
DS 18 1 2 R -5 / T &R
D S1 81 2- 5+ T& R
D S1 8 1 2- 1 0 +T & R
5 V -
1 5%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
5 V -
1 0%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U s e p k g c o d e/v a r ia tio n : U 3 + 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5V- 5%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U s e p k g c o d e/v a r ia tio n : U 3 + 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U s e p k g c o d e/v a r ia tio n : U 3 + 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U s e p k g c o d e/v a r ia tio n : U 3 + 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5V- 5%
5V- 5%
SOT23;3 pin;50
Dwg : 2 1 - 0 0 5 1 G (P D F )
U se pkgc ode /va r ia tion: U 3- 4 *
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 3 A (P D F )
Use pkgc ode/ varia tion : Q3+4*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5 V -
1 0%
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 3 A (P D F )
Use pkgc ode/ varia tion : Q3+4*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
D S 1 8 1 2 - 1 5 +
D S1 8 1 2- 1 5 +T & R
DS 18 1 2 -1 5 / T& R
DS 18 1 2 -1 0 / T& R
DS 18 12-5 /T& R
D S 1 8 1 2 - 1 5
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 1 A (P D F )
Use pkgc ode/ varia tion : Q3+1*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5 V -
1 5%
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 3 A (P D F )
Use pkgc ode/ varia tion : Q3+4*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
5 V -
1 5%
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 3 A (P D F )
Us e pk gcod e/v aria tio n: Q3- 4*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
5 V -
1 0%
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 3 A (P D F )
Us e pk gcod e/v aria tio n: Q3- 4*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
5V- 5%
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 3 A (P D F )
Us e pk gcod e/v aria tio n: Q3- 4*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
5 V -
1 5%
M o ni t or
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 1 A (P D F )
Us e pk gcod e/v aria tio n: Q3- 1*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
D S 1 8 1 2 - 1 0
5 V -
1 0%
M o ni t or
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 1 A (P D F )
Us e pk gcod e/v aria tio n: Q3- 1*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
D S 1 8 1 2 - 5
5V- 5%
M o ni t or
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 1 A (P D F )
Us e pk gcod e/v aria tio n: Q3- 1*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: N o
Ma t e ri a l s A n a ly s is
D S 1 8 1 2 - 1 0 +
D S 1 8 1 2 - 5 +
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 1 A (P D F )
Use pkgc ode/ varia tion : Q3+1*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
TO9 2;3 pi n;18 5
Dwg : 5 6 - G 0 0 0 6 - 0 0 1 A (P D F )
Use pkgc ode/ varia tion : Q3+1*
- 4 0 C t o + 8 5 C Ro H S / Le a d -F re e: Yes
Ma t e ri a l s A n a ly s is
Di d n' t F ind W ha t You Ne e d ?
CO NT ACT U S: SE ND US AN EMAI L
Co p y rig h t 2 00 7 b y M a x im I n te g r a te d Pr o d u c ts , D a lla s S em i co n d u c to r • Le ga l N ot i ce s • P ri va c y P o l ic y
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