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DS1500 の電気的特性と機能

DS1500のメーカーはDallas Semiconducotrです、この部品の機能は「Y2K Watchdog RTC with Nonvolatile Control」です。


製品の詳細 ( Datasheet PDF )

部品番号 DS1500
部品説明 Y2K Watchdog RTC with Nonvolatile Control
メーカ Dallas Semiconducotr
ロゴ Dallas Semiconducotr ロゴ 




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DS1500 Datasheet, DS1500 PDF,ピン配置, 機能
www.maxim-ic.com
GENERAL DESCRIPTION
The DS1500 is a full-function, year 2000-compliant
real-time clock/calendar (RTC) with an alarm,
watchdog timer, power-on reset, battery monitors,
256 bytes of on-board nonvolatile (NV) SRAM, NV
control for backing up an external SRAM, and a
32.768kHz output. User access to all registers within
the DS1500 is accomplished with a byte-wide
interface, as shown in Figure 7. The RTC registers
contain century, year, month, date, day, hours,
minutes, and seconds data in 24-hour binary-coded
decimal (BCD) format. Corrections for day of month
and leap year are made automatically.
APPLICATIONS
Remote Systems
Battery-Backed Systems
Telecom Switches
Office Equipment
Consumer Electronics
ORDERING INFORMATION
PART
TEMP RANGE PIN-PACKAGE
DS1500YEN -40°C to +85°C 32 TSOP
DS1500WEN -40°C to +85°C 32 TSOP
Selector Guide appears at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
DS1500
Y2K Watchdog RTC with
Nonvolatile Control
FEATURES
§ BCD-Coded Century, Year, Month, Date, Day,
Hours, Minutes, and Seconds with Automatic
Leap-Year Compensation Valid Up to the Year
2100
§ Programmable Watchdog Timer and RTC Alarm
§ Century Register; Y2K-Compliant RTC
§ Automatic Battery Backup and Write Protection
to External SRAM
§ +5V Operation
§ Precision Power-On Reset
§ Power-Control Circuitry Supports System Power-
On from Date/Day/Time Alarm or Key Closure
§ 256 Bytes User NV RAM
§ Auxiliary Battery Input
§ Accuracy Better than ±1 Minute/Month at +25°C
§ Day-of-Week/Date Alarm Register
§ Battery Voltage-Level Indicator Flags
§ Industrial Temperature Range: -40°C to +85°C
PIN CONFIGURATION
TOP VIEW
Dallas
Semiconductor
DS1500
TSOP
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 19
REV: 030603

1 Page





DS1500 pdf, ピン配列
DS1500 Y2KC Watchdog RTC with Nonvolatile Control
DC ELECTRICAL CHARACTERISTICS
(VCC = 0V, TA = -40°C to +85°C.)
PARAMETER
SYMBOL CONDITIONS MIN TYP MAX UNITS
Battery Current, BB32 = 0, EOSC = 0
Battery Current, BB32 = 0, EOSC = 1
VBAUX Current BB32 = 1, SQW Open
IBAT1
IBAT2
IBAUX
(Notes 8, 9)
(Notes 8, 9)
(Notes 8, 9)
0.27 1.0
0.01 0.1
2
µA
µA
µA
CRYSTAL SPECIFICATIONS*
PARAMETER
Nominal Frequency
Series Resistance
Load Capacitance
SYMBOL
fO
ESR
CL
CONDITIONS
MIN TYP MAX UNITS
32.768
kHz
45 k
6 pF
*The crystal, traces, and crystal input pins should be isolated from RF generating signals. Refer to Application Note 58: Crystal Considerations
for Dallas Real-Time Clocks for additional specifications.
AC OPERATING CHARACTERISTICS
(VCCI = 5.0V ±10%, TA = -40°C to +85°C.)
PARAMETER
Read Cycle Time
Address Access Time
CS to DQ Low-Z
CS Access Time
CS Data Off Time
OE to DQ Low-Z (0°C to +85°C)
OE to DQ Low-Z (-40°C to 0°C)
OE Access Time
OE Data Off Time
Output Hold from Address
Write Cycle Time
Address Setup Time
WE Pulse Width
CS Pulse Width
Data Setup Time
Data Hold Time
Address Hold Time
WE Data Off Time
Write Recovery Time
CEI to CEO Propagation Delay
Pulse Width, OE, WE, or CS High
Pulse Width, OE, WE, or CS Low
SYMBOL
tRC
tAA
tCSL
tCSA
tCSZ
tOEL
tOEL
tOEA
tOEZ
tOH
tWC
tAS
tWEW
tCSW
tDS
tDH
tAH
tWEZ
tWR
tCEPD
PWHIGH
PWLOW
CONDITIONS
(Note 10)
(Note 10)
(Note 10)
(Note 10)
(Note 10)
(Note 10)
MIN TYP MAX UNITS
70 ns
70 ns
5 ns
70 ns
25 ns
5 ns
2 ns
35 ns
25 ns
5 ns
70 ns
0 ns
50 ns
55 ns
30 ns
5 ns
0 ns
25 ns
15 ns
10 ns
20 ns
70 ns
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3Pages


DS1500 電子部品, 半導体
Figure 4. Burst Mode Timing Waveform
DS1500 Y2KC Watchdog RTC with Nonvolatile Control
A0–A4
13h
PW LOW
PW HIGH
OE, WE, OR CS
DQ0–DQ7
POWER-UP/DOWN CHARACTERISTICS (Figure 5)
PARAMETER
CS, CEI, or WE at VIH Before Power-Fail
SYMBOL
tPF
CONDITIONS
VCCI Fall Time: VPF(MAX) to VPF(MIN)
tF
VCCI Fall Time: VPF(MIN) to VSO
tFB
VCCI Rise Time: VPF(MIN) to VPF(MAX)
tR
VPF to RST High
tREC
MIN TYP MAX UNITS
0 ms
300 ms
10 ms
0 ms
35 200 ms
CAPACITANCE
(TA = +25°C)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
Capacitance on All Input Pins
CIN
10 pF
Capacitance on IRQ, PWR, RST, and DQ Pins
CIO
10 pF
AC TEST CONDITIONS
OUTPUT LOAD
(Y) 50pF + 1TTL Gate
(W) 25pF + 1 TTL Gate
INPUT PULSE
LEVELS
0V to 3.0V for
5V operation
TIMING MEASUREMENT
REFERENCE LEVELS
Input: 1.5V
Output: 1.5V
INPUT PULSE RISE
AND FALL TIMES
5ns
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6 Page



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共有リンク

Link :


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