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BQ3285LSS PDF预览

BQ3285LSS

更新时间: 2024-10-13 21:54:35
品牌 Logo 应用领域
德州仪器 - TI 计时器或实时时钟微控制器和处理器外围集成电路光电二极管
页数 文件大小 规格书
29页 1049K
描述
Real-Time Clock RTC

BQ3285LSS 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:SSOP
包装说明:SSOP, SSOP24,.24针数:24
Reach Compliance Code:not_compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.86
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:8.65 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:SSOP封装等效代码:SSOP24,.24
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, SHRINK PITCH
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:1.75 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:0.635 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:3.9 mm
uPs/uCs/外围集成电路类型:TIMER, REAL TIME CLOCKBase Number Matches:1

BQ3285LSS 数据手册

 浏览型号BQ3285LSS的Datasheet PDF文件第2页浏览型号BQ3285LSS的Datasheet PDF文件第3页浏览型号BQ3285LSS的Datasheet PDF文件第4页浏览型号BQ3285LSS的Datasheet PDF文件第5页浏览型号BQ3285LSS的Datasheet PDF文件第6页浏览型号BQ3285LSS的Datasheet PDF文件第7页 
bq3285E/L  
Real-Time Clock (RTC)  
BCD or binary format for clock  
Features  
General Description  
and calendar data  
Direct clock/calendar replace-  
ment for IBM® AT-compatible  
computers and other applications  
Th e CMOS bq3285E /L is a low-  
power m icr opr ocessor per iph er a l  
providing a time-of-day clock and  
100-year calendar with alarm fea-  
t ures a nd ba t t ery opera t ion . Th e  
b q3 28 5 L s u p p or t s 3 V s ys t e m s.  
Other bq3285E/L features include  
three maskable interrupt sources,  
square-wave output, and 242 bytes  
of general nonvolatile storage.  
Calendar in day of the week, day  
of the month, months, and years,  
with automatic leap-year adjust-  
ment  
Functionally compatible with the  
DS1285  
Time of day in seconds, minutes,  
and hours  
- Closely matches MC146818A  
pin configuration  
- 12- or 24-hour format  
- Optional daylight saving  
2.7–3.6V operation (bq3285L);  
adjustment  
4.5–5.5V operation (bq3285E)  
A 32.768kHz output is available for  
sustaining power-management ac-  
tivities. Wake-up capability is pro-  
vided by an alarm interrupt, which  
is active in battery-backup mode.  
Programmable square wave out-  
242 bytes of general nonvolatile  
put  
storage  
Three individually maskable in-  
32.768kHz output for power man-  
terrupt event flags:  
agement  
- Periodic rates from 122µs to  
The bq3285E/L write-protects the  
clock, calendar, and storage registers  
du r in g power fa ilu r e. A ba cku p  
battery then maintains data and oper-  
ates the clock and calendar.  
System wake-up capability—  
alarm interrupt output active in  
battery-backup mode  
500ms  
- Time-of-day alarm once per  
second to once per day  
Less than 0.5µA load under bat-  
- End-of-clock update cycle  
24-pin plastic DIP, SOIC, or  
tery operation  
The bq3285E/L is a fully compatible  
real-time clock for IBM AT-compatible  
computers and other applications.  
The only external components are a  
32.768kHz crystal and a backup bat-  
tery.  
Selectable Intel or Motorola bus  
SSOP  
timing  
14 bytes for clock/calendar and  
control  
Pin Connections  
Pin Names  
AD0–AD7 Multiplexed address/  
data input/output  
RST  
Reset input  
SQW  
Square wave output  
MOT  
24  
1
V
CC  
SQW  
EXTRAM  
MOT  
CS  
Bus type select input  
Chip select input  
Address strobe input  
Data strobe input  
Read/write input  
Interrupt request  
output  
EXTRAM Extended RAM enable  
X1  
X2  
23  
22  
2
3
RCL  
BC  
RAM clear input  
3V backup cell input  
Crystal inputs  
Power supply  
Ground  
4
RCL  
BC  
AD  
0
AD  
1
AD  
2
AD  
3
AD  
4
AD  
5
AD  
6
21  
20  
19  
18  
AS  
5
6
INT  
RST  
DS  
X1–X2  
VCC  
7
R/W  
INT  
8
9
17 DS  
16  
15  
V
SS  
R/W  
VSS  
10  
11  
12  
AD  
7
14 AS  
13 CS  
V
SS  
24-Pin DIP or SOIC/SSOP  
PN3285E1.eps  
SLUS004A -DECEMBER 1993 - REVISED MAY 2004  
1

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