BENEFITS AND FEATURES
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Completely Manages All Timekeeping FunctionsoReal-Time Clock Counts Seconds,
Minutes, Hours, Date of the Month, Month,Day of the Week, and Year with Leap-YearCompensation Valid Up to 2100
o31 x 8 Battery-Backed General-Purpose
RAMSimple Serial Port Interfaces to MostMicrocontrollers
oSimple 3-Wire InterfaceoTTL-Compatible (VCC = 5V)
oSingle-Byte or Multiple-Byte (Burst Mode)
Data Transfer for Read or Write of Clock orRAM DataLow Power Operation Extends Battery BackupRun Time
o2.0V to 5.5V Full OperationoUses Less Than 300nA at 2.0V8-Pin DIP and 8-Pin SO Minimizes RequiredSpace
Optional Industrial Temperature Range: -40°Cto +85°C Supports Operation in a Wide Rangeof Applications
Underwriters Laboratories? (UL) Recognized
PIN CONFIGURATIONS
TOP VIEW VCC2 X1 X2 GND 1 8 VCC1 SCLK I/O CE 2 3 4 DS1302 7 6 5 ?
DIP (300 mils) VCC2 X1 X2 GND 1 2 3 4 DS1302 8 7 6 5 VCC1 SCLK I/O CE ?
SO (208 mils/150 mils) ??
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ORDERING INFORMATION
PART
DS1302+ DS1302N+ DS1302S+ DS1302SN+ DS1302Z+ DS1302ZN+
TEMP RANGE 0°C to +70°C -40°C to +85°C0°C to +70°C -40°C to +85°C0°C to +70°C -40°C to +85°C
PIN-PACKAGE 8 PDIP (300 mils) 8 PDIP (300 mils) 8 SO (208 mils) 8 SO (208 mils) 8 SO (150 mils) 8 SO (150 mils)
TOP MARK* DS1302 DS1302 DS1302S DS1302S DS1302Z DS1302ZN
+Denotes a lead-free/RoHS-compliant package.
*An N anywhere on the top mark indicates an industrial temperature grade device. A + anywhere on the top mark indicates a lead-free device.
UL is a registered trademark of Underwriters Laboratories, Inc.
REV: 3/15
DS1302 Trickle-Charge Timekeeping Chip
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground……………………………………………………………….-0.5Vto +7.0V Operating Temperature Range, Commercial………………………………………………………………….0°C to +70°C Operating Temperature Range, Industrial (IND)……………………………………………………………-40°C to +85°C Storage Temperature Range……………………………………………………………………………..….-55°C to +125°C Soldering Temperature (leads, 10 seconds)………………………………………………………………..………….260°C Soldering Temperature (surface mount)………………………………………………..…….See IPC/JEDEC J-STD-020
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 the absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS
(TA = 0°C to +70°C or TA = -40°C to +85°C.) (Note 1)
PARAMETER
Supply Voltage VCC1, VCC2 Logic 1 Input Logic 0 Input
SYMBOL VCC1, VCC2 VIH VIL
VCC = 2.0V VCC = 5V
CONDITIONS (Notes 2, 10) (Note 2) (Note 2)
MIN 2.0 2.0 -0.3-0.3
TYP 3.3
MAX 5.5 VCC + 0.3 +0.3+0.8
UNITS V V V
DC ELECTRICAL CHARACTERISTICS
(TA = 0°C to +70°C or TA = -40°C to +85°C.) (Note 1)
PARAMETER
Input Leakage I/O Leakage
Logic 1 Output (IOH = -0.4mA) Logic 1 Output (IOH = -1.0mA) Logic 0 Output (IOL = 1.5mA) Logic 0 Output (IOL = 4.0mA) Active Supply Current (Oscillator Enabled) Timekeeping Current (Oscillator Enabled) Standby Current (Oscillator Disabled)
Active Supply Current (Oscillator Enabled) Timekeeping Current (Oscillator Enabled) Standby Current (Oscillator Disabled)
Trickle-Charge Resistors Trickle-Charge Diode Voltage Drop
ILI ILO VOH VOL ICC1A ICC1T ICC1S ICC2A ICC2T ICC2S R1 R2 R3 VTD
VCC = 2.0V VCC = 5V VCC = 2.0V VCC = 5V VCC1 = 2.0V VCC1 = 5V VCC1 = 2.0V VCC1 = 5V VCC1 = 2.0V VCC1 = 5V IND
VCC2 = 2.0V VCC2 = 5V VCC2 = 2.0V VCC2 = 5V VCC2 = 2.0V VCC2 = 5V
2 4 8 0.7
SYMBOL
CONDITIONS (Notes 5, 13) (Notes 5, 13) (Note 2) (Note 2) CH = 0
(Notes 4, 11) CH = 0
(Notes 3, 11,13) CH = 1
(Notes 9, 11, 13) CH = 0
(Notes 4, 12) CH = 0
(Notes 3, 12) CH = 1
(Notes 9, 12)
0.2 0.45 1 1 5
1.6 2.4
0.4 0.4 0.4 1.2 0.3 1 100 100 200 0.425 1.28 25.3 81 25 80
k?
MIN
TYP 85 85
MAX 500 500
UNITS μA μA V V mA μA nA mA μA μA
V
DS1302 Trickle-Charge Timekeeping Chip
CAPACITANCE
(TA = +25°C)
PARAMETER Input Capacitance I/O Capacitance
SYMBOL
CI CI/O
MIN
TYP 10 15
MAX
UNITS pF pF
AC ELECTRICAL CHARACTERISTICS
PARAMETER
Data to CLK Setup CLK to Data Hold CLK to Data Delay CLK Low Time CLK High Time CLK Frequency CLK Rise and Fall CE to CLK Setup CLK to CE Hold CE Inactive Time
CE to I/O High Impedance SCLK to I/O High Impedance
Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8: Note 9: Note 10: Note 11: Note 12: Note 13:
(TA = 0°C to +70°C or TA = -40°C to +85°C.) (Note 1)
SYMBOL VCC = 2.0V tDC
VCC = 5V VCC = 2.0V
tCDH
VCC = 5V VCC = 2.0V
tCDD
VCC = 5V VCC = 2.0V tCL
VCC = 5V VCC = 2.0V tCH
VCC = 5V VCC = 2.0V
tCLK
VCC = 5V VCC = 2.0V
tR, tF
VCC = 5V VCC = 2.0V tCC
VCC = 5V VCC = 2.0V
tCCH
VCC = 5V VCC = 2.0V
tCWH
VCC = 5V VCC = 2.0V
tCDZ
VCC = 5V VCC = 2.0V
tCCZ
VCC = 5V
CONDITIONS (Note 6) (Note 6) (Notes 6, 7, 8) (Note 6) (Note 6) (Note 6)
1000 250 1000 250 DC
0.5 2.0 2000 500
MIN 200 50 280 70
TYP
MAX
UNITS ns ns
800 200
ns ns ns MHz ns μs ns μs
280 70 280 70
ns ns
(Note 6) (Note 6) (Note 6) (Note 6) (Note 6)
4 1 240 60 4 1
Limits at -40°C are guaranteed by design and are not production tested. All voltages are referenced to ground.
ICC1T and ICC2T are specified with I/O open, CE and SCLK set to a logic 0.
ICC1A and ICC2A are specified with the I/O pin open, CE high, SCLK = 2MHz at VCC = 5V; SCLK = 500kHz, VCC = 2.0V. CE, SCLK, and I/O all have 40k? pulldown resistors to ground.
Measured at VIH = 2.0V or VIL = 0.8V and 10ns maximum rise and fall time. Measured at VOH = 2.4V or VOL = 0.4V. Load capacitance = 50pF.
ICC1S and ICC2S are specified with CE, I/O, and SCLK open.
VCC = VCC2, when VCC2 > VCC1 + 0.2V; VCC = VCC1, when VCC1 > VCC2. VCC2 = 0V. VCC1 = 0V.
Typical values are at +25°C.
DS1302 Trickle-Charge Timekeeping Chip
Figure 6. Timing Diagram: Read Data Transfer
CEtCCtRtFSCLKtCLtCDHtDCI/OREAD DATA BYTEtCHtCDDtCCZtCDZADDRESS/COMMAND BYTEFigure 7. Timing Diagram: Write Data Transfer
CEtCWHtCCtRtFtCCHSCLKtCDHI/OtDCtCLtCHADDRESS/COMMAND BYTEWRITE DATA BYTECHIP INFORMATION
TRANSISTOR COUNT: 11,500
THERMAL INFORMATION
PACKAGE 8 DIP
8 SO (150 mils)
THETA-JA (°C/W) 110 170
THETA-JC (°C/W) 40 40
PACKAGE TYPE 8 PDIP 8 SO (208 mils) 8 SO (150 mils) PACKAGE CODE — — — DOCUMENT NO. 21-004321-026221-0041DS1302 Trickle-Charge Timekeeping Chip
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