DS1643-100 Maxim Integrated Products, DS1643-100 Datasheet

IC RAM TIMEKEEP NV 100NS 28-EDIP

DS1643-100

Manufacturer Part Number
DS1643-100
Description
IC RAM TIMEKEEP NV 100NS 28-EDIP
Manufacturer
Maxim Integrated Products
Type
Clock/Calendar/NVSRAMr
Datasheet

Specifications of DS1643-100

Memory Size
64K (8K x 8)
Time Format
HH:MM:SS (24 hr)
Date Format
YY-MM-DD-dd
Interface
Parallel
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
28-DIP Module (600 mil), 28-EDIP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
DS1643100

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FEATURES
ORDERING INFORMATION
DS1643-85+
DS1643-100+
DS1643P-85+
DS1643P-100+
*
+Denotes a lead(Pb)-free/RoHS-compliant package. The top mark will include a “+” symbol on lead-free devices.
www.maxim-ic.com
 Integrated NV SRAM, Real-Time Clock,
 Clock Registers are Accessed Identically to the
 Totally Nonvolatile with Over 10 Years of
 Access Times of 85ns and 100ns
 BCD-Coded Year, Month, Date, Day, Hours,
 Power-Fail Write Protection Allows for ±10%
 Lithium Energy Source is Electrically
 DS1643 Only (DIP Module)
 UL Recognized
 DS1643P Only (PowerCap Module Board)
DS9034I-PCX+ and DS9034-PCX+ required (must be ordered separately).
19-5058; Rev 5/10
Crystal, Power-Fail Control Circuit and
Lithium Energy Source
Static RAM. These Registers Reside in the
Eight Top RAM Locations.
Operation in the Absence of Power
Minutes, and Seconds with Leap Year
Compensation Valid Up to 2100
V
Disconnected to Retain Freshness Until Power
is Applied for the First Time
Surface Mountable Package for Direct
Replaceable Battery (PowerCap)
Power-Fail Output
Pin-for-Pin Compatible with Other Densities of
Standard JEDEC Byte-Wide 8K x 8 RAM
CC
PART
Power Supply Tolerance
Connection to PowerCap Containing
Battery and Crystal
DS164XP Timekeeping RAM
Pinout
VOLTAGE RANGE
(V)
5.0
5.0
5.0
5.0
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
1 of 17
Nonvolatile Timekeeping RAMs
PIN CONFIGURATIONS
TOP VIEW
GND
N.C.
N.C.
N.C.
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
PFO
V
OE
CE
WE
CC
PIN-PACKAGE
28 EDIP (0.740)
28 EDIP (0.740)
34-PowerCap*
34-PowerCap*
(Uses DS9034PCX PowerCap)
GND
DQ0
DQ1
DQ2
A12
N.C.
A7
A6
A5
A4
A3
A2
A1
A0
PowerCap Module Board
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
(700-mil Extended)
Encapsulated DIP
X1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
DS1643/DS1643P
DS1643
GND V
DS1643P
BAT
28
27
26
25
24
23
22
21
20
19
18
17
16
15
TOP MARK
DS1643+85
DS1643+100
DS1643P+85
DS1643P+100
X2
V
WE
CE2
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
CC
34
33
28
25
24
23
21
20
19
18
32
31
30
29
27
26
22
N.C.
N.C.
N.C.
N.C.
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

Related parts for DS1643-100

DS1643-100 Summary of contents

Page 1

... Pin-for-Pin Compatible with Other Densities of DS164XP Timekeeping RAM ORDERING INFORMATION VOLTAGE RANGE PART DS1643-85+ DS1643-100+ DS1643P-85+ DS1643P-100+ * DS9034I-PCX+ and DS9034-PCX+ required (must be ordered separately). +Denotes a lead(Pb)-free/RoHS-compliant package. The top mark will include a “+” symbol on lead-free devices. Nonvolatile Timekeeping RAMs ...

Page 2

... V No Connection Address Inputs Data Input/Output Active-Low Chip-Enable Input Active-Low Output-Enable Input Chip-Enable 2 Input (Active High) Active-Low Write-Enable Input Power-Supply Input CC Active-Low Power-Fail Output. This open-drain pin requires a pullup resistor for proper operation. Ground Crystal Connection, Battery Connection BAT DS1643/DS1643P FUNCTION ...

Page 3

... DESCRIPTION The DS1643 nonvolatile static RAM with a full function Real Time Clock (RTC) that are both accessible in a byte-wide format. The nonvolatile timekeeping RAM is functionally equivalent to any JEDEC standard SRAM. The device can also be easily substituted in ROM, EPROM and EEPROM sockets providing read/write nonvolatility and the addition of the real time clock function. The real time clock information resides in the eight uppermost RAM locations ...

Page 4

... The 8-bit of the control register is the write bit. Setting the write bit like the read bit, halts updates to the DS1643 registers. The user can then load them with the correct day, date and time data in 24 hour BCD format. Resetting the write bit then transfers those values to the actual clock counters and allows normal operation to resume ...

Page 5

... CLOCK ACCURACY (DIP MODULE) The DS1643 is guaranteed to keep time accuracy to within 1 minute per month at 25C. CLOCK ACCURACY (POWERCAP MODULE) The DS1643P and DS9034PCX are each individually tested for accuracy. Once mounted together, the module is guaranteed to keep time accuracy to within 1.53 minutes per month (35ppm) at 25C. ...

Page 6

... The DS1643 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 DS1643 continuously for the life of the equipment in which it is installed. For specification purposes, the life expectancy is 10 years at 25C with the internal clock oscillator running in the absence of V power ...

Page 7

... Output Leakage Current (Any Output) Output Logic 1 Voltage (I = -1.0mA) OUT Output Logic 0 Voltage (I = +2.1mA) OUT Write Protection Voltage SYMBOL MIN TYP V 4 -0.3 IL SYMBOL MIN TYP CC1 I 1 CC2 2 4.25 4. DS1643/DS1643P MAX UNITS NOTES 5 0 +0.8 V MAX UNITS NOTES A +1  0 ...

Page 8

... Access Time OE Data Off Time OE Output Hold from Address READ CYCLE TIMING DIAGRAM 85ns SYMBOL ACCESS MIN MAX CEL t 85 CEA t 95 CE2A t 30 CEZ t 5 OEL t 45 OEA t 30 OEZ DS1643/DS1643P 100ns ACCESS UNITS NOTES MIN MAX 100 ns 100 100 ns 105 ...

Page 9

... Pulse Width WE Pulse Width CE CE2 Pulse Width Data Setup Time Data Hold Time Address Hold Time Data Off Time WE Write Recovery Time 85ns SYMBOL ACCESS MIN MAX WEW t 70 CEW t 75 CE2W WEZ DS1643/DS1643P 100ns ACCESS UNITS NOTES MIN MAX 100 ...

Page 10

... WRITE CYCLE TIMING DIAGRAM—WE CONTROLLED WRITE CYCLE TIMING DIAGRAM— , CE2 CONTROLLED DS1643/DS1643P ...

Page 11

... Power-Up Recover Time Expected Data Retention Time (Oscillator On) POWER-UP/POWER-DOWN TIMING CAPACITANCE (T = +25C) A PARAMETER Capacitance on All Pins Capacitance on All Output Pins SYMBOL MIN TYP 300 REC SYMBOL MIN TYP DS1643/DS1643P MAX UNITS NOTES s s s  years 5, 6 MAX UNITS NOTES ...

Page 12

... The CE2 control signal functions exactly the same as the active and inactive levels are opposite. 5) Data retention time is at 25C. 6) Each DS1643 has a built-in switch that disconnects the lithium source until V user. The expected t is defined for DIP modules as a cumulative time in the absence from the time power is first applied by the user ...

Page 13

... DS1643 28-PIN PACKAGE PKG 28-PIN DIM MIN A IN. 1.470 MM 37.34 B IN. 0.675 MM 17.75 C IN. 0.315 MM 8.51 D IN. 0.075 MM 1.91 E IN. 0.015 MM 0.38 F IN. 0.140 MM 3.56 G IN. 0.090 MM 2.29 H IN. 0.590 MM 14.99 J IN. 0.010 MM 0.25 K IN. 0.015 MM 0. DS1643/DS1643P MAX 1.490 37.85 ...

Page 14

... SECONDS. TO SOLDER, APPLY FLUX TO THE PAD, HEAT THE LEAD FRAME PAD AND APPLY SOLDER. TO REMOVE THE PART, APPLY FLUX, HEAT THE LEAD FRAME PAD UNTIL THE SOLDER REFLOWS AND USE A SOLDER WICK TO REMOVE SOLDER DS1643/DS1643P MAX 0.930 0.990 - 0.080 0.058 0.052 ...

Page 15

... DS1643P WITH DS9034PCX ATTACHED PKG INCHES DIM MIN NOM A 0.920 0.925 B 0.955 0.960 C 0.240 0.245 D 0.052 0.055 E 0.048 0.050 F 0.015 0.020 G 0.020 0.025 DS1643/DS1643P MAX 0.930 0.965 0.250 0.058 0.052 0.025 0.030 ...

Page 16

... RECOMMENDED POWERCAP MODULE LAND PATTERN PKG INCHES DIM MIN NOM A - 1.050 B - 0.826 C - 0.050 D - 0.030 E - 0.112 DS1643/DS1643P MAX - - - - - ...

Page 17

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc. DS1643/DS1643P PAGES CHANGED ...

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