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BQ4285LS

更新时间： 2024-09-09 21:53:31
品牌 Logo 应用领域
德州仪器 - TI 外围集成电路光电二极管时钟
页数 文件大小 规格书
32页 1565K
描述
Enhanced RTC With NVRAM Control

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中文翻译

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BQ4285LS 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOIC-24针数：24
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.87
Is Samacsys：N最大时钟频率：0.032 MHz
外部数据总线宽度：8信息访问方法：PARALLEL, MUXED BUS
中断能力：YJESD-30 代码：R-PDSO-G24
长度：15.4 mm端子数量：24
计时器数量：1最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP24,.4
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：NOT SPECIFIED电源：3.15 V
认证状态：Not Qualified座面最大高度：2.65 mm
子类别：Timer or RTC最大供电电压：3.6 V
最小供电电压：2.7 V标称供电电压：3.15 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
最短时间：SECONDS处于峰值回流温度下的最长时间：NOT SPECIFIED
易失性：YES宽度：7.5 mm
uPs/uCs/外围集成电路类型：TIMER, REAL TIME CLOCKBase Number Matches：1

BQ4285LS 数据手册

 浏览型号BQ4285LS的Datasheet PDF文件第2页浏览型号BQ4285LS的Datasheet PDF文件第3页浏览型号BQ4285LS的Datasheet PDF文件第4页浏览型号BQ4285LS的Datasheet PDF文件第5页浏览型号BQ4285LS的Datasheet PDF文件第6页浏览型号BQ4285LS的Datasheet PDF文件第7页 
bq4285E/L  
Enhanced RTC With NVRAM Control  
➤ BCD or binary format for clock  
General Description  
and calendar data  
Features  
➤ Direct clock/calendar replace-  
ment for IBM® AT-compatible  
computers and other applications  
The CMOS bq4285E/L is a low-power  
microprocessor peripheral providing a  
time-of-day clock and 100-year calen-  
dar with alarm features and battery  
operation. Other features include  
three maskable interrupt sources,  
square wave output, and 114 bytes of  
general nonvolatile storage.  
➤ Calendar in day of the week, day  
of the month, months, and years,  
with automatic leap-year adjust-  
ment  
➤ 114 bytes of general nonvolatile  
storage  
➤ Time of day in seconds, minutes,  
and hours  
➤ Enhanced features include:  
- 12- or 24-hour format  
- System wake-up capability—  
alarm interrupt output active  
in battery-backup mode  
- Optional daylight saving  
A 32.768kHz output is available for  
sustaining power-management activi-  
ties. Wake-up capability is provided by  
an alarm interrupt, which is active in  
battery-backup mode.  
adjustment  
- 2.7–3.6V operation (bq4285L);  
➤ Programmable square wave out-  
4.5–5.5V operation (bq4285E)  
put  
- 32kHz output for power  
➤ Three individually maskable in-  
The bq4285E/L write-protects the  
clock, calendar, and storage registers  
during power failure. A backup bat-  
tery then maintains data and oper-  
ates the clock and calendar.  
management  
terrupt event flags:  
➤ Automatic backup and write-  
- Periodic rates from 122µs to  
protect control to external SRAM  
500ms  
➤ Functionally compatible with the  
- Time-of-day alarm once per  
DS1285  
second to once per day  
The bq4285E/L is a fully compatible  
real-time clock for IBM AT-  
compatible computers and other ap-  
plications. The only external compo-  
nents are a 32.768kHz crystal and a  
backup battery.  
- End-of-clock update cycle  
➤ 24-pin plastic DIP or SOIC  
➤ Less than 0.5 µA load under bat-  
tery operation  
The bq4285E/L integrates  
battery-backup controller to make a  
a
➤ 14 bytes for clock/calendar and  
control  
Pin Names  
Pin Connections  
AD0–AD7 Multiplexed address/data  
input/output  
MOT  
Bus type select input  
V
24  
1
V
CC  
OUT  
X
1
23  
22  
2
3
SQW  
CE  
CS  
AS  
DS  
R/W  
INT  
RST  
SQW  
BC  
X1–X2  
NC  
Chip select input  
Address strobe input  
Data strobe input  
Read/write input  
Interrupt request output  
Reset input  
Square wave output  
3V backup cell input  
Crystal inputs  
X
2
OUT  
4
CE  
AD  
0
21  
20  
19  
18  
17  
16  
15  
14  
13  
IN  
5
BC  
AD  
1
AD  
2
AD  
3
AD  
4
AD  
5
AD  
6
6
INT  
RST  
DS  
V
SS  
R/W  
7
8
9
10  
11  
12  
AS  
CS  
AD  
7
No connect  
V
SS  
CEIN  
CEOUT  
VOUT  
VCC  
RAM chip enable input  
RAM chip enable output  
Supply output  
28-Pin PLCC: No Longer Available  
24-Pin DIP or SOIC  
PN428501.eps  
+5V supply  
SLUS006A - MAY 1994 - REVISED MAY 2004  
1
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中文翻译

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与BQ4285LS相关器件

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BQ4285LSN TI

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 		1 TIMER(S), REAL TIME CLOCK, PDSO24, 0.300 INCH, PLASTIC, SOIC-24
BQ4285LSNTR TI

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 		IC 1 TIMER(S), REAL TIME CLOCK, PDSO24, 0.300 INCH, PLASTIC, SOIC-24, Timer or RTC
BQ4285LSTR TI

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 		Enhanced RTC With NVRAM Control
BQ4285P- TI

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 		Real-Time Clock RTC With NVRAM Control
BQ4285P-SB2 TI

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 		Real-Time Clock RTC With NVRAM Control
BQ4285Q TI

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 		1 TIMER(S), REAL TIME CLOCK, PQCC28
BQ4285Q- TI

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 		Real-Time Clock RTC With NVRAM Control
BQ4285S- TI

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 		Real-Time Clock RTC With NVRAM Control
BQ4285S-SB2 TI

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 		Real-Time Clock RTC With NVRAM Control
BQ4285S-SB2TR TI

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 		Real-Time Clock RTC With NVRAM Control

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