|
|
PDF CAT15016 Data sheet ( Hoja de datos )
| Número de pieza | CAT15016 | |
| Descripción | (CAT15008 / CAT15016) Voltage Supervisor | |
| Fabricantes | Catalyst Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de CAT15016 (archivo pdf) en la parte inferior de esta página. Total 15 Páginas | ||
|
No Preview Available !
CAT15008, CAT15016
Voltage Supervisor with 8-Kb and 16-Kb
SPI Serial CMOS EEPROM
FEATURES
DESCRIPTION
Precision Power Supply Voltage Monitor
5V, 3.3V, 3V & 2.5V systems
7 threshold voltage options
The CAT15008/16 (see table below) are memory and
supervisory solutions for microcontroller based systems. A
CMOS serial EEPROM memory and a system power
supervisor with brown-out protection are integrated
Active High or Low Reset
together. Memory interface is via SPI bus serial
Valid reset guaranteed at VCC = 1V
interface.
10MHz SPI compatible
32-byte page write buffer
The CAT15008/16 provides a precision VCC sense
circuit with two reset output options: CMOS active low
Low power CMOS technology
1,000,000 Program/Erase cycles
100 year data retention
output or CMOS active high. The RESET output is
active whenever VCC is below the reset threshold or
falls below the reset threshold voltage.
Industrial temperature range
RoHS-compliant 8-pin SOIC package
The power supply monitor and reset circuit protect
system controllers during power up/down and against
brownout conditions. Seven reset threshold voltages
support 5V, 3.3V, 3V and 2.5V systems. If power
For Ordering Information details, see page 14.
supply voltages are out of tolerance reset signals
become active, preventing the system microcontroller,
ASICwww.DataSheet4U.com or peripherals from operating. Reset signals
PIN CONFIGURATION
become inactive typically 240ms after the supply
voltage exceeds the reset threshold level.
SOIC (W)
C¯¯S 1
SO 2
¯W¯P¯ 3
8 VCC
7 RST/¯R¯S¯T¯
6 SCK
VSS 4
5 SI
MEMORY SIZE SELECTOR
Product
15008
15016
Memory density
8-Kbit
16-Kbit
PIN FUNCTION
Pin Name
C¯¯S
SO
¯W¯P¯
VSS
SI
SCK
RST/¯R¯S¯T¯
VCC
Function
Chip Select
Serial Data Output
Write Protect
Ground
Serial Data Input
Serial Clock Input
Reset Output
Power Supply
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
THRESHOLD SUFFIX SELECTOR
Nominal Threshold
Voltage
4.63V
4.38V
4.00V
3.08V
2.93V
2.63V
2.32V
Threshold Suffix
Designation
L
M
J
T
S
R
Z
1 Doc. No. 1125 Rev. A
1 page  
CAT15008, CAT15016
PIN DESCRIPTION
RESET/R¯¯E¯S¯E¯T¯: Reset output is available in two
versions: CMOS Active Low (CAT150xx9) and CMOS
Active High (CAT150xx1). Both versions are push-pull
outputs for high efficiency.
SI: The serial data input pin accepts op-codes,
addresses and data. In SPI modes (0,0) and (1,1)
input data is latched on the rising edge of the SCK
clock input.
SO: The serial data output pin is used to transfer data
out of the device. In SPI modes (0,0) and (1,1) data is
shifted out on the falling edge of the SCK clock.
SCK: The serial clock input pin accepts the clock
provided by the host and used for synchronizing
communication between host and CAT15008/16.
C¯¯S: The chip select input pin is used to enable/disable
the CAT15008/16. When C¯¯S is high, the SO output is
tri-stated (high impedance) and the device is in
Standby Mode (unless an internal write operation is in
progress). Every communication session between host
and CAT15008/16 must be preceded by a high to low
transition and concluded with a low to high transition of
the C¯¯S input.
¯W¯P¯: The write protect input pin will allow all write
operations to the device when held high. When ¯W¯P¯
pin is tied low and the WPEN bit in the Status
Register (refer to Status Register description, later in
this Data Sheet) is set to “1”, writing to the Status
Register is disabled.
DEVICE OPERATION
The CAT15008/16 products combine the accurate
voltage monitoring capabilities of a standalone voltage
supervisor with the high quality and reliability of
standard EEPROMs from Catalyst Semiconductor.
RESET CONTROLLER DESCRIPTION
The reset signal is asserted LOW for the CAT150xx9
and HIGH for the CAT150xx1 when the power supply
voltage falls below the threshold trip voltage and
remains asserted for at least 140ms (tPURST) after the
power supply voltage has risen above the threshold.
Reset output timing is shown in Figure 1.
The CAT15008/16 devices protect µPs against brown-out
failure. Short duration VCC transients of 4µsec or less and
100mV amplitude typically do not generate a Reset pulse.
VCC
VTH
VRVALID
RESE T
t PURS T
t RPD
t PURS T
t RPD
CAT150xx9
RESE T
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Figure 1. RESET Output Timing
5
CAT150xx1
Doc. No. 1125 Rev. A
5 Page 
CAT15008, CAT15016
READ OPERATIONS
Read from Memory Array
To read from memory, the host sends a READ
instruction followed by a 16-bit address (see Table 5 for
the number of significant address bits).
After receiving the last address bit, the CAT15008/16
will respond by shifting out data on the SO pin (as
shown in Figure 10). Sequentially stored data can be
read out by simply continuing to run the clock. The
internal address pointer is automatically incremented
to the next higher address as data is shifted out. After
reaching the highest memory address, the address
counter “rolls over” to the lowest memory address, and
the read cycle can be continued indefinitely. The read
operation is terminated by taking C¯¯S high.
Read Status Register
To read the status register, the host simply sends a
RDSR command. After receiving the last bit of the
command, the CAT15008/16 will shift out the contents
of the status register on the SO pin (Figure 11). The
status register may be read at any time, including
during an internal write cycle.
Figure 10. READ Timing
CS
SCK
0 1 2 3 4 5 6 7 8 9 10 20 21 22 23 24 25 26 27 28 29 30
OPCODE
BYTE ADDRESS*
SI 0 0 0 0 0 0 1 1 AN
A0
SO HIGH IMPEDANCE
* Please check the Byte Address Table (Table 5).
Note: Dashed Line = mode (1, 1) - - - - - -
DATA OUT
7 6 5 432 1 0
MSB
Figure 11. RDSR Timing
CS
SCK
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
OPCODE
SI 0 0 0 0 0
SO HIGH IMPEDANCE
Note: Dashed Line = mode (1, 1) - - - - - -
1 01
DATA OUT
7 6 5 4 3 2 10
MSB
© 2007 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
11
Doc. No. 1125 Rev. A
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet CAT15016.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| CAT15016 | (CAT15008 / CAT15016) Voltage Supervisor | Catalyst Semiconductor |
| 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 |