PT7M1813-15NBE [PERICOM]
Power Supply Support Circuit, Fixed, 1 Channel, LEAD FREE, TO-236AB, TO-92, 3 PIN;
| 型号： | PT7M1813-15NBE |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | Power Supply Support Circuit, Fixed, 1 Channel, LEAD FREE, TO-236AB, TO-92, 3 PIN |
| 文件： | 总7页 (文件大小：258K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Supervisory Circuit
Features
Description
The series are designed to monitor power supplies in µP
Highly accurate: 1.5% (25°C)
and digital systems. It provides excellent circuit
reliability and low cost by eliminating external
components and adjustments.
Accurate power monitoring: 2.5V, 2.9V, 3.0V
(PT7M1818), and 4.1, 4.3, 4.6V (PT7M1813)
Operating voltage range: 1.0V ~ 5.5V
Operating temperature range: -40°C to + 85°C
Detect voltage temperature characteristics: 2.5%
TYP
This device performs a single function: it asserts a reset
signal whenever the VCC supply voltage falls below a
preset threshold. Reset remains asserted for 200ms after
VCC has risen above the reset threshold.
Efficient operation output with internal 5k pull-up
resistor
PT7M1818/1813 are bidirectional output, allowing it to
be directly connected to µP with bidirectional reset
inputs.
Maintains reset for 200ms after VCC returns to an in-
tolerance condition
Pin Configuration
PT7M1818/1813
PT7M1818/1813
1
2
RST
GND
3
1
2
3
VCC
RST VCC GND
TO-92
SOT23-3
Pin Description
Name
Type
Description
Reset Output and Pushbutton Input: RST is asserted when VCC drops below voltage threshold
VTH-. Active low. When other devices pull RST low, the reset condition occurs and will remain a
reset timeout period after the external signal is off.
I/O
RST
GND
VCC
P
P
Ground
Supply Voltage.
12-07-0002
PT0190-4
07/05/12
1
PT7M1818/1813
Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Maximum Ratings
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other
conditions above those indicated in the operational
sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Storage Temperature ............................................................-65oC to +150oC
Ambient Temperature with Power Applied.......................... -40oC to +85oC
Supply Voltage to Ground Potential (Vcc to GND) ..............-0.3V to +7.0V
DC Input Voltage (All inputs except Vcc and GND)......-0.3V to VCC+0.3V
DC Output Current (All outputs) ..........................................................30mA
Power Dissipation .......................................... 320mW (Depend on package)
DC Electrical Characteristics
(TA= -40~85ºC, unless otherwise noted. Typical values are at TA = +25ºC)
Description
Supply Voltage
Sym.
Test Conditions
Min
1.0
-
Typ
Max
5.5
Unit
V
VCC
-
-
-
VCC = 5.5V. No load.
VCC = 3.6V. No load.
12
µA
µA
Supply Current
ICC
-
10
(VTH-
0.985
(VTH-
)
(VTH-)
VTH-
VTH-
50
V
V
+25C
1.015
(VTH-
Voltage Threshold
Hysteresis
VTH-
)
)
-40C~85C
0.975
1.025
*
VHYS
VTH+ - VTH-
-
-
mV
IOH = 8mA, VCC = 5V
IOH = 4mA, VCC = 3V
IOH = -50µA, VCC = 1V
-
-
-
-
-
-
0.4
0.3
Output
Driving
Output low
VOL
Rp
V
0.09
Internal pull-up resistor
3.75
5
6.25
k
RST
Note: VTH- is voltage threshold when VCC falls from high to low. VTH+ is voltage threshold when VCC rises from low to high.
12-07-0002
PT0190-4
07/05/12
2
PT7M1818/1813
Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
AC Electrical Characteristics
Fig 1. Timing diagram
tSEN
VRST
VCC
1V
0V
tRPD
tRS
tRS
RST
1V
0V
Uncertain state
Fig 2. Timing diagram
VRST
VCC
1V
0V
tRS
tRS
tPD
0.8VCC
RST
1V
0.8V
0V
External pull down
signal release
Uncertain state
(VCC = 1.0V to 5.5V, TA= -40~85ºC, unless otherwise noted. Typical values are at TA = +25ºC)
Sym.
Description
Test Conditions
Min
140
-
Typ
200
17
-
Max
Unit
s
tRS
Reset Timeout Period
-
-
-
280
tRPD Delay
tSEN Sensitivity
-
-
-
s
20
1
s
tPD
External Pull Down Signal Pulse
Pushbutton Detect*
-
s
RST pin
RST pin
0.8
1.5
2.0
V
*Note: RST will be asserted when it is pull down to the typical value or less.
12-07-0002
PT0190-4
07/05/12
3
PT7M1818/1813
Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Block Diagram
Vcc
5k
Reset
Monitor
VCC Resistor
Divider
RST
Timing
Delay
T.C.
Reference
GND
Function Description
Power Monitor
A microprocessor’s (µP’s) reset input starts the µP in a known state. Whenever the µP is in an unknown state, it should be held in
reset. The supervisory circuits assert reset during power-up and prevent code execution errors during power-down or brownout
conditions.
On power-up, once Vcc reaches about 1.0V, RST is a guaranteed logic low of 0.4V or less. As Vcc rises, RST stays low. When
Vcc rises above the reset threshold VRST, an internal timer releases RST after about 200ms. RST asserts whenever Vcc drops
below the reset threshold, i.e. brownout condition. If brownout occurs in the middle of a previously initiated reset pulse, the pulse
continues for at least another 200ms. On power-down, once Vcc falls below the reset threshold, RST stays low and is guaranteed
to be 0.4V or less until Vcc drops below 1V.
Reset Output: Bi-direction
The devices provide RST output pin for a pushbutton switch. When the devices are not in a reset cycle, it continuously monitors
the RST signal for a low going edge. If an edge is detected, the devices will debounce the switch by pulling the RST line low.
After the internal timer has expired, the devices will continue to monitor the RST line. If the line is still low, they will continue to
monitor the line looking for a rising edge. Upon detecting a release, they will force the RST line low and hold it low for 200ms.
Application Information
Typical Operation Circuit
Vcc
MICROPROCESSOR
RESET
RST
PT7M1818
/1813
12-07-0002
PT0190-4
07/05/12
4
PT7M1818/1813
Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Mechanical Information
TO92-3
PKG. DIMENSIONS(MM)
SYMBOL
MIN
3.3
1.1
0.38
0.36
4.30
3.43
4.30
MAX
3.7
1.4
0.55
0.51
4.70
A
A1
b
c
D
D1
E
e
4.70
2.64
1.27TYP
e1
2.44
F1
F2
L
2.50TYP
2.50TYP
12
13
10.00
1.6
L1
φ
9.00
h
0.00
0.38
12-07-0002
PT0190-4
07/05/12
5
PT7M1818/1813
Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
SOT23-3
PKG. DIMENSIONS(MM)
SYMBOL
MIN
1.05
0
MAX
1.25
0.1
A
A1
A2
1.05
1.15
b
c
0.3
0.1
0.5
0.2
D
E
E1
e
2.82
1.5
2.65
3.02
1.7
2.95
Note:
1) Controlling dimensions in millimeters.
0.95BSC
e1
L
1.8
0.3
0°
2
0.6
8°
θ
Ordering Information
Part Number
PT7M1818-20TE
PT7M1818-20NBE
PT7M1818-10TE
PT7M1818-10NBE
PT7M1818-5TE
PT7M1818-5NBE
PT7M1813-15TE
PT7M1813-15NBE
PT7M1813-10TE
PT7M1813-10NBE
PT7M1813-5TE
PT7M1813-5NBE
Package Code
Package
Lead free and Green SOT23-3
Lead free TO92
Lead free and Green SOT23-3
Lead free TO92
Lead free and Green SOT23-3
Lead free TO92
Lead free and Green SOT23-3
Lead free TO92
Lead free and Green SOT23-3
Lead free TO92
Lead free and Green SOT23-3
Lead free TO92
T
NB
T
NB
T
NB
T
NB
T
NB
T
NB
Note:
E = Pb-free or Pb-free and Green
Adding X Suffix= Tape/Reel
Contact Pericom for availability.
12-07-0002
PT0190-4
07/05/12
6
PT7M1818/1813
Supervisory Circuit
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Small Package Top Marking Instruction
AA LJ
DATE CODE
YEAR & WORK WEEK
PART NO.
2 BIT CODE
(See Table 1)
Lead-Free Sign
-: lead-free or Lead
free and Green
Sample: QWLJ
PART NO.: PT7M1818-20
DATE CODE: YEAR 2003 WW10
Lead free and Lead free and Green package
Table 1. Function comparison
Reset Output
Item
Part No.
Open-Drain
Push-Pull
Bi-direct
VTH- (V)
Active high
Active low
Active high
Active low
Active low
PT7M1818-20
PT7M1818-10
PT7M1818-5
PT7M1813-15
PT7M1813-10
PT7M1813-5
1
2
3
4
5
6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2.5
2.9
3.0
4.1
4.3
4.6
Table 2 Marking code for products
No.
1
2
3
4
Part No.
Code
QW
RA
RB
RL
RO
RR
PT7M1818-20
PT7M1818-10
PT7M1818-5
PT7M1813-15
PT7M1813-10
PT7M1813-5
5
6
Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply
the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The
company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom.
12-07-0002
PT0190-4
07/05/12
7
相关型号：
PT7M1813-5TE
Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, GREEN, TO-236AB, SOT-23, 3 PIN
DIODES
PT7M1813-5TE
Power Supply Support Circuit, Fixed, 1 Channel, PDSO3, GREEN, TO-236AB, SOT-23, 3 PIN
PERICOM
©2020 ICPDF网 联系我们和版权申明