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BQ3285LD 符合 ACPI 的 RTC IC，具有 242x8 NVSRAM、警报唤醒专用 32kHz 输出和在 L 版本上以 3V 工作

BQ3285LD 描述

The CMOS BQ3285LD is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. The architecture is based on the bq3285 RTC with added features: century bit, low-voltage operation, 32.768kHz output, 126 additional bytes of CMOS, two shadow registers of last address used, and a day-of-month alarm to be compliant with the ACPI RTC specification. A 32.768kHz output is available for sustaining power-management activities. The BQ3285LD 32kHz output is always on whenever VCC is valid. In VCC standby mode, the 32kHz is active, and the BQ3285LD typically draws 100uA. Wake-up capability is provided by an alarm interrupt, which is active in battery-backup mode

	BQ3285	BQ3285E	BQ3285LD	BQ3285LF
Supply Voltage(V)	5	5	3	3
Bus Interface	Multiplexed	Multiplexed	Multiplexed	Multiplexed
Memory Density(Kb)	0.114	0.242	0.242	0.242
Operating Temperature Range(°C)	0 to 70	0 to 70	0 to 70
Pin/Package	24PDIP, 24SOIC	24PDIP, 24SOIC, 24SSOP/QSOP	24SSOP/QSOP	24SSOP/QSOP
Approx. Price (US$)	2.10 | 1ku	2.10 | 1ku	2.10 | 1ku	2.10 | 1ku
RTC Bytes		14	14	14

BQ3285LD 特性

• ACPI-compliant day-of-month alarm
• Y2K century bit
• Direct clock/calendar replacement for IBM ® AT-compatible computers and other applications
• 2 index shadow registers
• 2.7\x965.5V operation
• 240 bytes of general nonvolatile storage
• Dedicated 32.768kHz output pin
• System wake-up capability\x97alarm interrupt output active in battery-backup mode
• Less than 0.55uA load under battery operation
• Selectable Intel or Motorola bus timing
• 24-pin plastic SSOP

BQ3285LD 芯片订购指南

器件	状态	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
BQ3285LDSS	ACTIVE	2.55 | 1ku	SSOP/QSOP (DBQ) | 24	50 | TUBE	3285LDSS -A2
BQ3285LDSSG4	ACTIVE	2.55 | 1ku	SSOP/QSOP (DBQ) | 24	50 | TUBE	3285LDSS -A2
BQ3285LDSSTR	ACTIVE	2.10 | 1ku	SSOP/QSOP (DBQ) | 24	2500 | LARGE T&R	3285LDSS -A2
BQ3285LDSSTRG4	ACTIVE	2.10 | 1ku	SSOP/QSOP (DBQ) | 24	2500 | LARGE T&R	3285LDSS -A2

BQ3285LD 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
BQ3285LDSS	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	BQ3285LDSS	BQ3285LDSS
BQ3285LDSSG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	BQ3285LDSSG4	BQ3285LDSSG4
BQ3285LDSSTR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	BQ3285LDSSTR	BQ3285LDSSTR
BQ3285LDSSTRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	BQ3285LDSSTRG4	BQ3285LDSSTRG4

BQ3285LD 应用技术支持与电子电路设计开发资源下载

1. BQ3285LD 数据资料 dataSheet 下载.PDF
2. TI 德州仪器实时时钟产品选型与价格 . xls
3. PowerPAD™ Thermally Enhanced Package   (PDF  1040 KB)
4. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)   (PDF  2206 KB)
5. Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
6. PowerPAD™ Made Easy (PDF 57 KB)
7. 标准线性产品交叉参考 (Rev. D)   (PDF  1058 KB)
8. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
9. 所选封装材料的热学和电学性质 (PDF 645 KB)
10. 高速数据转换 (PDF 1967 KB)

BQ3285LD 相关工具

名称	型号	公司	工具/软件类型
BQ3285LD 评估模块	BQ3285LDEVM	Texas Instruments	开发电路板/EVM