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Datasheet > 微控制器和处理器 > 计时器或实时时钟> BQ3285LFSS-A1
BQ3285LFSS-A1 PDF预览

BQ3285LFSS-A1

更新时间： 2024-11-28 21:53:35
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
22页 148K
描述
Y2K-Enhanced Real-Time Clock (RTC)

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中文翻译

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BQ3285LFSS-A1 技术参数

是否Rohs认证：符合生命周期：Obsolete
零件包装代码：SSOP包装说明：0.150 INCH, GREEN, PLASTIC, SSOP-24
针数：24Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：1 week风险等级：5.8
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
JESD-609代码：e4长度：8.65 mm
湿度敏感等级：2端子数量：24
计时器数量：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）：260电源：3/5 V
认证状态：Not Qualified座面最大高度：1.73 mm
子类别：Timer or RTC最大供电电压：5.5 V
最小供电电压：2.7 V标称供电电压：3 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
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：NO
宽度：3.9 mmuPs/uCs/外围集成电路类型：TIMER, REAL TIME CLOCK
Base Number Matches：1

BQ3285LFSS-A1 数据手册

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bq3285LF  
Y2K-Enhanced  
(
)
Real-Time Clock RTC  
General Description  
The bq3285LF write-protects the  
clock, calendar, and storage registers  
during power failure. A backup  
battery then maintains data and oper-  
ates the clock and calendar.  
Features  
The CMOS bq3285LF is a low-power  
microprocessor peripheral providing  
a time-of-day clock and 100-year cal-  
endar with alarm features and bat-  
tery operation. The architecture is  
based on the bq3285 RTC with added  
features: century bit, low-voltage op-  
eration, 32.768kHz output, 126 addi-  
tional bytes of CMOS, two shadow  
registers of last address used, and a  
day-of-month alarm to be compliant  
with the ACPI RTC specification.  
➤ ACPI-compliant day-of-month  
alarm  
➤ Y2K century bit  
The bq3285LF 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.  
➤ Direct clock/calendar replace-  
ment for IBM® AT-compatible  
computers and other applications  
➤ 2 index shadow registers  
➤ 2.7–5.5V operation  
The bq3285LF is intended for use in  
3V systems; however, it may also op-  
erate at 5V and then go into a 3V  
power-down state, write-protecting  
as if in a 3V system.  
➤ 240 bytes of general nonvolatile  
storage  
A 32.768kHz output is available for  
sustaining power-management ac-  
tivities. The bq3285LF 32kHz out-  
put is always on whenever VCC is  
valid. In VCC standby mode, the  
32kHz is active, and the bq3285LF  
typically draws 100µA. Wake-up ca-  
pability is provided by an alarm in-  
terrupt, which is active in battery-  
backup mode. In battery-backup  
mode, current drain is less than  
550nA.  
➤ Dedicated 32.768kHz output pin  
➤ System wake-up capability—  
alarm interrupt output active in  
battery-backup mode  
➤ Less than 0.55µA load under bat-  
tery operation  
➤ Selectable Intel or Motorola bus  
timing  
➤ 24-pin plastic SSOP  
Pin Connections  
Pin Names  
AD0–AD7 Multiplexed address/  
data input/output  
32K  
32.768kHz output  
EXTRAM Extended RAM enable  
MOT  
CS  
Bus type select input  
Chip select input  
Address strobe input  
Data strobe input  
Read/write input  
Interrupt request output  
Reset input  
MOT  
24  
1
V
CC  
32k  
EXTRAM  
RCL  
BC  
RAM clear input  
3V backup cell input  
Crystal inputs  
X1  
X2  
23  
22  
2
3
4
RCL  
BC  
AD  
AD  
AD  
AD  
AD  
AD  
AD  
21  
20  
19  
18  
17  
16  
15  
14  
13  
0
1
2
3
4
5
6
AS  
5
X1–X2  
VCC  
6
INT  
RST  
DS  
DS  
7
Supply voltage input  
Ground  
8
9
R/W  
INT  
RST  
V
SS  
VSS  
10  
11  
12  
R/W  
AS  
CS  
AD  
7
V
SS  
24-Pin SSOP  
PN3285ED/LD.eps  
6/99 B  
1
1234567...22

中文翻译

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BQ3285LFSS-A1 替代型号

型号 品牌 替代类型 描述 数据表
BQ3285LFSS-A1TR TI

完全替代

 Y2K-Enhanced Real-Time Clock (RTC)
BQ3285LDSSTR TI

完全替代

 Real-Time Clock (RTC)
BQ3285LDSS TI

类似代替

 Real-Time Clock (RTC)

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