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Datasheet> All Categories > The embedded processor and controller> Microcontrollers and processors> DS1388Z-33
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DS1388Z-33

Description
REAL TIME CLOCK, PDSO8, 0.150 INCH, SOIC-8
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size1MB，21 Pages
ManufacturerRochester Electronics
Websitehttps://www.rocelec.com/
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DS1388Z-33 Overview

REAL TIME CLOCK, PDSO8, 0.150 INCH, SOIC-8

DS1388Z-33 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerRochester Electronics
Parts packaging codeSOIC
package instructionSOP,
Contacts8
Reach Compliance Codeunknown
maximum clock frequency0.032 MHz
Information access methodsI2C
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity levelNOT SPECIFIED
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)245
Certification statusCOMMERCIAL
Maximum seat height1.75 mm
Maximum supply voltage3.63 V
Minimum supply voltage2.97 V
Nominal supply voltage3.3 V
surface mountYES
technologyCMOS
Temperature levelINDUSTRIAL
Terminal surfaceTIN LEAD
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
uPs/uCs/peripheral integrated circuit typeTIMER, REAL TIME CLOCK

DS1388Z-33 Preview

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Rev 0; 4/05
I
2
C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
General Description
The DS1388 I
2
C real-time clock (RTC), supervisor, and
EEPROM is a multifunction device that provides a
clock/calendar, programmable watchdog timer, power-
supply monitor with reset, and 512 bytes of EEPROM.
The clock provides hundredths of seconds, seconds,
minutes, and hours, and operates in 24-hour or 12-hour
format with an AM/PM indicator. The calendar provides
day, date, month, and year information. The date at the
end of the month is automatically adjusted for months
with fewer than 31 days, including corrections for leap
year. A watchdog timer provides a reset for an unre-
sponsive microprocessor. It is programmable in 10ms
intervals from 0.01 to 99.99 seconds. A temperature-
compensated voltage reference and comparator circuit
monitors the status of V
CC
. If a primary power failure is
detected, the device automatically switches to the
backup supply and drives the reset output to the active
state. The backup supply maintains time and date
operation in the absence of V
CC
. When V
CC
returns to
nominal levels, the reset is held low for a period to allow
the power supply and processor to stabilize. The
device also has a pushbutton reset controller, which
debounces a reset input signal. The device is
accessed through an I
2
C serial interface.
♦
Fast (400kHz) I
2
C Interface
♦
RTC Counts Hundredths of Seconds, Seconds,
Minutes, Hours, Day, Date, Month, and Year with
Leap Year Compensation Valid Up to 2100
♦
Programmable Watchdog Timer
♦
Automatic Power-Fail Detect and Switch Circuitry
♦
Reset Output with Pushbutton Reset Input
Capability
♦
512 x 8 Bits of EEPROM
♦
Integrated Trickle-Charge Capability for Backup
Supply
♦
Three Operating Voltages: 5.0V, 3.3V, and 3.0V
♦
Low Timekeeping Voltage Down to 1.3V
♦
-40°C to +85°C Temperature Range
♦
UL Recognized
Features
DS1388
Ordering Information
PART
DS1388Z-3
DS1388Z-33
DS1388Z-5
DS1388Z-5+
DS1388Z-3+
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
DS1388-3
DS138833
DS1388-5
DS1388-5
DS138833
DS1388-3
Applications
Portable Instruments
Point-of-Sale Equipment
Network Interface Cards
Wireless Equipment
-40°C to +85°C 8 SO (150 mils)
-40°C to +85°C 8 SO (150 mils)
-40°C to +85°C 8 SO (150 mils)
-40°C to +85°C 8 SO (150 mils)
-40°C to +85°C 8 SO (150 mils)
DS1388Z-33+ -40°C to +85°C 8 SO (150 mils)
Pin Configuration
TOP VIEW
A ’+’ symbol near the pin one indicator indicates lead-free.
+ = Lead free.
Typical Operating Circuit
V
CC
V
CC
CRYSTAL
V
CC
X1
1
X2
V
BACKUP
GND
2
3
4
8
V
CC
RST
SCL
SDA
CPU
RPU
RPU
X1
X2
V
CC
DS1388
7
6
5
SCL
SDA
DS1388
RST
V
BACKUP
SO
Purchase of I
2
C components from Maxim Integrated Products,
Inc., or one of its sublicensed Associated Companies, conveys
a license under the Philips I
2
C Patent Rights to use these com-
ponents in an I
2
C system, provided that the system conforms
to the I
2
C Standard Specification as defined by Philips.
GND
RPU = t
r
/C
B
______________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
I
2
C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
DS1388
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V
CC
Pin Relative to Ground .....-0.3V to +6.0V
Voltage Range on Inputs Relative
to Ground ...............................................-0.3V to (V
CC
+ 0.3V)
Operating Temperature Range
(noncondensing) .............................................-40°C to +85°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature .....................See IPC/JEDEC J-STD-020
Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS
(T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage
SYMBOL
V
CC
(Note 2)
CONDITIONS
DS1388Z-5
DS1388Z-33
DS1388Z-3
Logic 1
Logic 0
Pullup Voltage (SCL, SDA),
V
CC
= 0V
V
BACKUP
Voltage
Power-Fail Voltage
V
IH
V
IL
V
PU
V
BACKUP
V
PF
(Note 2)
DS1388Z-5
(Note 2)
DS1388Z-33
DS1388Z-3
1.3
4.15
2.70
2.45
3.0
4.33
2.88
2.60
(Note 2)
(Note 2)
MIN
4.5
2.97
2.7
0.7 x
V
CC
-0.3
TYP
5
3.3
3
MAX
5.5
3.63
3.3
V
CC
+
0.3
+0.3 x
V
CC
5.5
5.5
4.50
2.97
2.70
V
V
V
V
V
V
UNITS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
Trickle-Charger Current-Limiting
Resistors
Input Leakage (SCL)
I/O Leakage (SDA)
I/O Leakage (RST)
SDA Logic 0 Output
(V
OL
= 0.15 x V
CC
)
SYMBOL
R1
R2
R3
I
LI
I
LO
I
LORST
I
OLDOUT
(Note 7)
(Notes 3, 4)
(Note 5)
(Note 6)
-1
-1
-200
CONDITIONS
MIN
TYP
250
2000
4000
+1
+1
+10
3
µA
µA
µA
mA
Ω
MAX
UNITS
2
_____________________________________________________________________
I
2
C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
DC ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
RST
Logic 0 Output
SYMBOL
I
OLSIR
CONDITIONS
V
CC
> 2V; V
OL
= 0.4V
1.8V < V
CC
< 2V; V
OL
= 0.2 x V
CC
1.3V < V
CC
< 1.8V; V
OL
= 0.2 x V
CC
DS1388Z-5
V
CC
Active Current, EEPROM
2
Read, I C Read/Write Access
I
CCER
(Note 8)
DS1388Z-33
DS1388Z-3
DS1388Z-5
V
CC
Active Current, EEPROM
Write Cycle
I
CCEW
(Note 8)
DS1388Z-33
DS1388Z-3
DS1388Z-5
V
CC
Standby Current
I
CCS
(Note 9)
DS1388Z-33
DS1388Z-3
V
BACKUP
Leakage Current
(V
BACKUP
= 3.7V,
V
CC
= V
CC(MAX)
)
EEPROM Write/Erase Cycles
I
BACKUPLKG
T
A
= +25°C (guaranteed by design)
t
WR
T
A
= -40°C to +85°C (guaranteed by
design)
200k
50k
Cycles
15
100
MIN
TYP
MAX
3.0
3.0
250
600
250
225
1.0
0.70
0.65
270
150
140
100
nA
µA
mA
µA
UNITS
mA
µA
DS1388
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 0V, V
BACKUP
= 3.7V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
V
BACKUP
Current, OSC On
(EOSC = 0), SDA = SCL = 0V
V
BACKUP
Current, OSC Off
(EOSC = 1), SDA = SCL = 0V
(Data Retention)
SYMBOL
I
BACKUP
(Note 10)
CONDITIONS
MIN
TYP
410
MAX
550
UNITS
nA
I
BACKUPDR
(Note 10)
10
100
nA
_____________________________________________________________________
3
I
2
C RTC/Supervisor with Trickle Charger
and 512 Bytes EEPROM
DS1388
AC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SCL Clock Frequency
Bus Free Time Between a STOP
and START Condition
Hold Time (Repeated) START
Condition (Note 11)
LOW Period of SCL Clock
HIGH Period of SCL Clock
Setup Time for a Repeated
START Condition
Data Hold Time (Notes 12, 13)
Data Setup Time (Note 14)
Rise Time of Both SDA and SCL
Signals (Note 15)
Fall Time of Both SDA and SCL
Signals (Note 15)
Setup Time for STOP Condition
Capacitive Load for Each Bus
Line (Note 15)
I/O Capacitance (SDA, SCL,
RST)
Pushbutton Debounce
Reset Active Time
EEPROM Write Cycle Time
Oscillator Stop Flag (OSF) Delay
(Note 16)
SYMBOL
f
SCL
t
BUF
t
HD:STA
t
LOW
t
HIGH
t
SU:STA
t
HD:DAT
t
SU:DAT
t
R
t
F
t
SU:STO
C
B
C
I/O
PB
DB
t
RST
t
WEE
t
OSF
+25°C
160
160
8
20
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
Fast mode
Standard mode
CONDITION
MIN
100
0
1.3
4.7
0.6
4.0
1.3
4.7
0.6
4.0
0.6
4.7
0
0
100
250
20 +
0.1C
B
20 +
0.1C
B
0.6
4.0
400
10
180
180
10
300
1000
300
300
0.9
TYP
MAX
400
100
UNITS
kHz
µs
µs
µs
µs
µs
µs
ns
ns
ns
µs
pF
pF
ms
ms
ms
ms
4
_____________________________________________________________________
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DS1388Z-33 Related Products

DS1388Z-33 DS1388Z-3 DS1388Z-5
Description REAL TIME CLOCK, PDSO8, 0.150 INCH, SOIC-8 REAL TIME CLOCK, PDSO8, 0.150 INCH, SOIC-8 REAL TIME CLOCK, PDSO8, 0.150 INCH, SOIC-8
Is it lead-free? Contains lead Contains lead Contains lead
Is it Rohs certified? incompatible incompatible incompatible
Maker Rochester Electronics Rochester Electronics Rochester Electronics
Parts packaging code SOIC SOIC SOIC
package instruction SOP, SOP, SOP,
Contacts 8 8 8
Reach Compliance Code unknown unknown unknown
maximum clock frequency 0.032 MHz 0.032 MHz 0.032 MHz
Information access methods I2C I2C I2C
JESD-30 code R-PDSO-G8 R-PDSO-G8 R-PDSO-G8
JESD-609 code e0 e0 e0
length 4.9 mm 4.9 mm 4.9 mm
Humidity sensitivity level NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
Number of terminals 8 8 8
Maximum operating temperature 85 °C 85 °C 85 °C
Minimum operating temperature -40 °C -40 °C -40 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code SOP SOP SOP
Package shape RECTANGULAR RECTANGULAR RECTANGULAR
Package form SMALL OUTLINE SMALL OUTLINE SMALL OUTLINE
Peak Reflow Temperature (Celsius) 245 245 245
Certification status COMMERCIAL COMMERCIAL COMMERCIAL
Maximum seat height 1.75 mm 1.75 mm 1.75 mm
Maximum supply voltage 3.63 V 3.3 V 5.5 V
Minimum supply voltage 2.97 V 2.7 V 4.5 V
Nominal supply voltage 3.3 V 3 V 5 V
surface mount YES YES YES
technology CMOS CMOS CMOS
Temperature level INDUSTRIAL INDUSTRIAL INDUSTRIAL
Terminal surface TIN LEAD TIN LEAD TIN LEAD
Terminal form GULL WING GULL WING GULL WING
Terminal pitch 1.27 mm 1.27 mm 1.27 mm
Terminal location DUAL DUAL DUAL
Maximum time at peak reflow temperature NOT SPECIFIED NOT SPECIFIED NOT SPECIFIED
width 3.9 mm 3.9 mm 3.9 mm
uPs/uCs/peripheral integrated circuit type TIMER, REAL TIME CLOCK TIMER, REAL TIME CLOCK TIMER, REAL TIME CLOCK

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