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參數(shù)資料
| 型號(hào)： | BQ4802LYDWR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | XO, clock |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁(yè)數(shù)： | 2/24頁(yè) |
| 文件大?。?/td> | 481K |
| 代理商： | BQ4802LYDWR |
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bq4802Y
bq4802LY
SLUS464C – AUGUST 2000 – REVISED JUNE 2002
www.ti.com
10
POWER-DOWN/POWER-UP TIMING (TA = TOPR)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tF
VCC slew rate fall time
3.0 V to 0 V
300
tR
VCC slew rate rise time
VSO to VPDF(max)
100
t
Interrupt delay time from V
bq4802Y
6
24
s
tPF
Interrupt delay time from VPFD
bq4802LY
10
40
s
t
Write protect time for external SRAM
bq4802Y
See Note 1
90
100
125
tWPT
Write-protect time for external SRAM
bq4802LY
See Note 1
150
170
210
t
CS at V
after power up
bq4802Y
See Note 2
100
200
300
tCSR
CS at VHI after power-up
bq4802LY
See Note 2
170
330
500
ms
tRST
VPFD to RST active (reset active time-out period)
tCSR
ms
tCER
Device enable recovery time
See Note 3
tCSR
t
Device enable propagation delay time to external SRAM
bq4802Y
Output load A
9
15
ns
tCED
Device enable propagation delay time to external SRAM
bq4802LY
Output load A
15
25
ns
tPBL
Push-button low time
1
s
(1) Delay after VCC slews down past VPFD before SRAM is write protected and RST activated.
(2) Internal write-protection period after VCC passes VPFD on power up.
(3) Time during which external SRAM is write protected after VCC passes VPFD on power up.
CAUTION:NEGATIVE UNDERSHOOTS BELOW THE ABSOLUTE MAXIMUM RATING OF –0.3 V IN BATTERY-
BACKUP MODE MAY AFFECT DATA INTEGRITY.
VPFD
VCC
2.8
VCC
CS
RST
CEIN
CEOUT
INT
VPFD
tF
tFS
VSO
VPFD(max)
tR
tCSR
tCER
tCED
tPF
VOHB
High-Z
tRST
tWPT
NOTES: A. PWRIE set to 1 to enable power fail interrupt.
B. RST and INT are open drain and require and external pullup resistor.
Figure 9. Power-Down/Power-Up Timing Diagram
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ4802LYDWRG4 | 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPW | 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPWG4 | 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPWR | 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| BQ4802LYPWRG4 | 功能描述:實(shí)時(shí)時(shí)鐘 Parallel RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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