|
|
PDF LTC1536C Data sheet ( Hoja de datos )
| Número de pieza | LTC1536C | |
| Descripción | Precision Triple Supply Monitor for PCI Applications | |
| Fabricantes | Linear Technology | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LTC1536C (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
LTC1536
Precision Triple Supply Monitor
for PCI Applications
FEATURES
s Simultaneously Monitors 5V, 3.3V and
Adjustable Inputs
s Guaranteed Threshold Accuracy: ±0.75%
s Low Supply Current: 100µA
s Internal Reset Time Delay: 200ms
s Manual Pushbutton Reset Input
s Active Low and Active High Reset Outputs
s Active Low “Soft” Reset Output
s Power Supply Glitch Immunity
s Guaranteed Reset for Either VCC3 ≥ 1V or VCC5 ≥ 1V
s Meets PCI tFAIL Timing Specifications Rev 2.1
s 8-Pin SO and MSOP Packages
U
APPLICATIO S
s PCI-Based Systems
s Desktop Computers
s Notebook Computers
s Intelligent Instruments
s Portable Battery-Powered Equipment
s Network Servers
DESCRIPTIO
The LTC®1536 is designed for PCI local bus applications
with multiple supply voltages that require low power,
small size, high speed and high accuracy supply
monitoring.
For 3.3V and 5V supplies that are > 500mV below spec or
for the condition when the 5V supply falls below the 3.3V
supply, the LTC1536 has a very fast response time capable
of meeting the PCI tFAIL timing specification. Tight 0.75%
threshold accuracy and glitch immunity ensure reliable
reset operation without false triggering.
The RST output is guaranteed to be in the correct state for
VCC5 or VCC3 down to 1V. The 100µA typical supply current
makes the LTC1536 ideal for power-conscious systems.
A manual pushbutton reset input provides the ability to
generate a very narrow “soft” reset pulse (100µs typ) or a
200ms reset pulse equivalent to a power-on reset. Both
SRST and RST outputs are open-drain and can be OR-tied
with other reset sources.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Motherboard PCI RST Generation
3.3V ± 0.3V
5V ± 5%
PWR GOOD
0.1µF
0.1µF
LTC1536
PUSHBUTTON
RESET
1
VCC3
2
VCC5
3
VCCA
4
GND
PBR
SRST
RST
RST
8
7
6
5
RPU
RST
RPU SELECTED TO MEET RISE TIME
SLEW RATE REQUIREMENTS (1k MIN)
PCI
LOCAL
BUS
1536 TA01
Power Fail Waveform
5V Dropping Below 3.3V by 300mV
VCC5 = 5V TO 3V STEP
VCC3 = VCCA = 3.3V
4.7k PULL-UP FROM
5 RST TO VCC3
4 VCC5
3
2
RST
1
0
TIME (20ns/DIV)
1536 TA02
1
1 page  
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1536
VCC3 Typical Transient Duration
vs Reset Comparator Overdrive
50
RESET OCCURS
45 ABOVE CURVE
40
35
30
25
20
15
10
5
0
0.001
0.01
0.1
1
VCC3 RESET COMPARATOR OVERDRIVE, VRT3 – VCC3 (V)
1536 G10
VCC5 Typical Transient Duration
vs Reset Comparator Overdrive
45
RESET OCCURS
40 ABOVE CURVE
35
30
25
20
15
10
5
0
0.001
0.01
0.1
1
VCC5 RESET COMPARATOR OVERDRIVE, VRT5 – VCC5 (V)
1536 G11
VCCA Typical Transient Duration
vs Reset Comparator Overdrive
40
RESET OCCURS
35 ABOVE CURVE
30
25
20
15
10
5
0
0.001
0.01
0.1
1
VCCA RESET COMPARATOR OVERDRIVE, VRTA – VCCA (V)
1536 G12
RST Output Voltage
vs Supply Voltage
5.0
4.5
VCC5 = VCC3 = VCCA
4.7k PULL-UP FROM RST TO VCC5
4.0 TA = 25°C
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE, VCC (V)
1536 G13
Undervoltage Response Time
vs Temperature
RST Output Voltage
vs Supply Voltage
5.0
4.5
VCC5 = VCC3 = VCCA
RST PIN LOADED WITH
4.0 10MΩ TO GND
TA = 25°C
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE, VCC (V)
1536 G16
Power-Fail Response Time
vs Temperature
DEVICE THRESHOLD
PCI SPEC
85° – 40°
25°
VCC3
tFAIL SPEC
MARGIN
VCC3 FALLING
FROM 3.3V TO
2.3V AT (– 0.1V/µs)
TIME (1µs/DIV)
RST
1536 G15
VCC5
85°
– 40°
25°
RST
TIME (20ns/DIV)
1536 G14
5
5 Page 
PACKAGE DESCRIPTION Dimensions in inches (millimeters) unless otherwise noted.
LTC1536
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
8 765
0.228 – 0.244
(5.791 – 6.197)
0.150 – 0.157**
(3.810 – 3.988)
0.010
(0.254
–
–
0.020
0.508)
×
45°
0.008 – 0.010
(0.203 – 0.254)
1
0°– 8° TYP
0.053 – 0.069
(1.346 – 1.752)
2
0.016 – 0.050
0.406 – 1.270
0.014 – 0.019
(0.355 – 0.483)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
34
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
SO8 0996
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LTC1536C.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LTC1536 | Precision Triple Supply Monitor for PCI Applications | Linear Technology |
| LTC1536C | Precision Triple Supply Monitor for PCI Applications | Linear Technology |
| LTC1536CMS8 | Precision Triple Supply Monitor for PCI Applications | Linear Technology |
| LTC1536CS8 | Precision Triple Supply Monitor for PCI Applications | Linear Technology |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |