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DS28DG02E-3C+ Datasheet

  • DS28DG02E-3C+

  • 2kb SPI EEPROM with PIO, RTC, Reset, Battery Monitor, and Wa...

  • 293.89KB

  • 33頁

  • DALLAS   DALLAS

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EV KIT AVAILABLE
DS28DG02
2kb SPI EEPROM with PIO, RTC,
Reset, Battery Monitor, and Watchdog
www.maxim-ic.com
GENERAL DESCRIPTION
The DS28DG02 combines 2kb (256 x 8) EEPROM
with 12 PIO lines, a real-time clock (RTC) and
calendar with alarm function, a CPU reset monitor, a
battery monitor, and a watchdog. Communication
with the device is accomplished with an industry-
standard SPI鈩?interface. The user EEPROM is
organized as four blocks of 64 bytes each with
single-byte and up to 16-byte page write capability.
Additional registers provide access to PIOs and to
setup functions. Individual PIO lines can be
configured as inputs or outputs. The power-on state
of PIOs programmed as outputs is stored in
nonvolatile (NV) memory. All PIOs may be
reconfigured by the user through the serial interface.
The RTC/calendar operates in the 12/24-hour format
and automatically corrects for leap years. Battery
monitor threshold and watchdog timeout are user-
programmable through NV registers. The reset
monitor generates a reset to the CPU if the voltage at
the V
CC
pin falls below the factory-set limit. The reset
output includes a debounce circuit for manual
pushbutton reset.
FEATURES
2kb (256 x 8) EEPROM Organized in Four
64-Byte Blocks
Single Byte and Up to 16-Byte EEPROM Write
Sequences
EEPROM Write-Protect Control Pin Protects
1, 2, or All 4 Blocks
Endurance 200k Cycles per Page at +25擄C;
10ms (max) EEPROM Write Cycle
SPI Serial Interface Supporting Modes (0,0)
and (1,1) at Up to 2MHz Clock Frequency
12 PIO Lines with LED Drive Capability
Each PIO is Configured to Input or Output,
Open-Drain/Push-Pull on Startup by Stored
Value
All PIOs are Reconfigurable After Startup
RTC/Calendar/Alarm with BCD Format and
Leap-Year Compensation
RTC Controlled Through 32.768kHz, 12.5pF
Crystal or External TCXO
CPU Reset Through Fast-Response Precision
V
CC
Monitor with Hysteresis or Pushbutton
Battery Monitor 2.5V, 2.25V, 2.0V, 1.75V, -5%
Watchdog Timer 1.6s, 0.8s, 0.4s, 0.2s (typ)
Unique Factory-Programmed 64-Bit Device
Registration Number
Operating Range: 2.2V to 5.25V,
-40擄C to +85擄C
鹵4kV IEC 1000-4-2 ESD Protection Level
(Except Crystal Pins)
Available in 28-Lead, 4.4mm TSSOP or
36-Lead 6mm 脳 6mm QFN Package
APPLICATIONS
Asset-Tracking Systems
Broadband Access Network Equipment
Patient-Monitoring Systems
Home Lighting Control Systems
Holter Heart Monitors
Typical Operating Circuit appears on page 32.
Pin Configuration appears on page 33.
ORDERING INFORMATION
PART
DS28DG02E-3C+
DS28DG02E-3C+T
DS28DG02G-3C+
DS28DG02G-3C+T
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
V
CC
TRIP
3.3V -5%
3.3V -5%
3.3V -5%
3.3V -5%
PIN-PACKAGE
28 TSSOP-EP
*
(4.4mm)
28 TSSOP-EP
*
T&R
36 TQFN-EP
*
(6mm 脳 6mm)
36 TQFN-EP
*
T&R
PKG CODE
U28E+5
U28E+5
T3666+3
T3666+3
*EP = Exposed Paddle.
+ Denotes lead-free/RoHS compliant device.
For additional V
CC
monitor trip points or other device options, contact the factory.
Note:
Registers are capitalized for clarity.
SPI is a trademark of Motorola, Inc.
Note:
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here:
www.maxim-ic.com/errata.
1 of 33
REV: 061907

DS28DG02E-3C+ 產(chǎn)品屬性

  • 62

  • 集成電路 (IC)

  • 存儲器

  • -

  • EEPROMs - 串行

  • EEPROM

  • 2K (256 x 8)

  • 2MHz

  • SPI 3 線串行

  • 2.2 V ~ 5.25 V

  • -40°C ~ 85°C

  • 28-SOIC（0.173"，4.40mm 寬）裸露焊盤

  • 28-TSSOP 裸露焊盤

  • 管件

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