DS1816-20 [ROCHESTER]

1-CHANNEL POWER SUPPLY SUPPORT CKT, PBCY3, TO-92, 3 PIN;


型号：	DS1816-20
厂家：	Rochester Electronics
描述：	1-CHANNEL POWER SUPPLY SUPPORT CKT, PBCY3, TO-92, 3 PIN
文件：	总8页 (文件大小：871K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DS1816

3.3V EconoReset with

Open Drain Output

www.maxim-ic.com

FEATURES

PIN ASSIGNMENT

C Automatically restarts a microprocessor after

power failure

DALLAS

DS1816

Econo

C Maintains reset for 150ms after V_CCreturns to

an in-tolerance condition

Reset

C Reduces need for discrete components

C Precision temperature-compensated voltage

reference and voltage sensor

TOP VIEW

SOT-23 PACKAGE

See Mech.

C Accurate 5%, 10% or 20% power monitoring

C 20% tolerance for use with 3V systems

C Low-cost TO-92 or space saving SOT-23

packages available

Drawings Section

On Website

1 2 3

C Efficient open-drain output with internal

5kꢀꢁpull-up resistor

BOTTOM VIEW

TO-92 PACKAGE

See Mech.

C Operating temperature -40LC to +85LC

Drawings Section

On Website

PIN DESCRIPTION

TO-92

RST

V_CC

Active Low Reset Output

Power Supply

GND

Ground

SOT-23

RST

V_CC

Active Low Reset Output

Power Supply

GND

Ground

DESCRIPTION

The DS1816 EconoReset uses a precision temperature reference and comparator circuit to monitor the

status of the power supply (V_CC). When an out-of-tolerance condition is detected, an internal power-fail

signal is generated which forces reset to the active state. When V_CCreturns to an in-tolerance condition,

the reset signal is kept in the active state for approximately 150ms to allow the power supply and

processor to stabilize.

1 of 5

041002

DS1816

OPERATION — POWER MONITOR

The DS1816 provides the function of detecting out-of-tolerance power supply conditions and warning a

processor-based system of impending power failure. When V_CCis detected as out-of-tolerance, the RST

signal is asserted. On power-up, RST is kept active for approximately 150ms after the power supply has

reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RST

is released.

BLOCK DIAGRAM (OPEN-DRAIN OUTPUT) Figure 1

APPLICATION EXAMPLE Figure 2

2 of 5

DS1816

TIMING DIAGRAM: POWER-UP Figure 3

TIMING DIAGRAM: POWER-DOWN Figure 4

3 of 5

DS1816

ABSOLUTE MAXIMUM RATINGS*

Voltage on V_CCPin Relative to Ground

-0.5V to +7.0V

Voltage on RST Relative to Ground

Operating Temperature Range

Storage Temperature Range

Soldering Temperature

-0.5V to V_CC+ 0.5V

-40°C to +85°C

-55°C to +125°C

260°C for 10 seconds

* 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

Supply Voltage

SYMBOL MIN

V_CC0.0

TYP

MAX

5.5

UNITS NOTES

DC ELECTRICAL CHARACTERISTICS

(-40LC to +85LC; V_CC= 1.2V to 5.5V)

PARAMETER

Output Current @ 0.4V

SYMBOL MIN

TYP

MAX

UNITS NOTES

I_OL

I_CC

+10

ꢂA

2, 3

Operating Current V_CC< 5.5V

V_CCTrip Point (DS1816-5)

V_CCTrip Point (DS1816-10)

V_CCTrip Point (DS1816-20)

Internal Pull-Up Resistor

Output Capacitance

3.15

2.97

2.64

7.5

V_CCTP

R_P

2.98

2.80

2.47

3.5

3.06

2.88

2.55

5.5

kꢀ

C_OUT

AC ELECTRICAL CHARACTERISTICS

(-40LC to +85LC; V_CC= 1.2V to 5.5V)

PARAMETER

RESET Active Time

SYMBOL MIN

TYP

150

MAX

250

UNITS NOTES

t_RST

t_RPD

100

ꢂs

V_CCDetect to RST

V_CCSlew Rate

(V_CCTP(MAX) to V_CCTP(MIN))

V_CCSlew Rate

t_F

300

ꢂs

t_R

(V_CCTP(MIN) to V_CCTP(MAX))

t_RPU

100

150

250

5, 6

V_CCDetect to RST

4 of 5

DS1816

NOTES:

1. All voltages are referenced to ground.

2. Measured with V_CCO 2.7V.

3. A 1kꢀꢁexternal pull-up resistor may be required in some applications for proper operation of the

microprocessor reset control circuit.

4. Measured with RST output open.

5. Measured with 2.7V ? V_CC? 3.3V.

6. t_R= 5ꢂs

7. V_OHand I_OHare a function of the value of R_Pand the associated output load conditions.

8. The t_Fvalue is for reference in defining values for t_RPDand should not be considered a requirement for

proper operation or use of the device.

PART MARKING CODES

“A”, “B”, &“C” represent the device type.

810 . . . . DS1810

“D” represents the device tolerance.

A . . . . . . 5%

811 . . . . DS1811

B . . . . . . 10%

812 . . . . DS1812

C . . . . . . 15%

813 . . . . DS1813

D . . . . . . 20%

815 . . . . DS1815

816 . . . . DS1816

817 . . . . DS1817

818 . . . . DS1818

5 of 5

ENG LIS H • ? ? ? ? • ? ? ? • ? ?

WH AT' S N EW

PRO DU CT S

S OL UT IO NS

D ESIGN

A PPNOTES

SU PPORT

B U Y

M a x i m > P r o d u c t s > S u p e r v i s o r s , V o l t a g e M o n i t o r s , S e q u e n c e r s

D S 1816

1 . O t h e r o p t i o n s a n d l i n k s f o r p u r c h a s i n g p a r t s a r e l i s t e d a t : h t t p : / / w w w . m a x i m - i c . c o m / s a l e s .

2 . D i d n ' t F i n d W h a t Y o u N e e d ? A s k o u r a p p l i c a t i o n s e n g i n e e r s . E x p e r t a s s i s t a n c e i n f i n d i n g p a r t s , u s u a l l y w i t h i n o n e

b u s i n e s s d a y .

3 . P a r t n u m b e r s u f f i x e s : T o r T & R = t a p e a n d r e e l ; + = R o H S / l e a d - f r e e ; # = R o H S / l e a d - e x e m p t . M o r e : S e e F u l l D a t a

S h e e t o r P a r t N a m i n g C o n v e n t i o n s .

4 . * S o m e p a c k a g e s h a v e v a r i a t i o n s , l i s t e d o n t h e d r a w i n g . " P k g C o d e / V a r i a t i o n " t e l l s w h i c h v a r i a t i o n t h e p r o d u c t u s e s .

R o H S/ L e a d - F r e e ?

M a t e r i a l s A n a l y s i s

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 + 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 R - 5 / T R + C 0 4

D S 1 8 1 6 R - 1 0 / T & R / C 0 1

D S 1 8 1 6 R - 2 0 + T & R

D S 1 8 1 6 R - 1 0 + T & R

D S 1 8 1 6 R - 2 0 - U

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 + 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : S e e d a t a s h e e

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 - 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 - 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 - 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 R - 2 0 / T & R

D S 1 8 1 6 R - 1 0 / T & R

D S 1 8 1 6 R - 5 / T & R

D S 1 8 1 6 R - 1 0 - U +

D S 1 8 1 6 R - 2 0 - U +

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : S e e d a t a s h e e

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 + 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 + 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 R - 5 - U +

D S 1 8 1 6 R - 5 + T & R

D S 1 8 1 6 - 5 + T & R

D S 1 8 1 6 - 2 0 + T & R

D S 1 8 1 6 - 1 0 + T & R

D S 1 8 1 6 - 2 0 / T & R

D S 1 8 1 6 - 1 0 / T & R

D S 1 8 1 6 - 5 / T & R

D S 1 8 1 6 - 2 0

S O T 2 3 ; 3 p i n ; 8 m m

D w g : 2 1 - 0 0 5 1 H ( P D F )

U s e p k g c o d e / v a r i a t i o n : U 3 + 4 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : S e e d a t a s h e e

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 + 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 + 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 + 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 - 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 - 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 - 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 - 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 - 1 0

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 - 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 - 5

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 - 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : N o

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 - 2 0 +

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 + 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 - 5 +

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 + 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

D S 1 8 1 6 - 1 0 +

T O 9 2 ; 3 p i n ; 2 0 m m

D w g : 5 6 - G 0 0 0 6 - 0 0 1 A ( P D F )

U s e p k g c o d e / v a r i a t i o n : Q 3 + 1 *

- 4 0 C t o + 8 5 C R o H S / L e a d - F r e e : L e a d F r e e

M a t e r i a l s A n a l y s i s

D i d n ' t F i n d W h a t Y o u N e e d ?

N e x t D a y P r o d u c t S e l e c t i o n A s s i s t a n c e f r o m A p p l i c a t i o n s E n g i n e e r s

P a r a m e t r i c S e a r c h

A p p l i c a t i o n s H e l p

Q u i c k V i e w

T e c h n i c a l D o c u m e n t s

O r d e r i n g I n f o

M o r e I n f o r m a t i o n

D e s c r i p t i o n

D a t a S h e e t

A p p l i c a t i o n N o t e s

D e s i g n G u i d e s

E n g i n e e r i n g J o u r n a l s

R e l i a b i l i t y R e p o r t s

S o f t w a r e / M o d e l s

E v a l u a t i o n K i t s

P r i c e a n d A v a i l a b i l i t y

S a m p l e s

B u y O n l i n e

P a c k a g e I n f o r m a t i o n

L e a d - F r e e I n f o r m a t i o n

R e l a t e d P r o d u c t s

N o t e s a n d C o m m e n t s

E v a l u a t i o n K i t s

K e y F e a t u r e s

A p p l i c a t i o n s / U s e s

K e y S p e c i f i c a t i o n s

D i a g r a m

1 9 9 9 - 1 1 - 1 9

T h i s p a g e l a s t m o d i f i e d : 2 0 0 7 - 0 7 - 2 5

•

DS1816-20 [ROCHESTER]

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