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參數(shù)資料
| 型號： | DS3234S#T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 15/21頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC W/TCXO 20-SOIC |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1,000 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，NVSRAM，方波輸出，TCXO/晶體 |
| 存儲容量： | 256B |
| 時間格式： | HH:MM:SS（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 電源電壓： | 2 V ~ 5.5 V |
| 電壓 - 電源，電池： | 2 V ~ 3.8 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-SOIC W |
| 包裝： | 帶卷 (TR) |
DS3234
Extremely Accurate SPI Bus RTC with
Integrated Crystal and SRAM
_____________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 2.0V to 5.5V, VCC = active supply (see Table 1), TA = -40°C to +85°C, unless otherwise noted.) (Typical values are at VCC =
3.3V, VBAT = 3.0V, and TA = +25°C, unless otherwise noted. TCXO operation guaranteed from 2.3V to 5.5V on VCC and 2.3V to 3.8V on
VBAT.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Logic 0 Output, 32kHz
VOL
IOL = 1mA
0.4
V
Logic 1 Output, DOUT
VOH
IOH = -1.0mA
0.85 x VCC
V
Logic 0 Output, DOUT, INT/SQW
VOL
IOL = 3mA
0.4
V
Logic 0 Output, RST
VOL
IOL = 1.0mA
0.4
V
Output Leakage Current 32kHz,
INT/SQW, DOUT
ILO
Output high impedance
-1
0
+1
A
Input Leakage DIN, CS, SCLK
ILI
-1
+1
A
RST Pin I/O Leakage
IOL
RST high impedance (Note 6)
-200
+10
A
TCXO (VCC = 2.3V to 5.5V, VBAT = 2.3V to 3.8V, TA = -40
°C to +85°C, unless otherwise noted.) (Notes 2 and 3)
Output Frequency
fOUT
VCC = 3.3V or VBAT = 3.3V
32.768
kHz
0°C to +40°C
-2
+2
Frequency Stability vs.
Temperature
Δf/fOUT
VCC = 3.3V or
VBAT = 3.3V
-40°C to 0°C and
+40°C to +85°C
-3.5
+3.5
ppm
Frequency Stability vs. Voltage
Δf/V
1
ppm/V
-40°C
0.7
+25°C
0.1
+70°C
0.4
Trim Register Frequency
Sensitivity per LSB
Δf/LSB
Specified at:
+85°C
0.8
ppm
Temperature Accuracy
Temp
-3
+3
°C
First year
±1.0
Crystal Aging
Δf/fOUT
After reflow,
not production tested
0–10 years
±5.0
ppm
ELECTRICAL CHARACTERISTICS
(VCC = 0V, VBAT = 2.0V to 3.8V, TA = -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
VBAT = 3.4V
1.5
2.3
Timekeeping Battery Current
(Note 5)
IBATT
EOSC = 0, BBSQW = 0,
CRATE1 = CRATE0 = 0
VBAT = 3.8V
2.5
A
Temperature Conversion Current
IBATTC
EOSC = 0, BBSQW = 0
400
A
Data-Retention Current
IBATTDR
EOSC = 1
100
nA
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