DS1251YP-70IND Maxim Integrated Products, DS1251YP-70IND Datasheet

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DS1251YP-70IND

Manufacturer Part Number
DS1251YP-70IND
Description
Real Time Clock
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1251YP-70IND

Function
Clock, Calendar, NV Timekeeping RAM
Rtc Memory Size
524288 B
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Rtc Bus Interface
Phantom Clock, Parallel
Package / Case
PowerCap
Time Format
HH:MM:SS:hh
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
www.maxim-ic.com
FEATURES
 Real-Time Clock Keeps Track of Hundredths
 512k x 8 NV SRAM Directly Replaces
 Embedded Lithium Energy Cell Maintains
 Watch function is Transparent to RAM
 Month and Year Determine the Number of
 Over 10 Years of Data Retention in the
 Full 10% Operating Range
 Lithium Energy Source is Electrically
 DIP Module Only
 PowerCap
 Underwriters Laboratory (UL) Recognized
 Available in Lead-Free Package
PowerCap is a registered trademark of Maxim Integrated Products, Inc.
Of Seconds, Minutes, Hours, Days, Date of
the Month, Months, and Years
Volatile Static RAM or EEPROM
Calendar Operation and Retains RAM data
Operation
Days in Each Month; Valid Up to 2100
Absence of Power
Disconnected to Retain Freshness until
Power is Applied for the First Time
– Standard 32-Pin JEDEC Pinout
– Upward Comparable with the DS1248
(www.maxim-ic.com/qa/info/ul/)
Surface Mountable Package for Direct
Connection to PowerCap Containing
Battery and Crystal
Replaceable Battery (PowerCap)
Pin-for-Pin Compatible with Other
Densities of DS124xP Phantom Clocks
®
Module Board Only
4096k NV SRAM with Phantom Clock
1 of 21
PIN CONFIGURATIONS
TOP VIEW
GND
N.C.
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
DQ7
RST
A15
A16
V
WE
OE
CE
CC
A18/RST
(Uses DS9034PCX PowerCap)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
GND
DQ0
DQ1
DQ2
A16
A14
A12
PowerCap Module Board
A7
A6
A5
A4
A3
A2
A1
A0
Encapsulated Package
X1
DS1251/DS1251P
740-Mil Flush
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DS1251P
GND V
DS1251
BAT
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
X2
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
REV: 071105
V
A15
A17
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
CC
A18
A17
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

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DS1251YP-70IND Summary of contents

Page 1

... Replaceable Battery (PowerCap)  Pin-for-Pin Compatible with Other  Densities of DS124xP Phantom Clocks  Underwriters Laboratory (UL) Recognized (www.maxim-ic.com/qa/info/ul/)  Available in Lead-Free Package PowerCap is a registered trademark of Maxim Integrated Products, Inc. 4096k NV SRAM with Phantom Clock PIN CONFIGURATIONS TOP VIEW A18/RST A16 A14 A12 ...

Page 2

... DS1251Y-70 0°C to +70°C DS1251Y-70+ 0°C to +70°C DS1251YP-70 0°C to +70°C DS1251YP-70+ 0°C to +70°C DS1251YP-70IND -40°C to +85°C DS1251YP-70IND+ -40°C to +85°C + Denotes a lead(Pb)-free/RoHS-compliant device. *DS9034PCX (PowerCap) required. Must be ordered separately. PIN DESCRIPTION PIN NAME EDIP PowerCap 1 1 ...

Page 3

PIN DESCRIPTION (continued) PIN NAME EDIP PowerCap — GND DESCRIPTION The DS1251 4096k NV SRAM with Phantom Clock is a fully static nonvolatile ...

Page 4

The WR write cy cles to avoid bus contention. However, if the output b then will disable the outputs DATA RETENTION MODE ...

Page 5

The next 64 cycles will cause the receive or transmit data on DQ0, depending on the level of th locations outside the memory block can be interleaved with re cognition sequence or data transfer ...

Page 6

PHANTOM CLOCK REGISTER DEFINITION Figure 2 AM/PM/12/24 MODE Bit 7 of the hours register is defined as the 12-hour or 24-hour mode-select bit. When high, the 12-hour mode is selected. In the 12-hour mode, bit 5 is the AM/PM bit ...

Page 7

BATTERY LONGEVITY The DS1251 has a lithium power source that is designed to provide energy for clock activity, and clock and RAM data retention when the V is sufficient to power the DS1251 continuously for the life of the equipment ...

Page 8

ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………………………………………..-0.3V to +6.0V Soldering Temperature Range……………………………………..+260°C for 10 seconds (DIP) (Note 13) This is a stress rating only and functional operation of the device at these or any other conditions ...

Page 9

DC ELECTRICAL CHARACTERISTICS (T = Over the operating range.) (5V) A PARAMETER Input Leakage Current I/O Leakage Current CE  V ≤ Output Current at 2.4V Output Current at 0.4V Standby Current CE = 2.2V Standby Current ...

Page 10

MEMORY AC ELECTRICAL CHARACTERISTICS (T = Over the operating range.) (5V) A PARAMETER Read Cycle Time Access Time OE to Output Valid CE to Output Valid Output Active Output High-Z from Deselection Output Hold from Address ...

Page 11

PHANTOM CLOCK AC ELECTRICAL CHARACTERISTICS (T = Over the operating range.) (5V) A PARAMETER Read Cycle Time CE Access Time OE Access Time CE to Output Low Output Low Output High Output High-Z Read ...

Page 12

MEMORY AC ELECTRICAL CHARACTERISTICS (T = Over the operating range.) (3.3V) A PARAMETER Read Cycle Time Access Time OE to Output Valid CE to Output Valid Output Active Output High-Z from Deselection Output Hold from Address ...

Page 13

POWER-DOWN/POWER-UP TIMING (T = Over the operating range.) (3.3V) A PARAMETER before Power-Down IH V Slew from PF(MAX PF(MIN Slew from PF(MAX) V (CE ...

Page 14

MEMORY READ CYCLE (Note 1) MEMORY WRITE CYCLE 1 (Notes 2, 6, and ...

Page 15

MEMORY WRITE CYCLE 2 (Notes 2 and 8) RESET FOR PHANTOM CLOCK READ CYCLE TO PHANTOM CLOCK ...

Page 16

WRITE CYCLE TO PHANTOM CLOCK POWER-DOWN/POWER-UP CONDITION (5V ...

Page 17

POWER-DOWN/POWER-UP CONDITION (3.3V ...

Page 18

AC TEST CONDITIONS Output Load: 50pF + 1TTL Gate Input Pulse Levels Timing Measurement Reference Levels Input: 1.5V Output: 1.5V Input Pulse Rise and Fall Times: 5ns NOTES high for a read cycle. 2) ...

Page 19

PACKAGE INFORMATION For the latest package outline information and land patterns www.maxim-ic.com/packages. PACKAGE TYPE PACKAGE CODE 32 EDIP MDT32+5 34 PWRCP PC2+5 DS1251P DOCUMENT NO. 21-0245 21-0246 PKG DIM MIN A 0.920 B 0.980 C - 0.052 D ...

Page 20

DS1251P WITH DS9034PCX ATTACHED PKG DIM COMPONENTS AND PLACEMENT MAY VARY FROM EACH DEVICE TYPE INCHES MIN NOM MAX 0.920 0.925 0.930 0.955 0.960 0.965 0.240 0.245 0.250 0.052 0.055 ...

Page 21

... Maxim/Dallas Semiconductor cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim/Dallas Semiconductor product. No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. PKG DIM ...

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