X51638S8 INTERSIL [Intersil Corporation], X51638S8 Datasheet

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X51638S8

Manufacturer Part Number
X51638S8
Description
CPU Supervisor with 16Kbit SPI EEPROM Description
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet
CPU Supervisor with 16Kbit SPI EEPROM
Description
These devices combine four popular functions, Power-on
Reset Control, Watchdog Timer, Supply Voltage Supervision,
and Block Lock Protect Serial EEPROM Memory in one
package. This combination lowers system cost, reduces
board space requirements, and increases reliability.
Applying power to the device activates the power-on reset
circuit which holds RESET/RESET active for a period of
time. This allows the power supply and oscillator to stabilize
before the processor can execute code.
The Watchdog Timer provides an independent protection
mechanism for microcontrollers. When the microcontroller
fails to restart a timer within a selectable time out interval, the
device activates the RESET/RESET signal. The user selects
the interval from three preset values. Once selected, the
interval does not change, even after cycling the power.
The device’s low V
system from low voltage conditions, resetting the system when
V
asserted until V
stabilizes. Five industry standard V
available, however, Intersil’s unique circuits allow the
threshold to be reprogrammed to meet custom requirements
or to fine-tune the threshold for applications requiring higher
precision.
Pinouts
CC
falls below the minimum V
CS/WDI
CC
V
WP
SO
SS
CC
returns to proper operating level and
detection circuitry protects the user’s
1
2
3
4
8-LEAD SOIC/PDIP
®
X5163, X5165
X5163, X5165
CC
1
trip point. RESET/RESET is
TRIP
Data Sheet
thresholds are
8
7
6
5
V
RESET/RESET
SCK
SI
CC
1-888-INTERSIL or 1-888-352-6832
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
Features
• Selectable watchdog timer
• Low V
• Determine watchdog or low voltage reset with a volatile
• Long battery life with low power consumption
• 16Kbits of EEPROM
• Built-in inadvertent write protection
• 2MHz SPI interface modes (0,0 & 1,1)
• Minimize EEPROM programming time
• 2.7V to 5.5V and 4.5V to 5.5V power supply operation
• Available packages
CS/WDI
- Five standard reset threshold voltages
- Re-program low V
- Reset signal valid to V
flag bit
- <50µA max standby current, watchdog on
- <1µA max standby current, watchdog off
- <400µA max active current during read
- Power-up/power-down protection circuitry
- Protect 0, 1/4, 1/2 or all of EEPROM array with Block
- In circuit programmable ROM mode
- 32-byte page write mode
- Self-timed write cycle
- 5ms write cycle time (typical)
- 14-lead TSSOP, 8-lead SOIC
special programming sequence
Lock
V
WP
SO
NC
NC
NC
SS
All other trademarks mentioned are the property of their respective owners.
CC
May 16, 2005
|
detection and reset assertion
protection
Intersil (and design) is a registered trademark of Intersil Americas Inc.
14-LEAD TSSOP
1
2
3
4
5
6
7
X5163, X5165
Copyright Intersil Americas Inc. 2005. All Rights Reserved
CC
14
13
12
11
10
9
8
reset threshold voltage using
CC
= 1V
V
RESET/RESET
NC
NC
NC
SCK
SI
X5163, X5165
CC
FN8128.1

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X51638S8 Summary of contents

Page 1

Data Sheet CPU Supervisor with 16Kbit SPI EEPROM Description These devices combine four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock Protect Serial EEPROM Memory in one package. This combination lowers system cost, reduces ...

Page 2

Block Diagram WP SI Data Register SO Command SCK Decode & Control CS/WDI Logic V Threshold CC Reset Logic V CC Pin Description PIN (SOIC/PDIP) PIN TSSOP NAME 1 1 CS/WDI ...

Page 3

Principles Of Operation Power-on Reset Application of power to the X516, /X5165 activates a Power- on Reset Circuit. This circuit goes active at 1V and pulls the RESET/RESET pin active. This signal prevents the system microprocessor from starting to operate ...

Page 4

NEW V APPLIED = CC OLD V APPLIED + ERROR CC ERROR > -EMAX EMAX = MAXIMUM DESIRED ERROR FIGURE 3. V 4.7K V TRIP + ADJ. PROGRAM 4 X5163, X5165 V PROGRAMMING TRIP EXECUTE RESET V TRIP SEQUENCE SET ...

Page 5

SPI Serial Memory The memory portion of the device is a CMOS Serial EEPROM array with Intersil’s block lock protection. The array is internally organized The device features a Serial Peripheral Interface (SPI) and software protocol allowing ...

Page 6

The Write Enable Latch (WEL) bit indicates the Status of the Write Enable Latch. When WEL = 1, the latch is set HIGH and when WEL = 0 the latch is reset LOW. The WEL bit is a volatile, read ...

Page 7

When WP is HIGH, all functions, including nonvolatile writes to the Status Register operate normally. Setting the WPEN bit in the Status Register to “0” blocks the WP pin function, allowing writes to the Status Register when WP is HIGH ...

Page 8

SCK INSTRUCTION SI HIGH IMPEDANCE SO FIGURE 6. READ STATUS REGISTER SEQUENCE CS SCK SI HIGH IMPEDANCE SO FIGURE 7. WRITE ENABLE LATCH SEQUENCE SCK INSTRUCTION ...

Page 9

CS 0 SCK SI HIGH IMPEDANCE SO Symbol Table WAVEFORM INPUTS OUTPUTS MUST BE WILL BE STEADY STEADY MAY CHANGE WILL CHANGE FROM FROM HIGH HIGH MAY CHANGE WILL CHANGE FROM HIGH TO FROM ...

Page 10

Absolute Maximum Ratings Temperature under bias . . . . . . . . . . . . . . . . . . . . . . . .-65 to +135°C Storage temperature . . . . . . ...

Page 11

OUTPUT RESET/RESET 1.64kΩ 100pF FIGURE 10. EQUIVALENT A.C. LOAD CIRCUIT Electrical Specifications Serial Input Timing SYMBOL f Clock Frequency SCK t Cycle Time CYC t CS Lead Time LEAD t CS Lag Time LAG ...

Page 12

AC Electrical Specifications Serial Output Timing SYMBOL f Clock Frequency SCK t Output Disable Time DIS t Output Valid from Clock Low V t Output Hold Time HO (3) t Output Rise Time RO (3) t Output Fall Time FO ...

Page 13

RESET Output Timing SYMBOL V Reset Trip Point Voltage, X5163-4.5A, X5163-4.5A TRIP Reset Trip Point Voltage, X5163, X5165 Reset Trip Point Voltage, X5163-2.7A, X5165-2.7A Reset Trip Point Voltage, X5163-2.7, X5165-2 Hysteresis (HIGH to LOW vs. LOW to HIGH ...

Page 14

TRIP t VPS SCK FIGURE 13 TRIP VPS SCK FIGURE 14 X5163, X5165 t THD t TSU ...

Page 15

V Programming Specifications: V TRIP PARAMETER t SCK V Program Voltage Setup time VPS TRIP t SCK V Program Voltage Hold time VPH TRIP t V Program Pulse Width P TRIP t V Level Setup time TSU TRIP t V ...

Page 16

WATCHDOG TIMER WATCHDOG TIMER WATCHDOG TIMER OFF ( -40 25 TEMP (°C) FIGURE 15. V SUPPLY CURRENT VS. TEMPERATURE (I CC 5.025 5.000 4.975 ...

Page 17

Packaging Information 8-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S PIN 1 INDEX 0.010 (0.25) 0.020 (0.50) 0° - 8° 0.016 (0.410) 0.037 (0.937) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 17 X5163, X5165 PIN 1 0.014 ...

Page 18

Packaging Information 0° - 8° SEE DETAIL “A” NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 18 X5163, X5165 14-LEAD PLASTIC, TSSOP, PACKAGE TYPE V .025 (.65) BSC .169 (4.3) .177 (4.5) .193 (4.9) .200 (5.1) .047 (1.20) .0075 ...

Page 19

... X5163V14-2.7T1 -40°C - 85°C X5163V14I-2.7 PART NUMBER RESET (ACTIVE HIGH) X5163P-4.5A X5163PI-4.5A X5165PI-4.5A X5165S8-4.5A X5165S8I-4.5A X5165V14-4.5A X5165V14I-4.5A X5163P X5165P X5163PI X5165PI X5163S8 X5165S8 X51638S8 X5163S8T1 X5165S8T1 X5163S8T2 X5163S8I X5165S8I X5163S8IT1 X5165S8IT1 X5163V14 X5165V14 X5163V14T1 X5165V14T1 X5163V14I X5165V14I X5163V14IT1 X5165V14IT1 X5163P-2.7A X5165P-2.7A X5163PI-2 ...

Page 20

Part Mark Information X5163, X51665 W X All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the ...

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