BQ2022A 具有 SDQ 接口的 1Kb 串行 EPROM
- ZHCSPA6F September 2006 – January 2022 BQ2022A
  
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BQ2022A 具有 SDQ 接口的 1Kb 串行 EPROM

本资源的原文使用英文撰写。为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

用于存储用户可编程配置数据的 1024 位一次性可编程 (OTP) EPROM
出厂设定的唯一 64 位识别号
单线接口，可减少电路板布线
同步通信，可减少主机中断开销
数据引脚上的 15KV IEC 61000-4-2 ESD 兼容性
无需待机功耗
采用 3 引脚 SOT-23 封装和 TO-92 封装

2 应用

安全编码
库存跟踪
产品修正维护
电池组识别

3 说明

BQ2022A 是一款 1Kb 串行 EPROM，其中包含出厂设定的唯一 48 位识别号、8 位 CRC 生成以及 8 位系列代码 (09h)。一个 64 位状态寄存器控制写保护和页面重定向。

BQ2022A SDQ™ 接口仅需要单点连接和一个接地回路。DATA 引脚也是 BQ2022A 的唯一电源。

小型表明贴装封装选项节省了印刷电路板的空间，同时其低成本也使得它适合于诸如电池组配置参数，记录维护，资产跟踪，产品修正状态，和存取代码安全的应用。

器件信息

器件型号	封装⁽¹⁾	封装尺寸（标称值）
BQ2022A	SOT-23 (3)	2.92mm × 1.30mm
BQ2022A	TO-92 (3)	4.30mm × 4.30mm

(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。

简化版原理图

4 Revision History

Changes from Revision E (March 2016) to Revision F (January 2022)

Updated #GUID-15B7BBCD-0E8E-4D5C-95CD-5E8206A8B17B/TITLE-SLUS724SLUS7249846 Go

Changes from Revision D (December 2014) to Revision E (February 2016)

Added text: "No additional capacitance..." to Section 8.2 Go
Added Section 8.2.2.2 Go
Added text and Figure 9-1 to Section 9 Go

5 Pin Configuration and Functions

Figure 5-1 DBZ Package3-Pin SOT-23(Top View)

Figure 5-2 LP Package3-Pin TO-92(Bottom View)

Table 5-1 Pin Functions

PIN			TYPE	DESCRIPTION
NAME	SOT-23	TO-92	TYPE	DESCRIPTION
SDQ	1	2	I	Data
VSS	2, 3	1	—	Ground. Both pins should be connected to system ground.
NC	—	3	—	No connection. This pin should be connected to system ground or left floating.

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) ⁽¹⁾

	MIN	MAX	UNIT
DC voltage applied to data, V_PU	–0.3	7	V
Low-level output current, I_OL		40	mA
ESD IEC 61000-4-2 air discharge, data to V_SS, V_SS to data		15	kV
Operating free-air temperature, T_A	–20	70	°C
Communication free-air temperature, T_A(Comm)⁽²⁾	–40	85	°C
Junction temperature, T_J		125	°C
Storage temperature, T_stg	–55	125	°C

(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions. If outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime.

(2) Communication is specified by design.

6.2 ESD Ratings

			VALUE	UNIT
V_(ESD)	Electrostatic discharge	Human body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	±2000	V
V_(ESD)	Electrostatic discharge	Charged device model (CDM), per JEDEC specification JESD22-C101⁽²⁾	±500	V

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

		MIN	NOM	MAX	UNIT
V_PU	Operational pullup voltage	2.65		5.5	V
R_PU	Serial communication interface pullup resistance		5		kΩ

6.4 Thermal Information

THERMAL METRIC⁽¹⁾		BQ2022A		UNIT
THERMAL METRIC⁽¹⁾		DBZ (3 PINS)	LP (3 PINS)	UNIT
R_θJA	Junction-to-ambient thermal resistance	244.3	158.5	°C/W
R_θJC(top)	Junction-to-case (top) thermal resistance	104.9	55.6
R_θJB	Junction-to-board thermal resistance	93.1	n/a
ψ_JT	Junction-to-top characterization parameter	4.8	26.8
ψ_JB	Junction-to-board characterization parameter	66.4	137.8
R_θJC(bot)	Junction-to-case (bottom) thermal resistance	n/a	n/a

(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics Application Report (SPRA953).

6.5 Electrical Characteristics: DC

T_A = –20°C to 70°C; V_PU(min) = 2.65 V_DC to 5.5 V_DC, all voltages relative to VSS

PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
I_DATA	Supply current	V_PU = 5.5 V			20	μA
V_OL	Low-level output voltage	Logic 0, V_PU = 5.5 V, I_OL = 4 mA, SDQ pin			0.4	V
V_OL	Low-level output voltage	Logic 0, V_PU = 2.65 V, I_OL = 2 mA			0.4	V
V_OH	High-level output voltage	Logic 1		V_PU	5.5
I_OL	Low-level output current (sink)	V_OL = 0.4 V, SDQ pin			4	mA
V_IL	Low-level input voltage	Logic 0			0.8	V
V_IH	High-level input voltage	Logic 1	2.2			V
V_PP	Programming voltage		11.5		12	V

6.6 Switching Characteristics: AC

T_A = –20°C to 70°C; V_PU(min) = 2.65 V_DC to 5.5 V_DC, all voltages relative to VSS

PARAMETER		TEST CONDITIONS	MIN	MAX	UNIT
t_c	Bit cycle time ^⁽¹⁾		60	120	μs
t_WSTRB	Write start cycle ^⁽¹⁾		1	15	μs
t_WDSU	Write data setup ^⁽¹⁾		t_WSTRB	15	μs
t_WDH	Write data hold ^{⁽¹⁾ ⁽²⁾}		60	t_c	μs
t_rec	Recovery time ^⁽¹⁾		1		μs
t_rec	Recovery time ^⁽¹⁾	For memory command only	5		μs
t_RSTRB	Read start cycle ^⁽¹⁾		1	13	μs
t_ODD	Output data delay ^⁽¹⁾		t_RSTRB	13	μs
t_ODHO	Output data hold ^⁽¹⁾		17	60	μs
t_RST	Reset time ^⁽¹⁾		480		μs
t_PPD	Presence pulse delay ^⁽¹⁾		15	60	μs
t_PP	Presence pulse ^⁽¹⁾		60	240	μs
t_EPROG	EPROM programming time		2500		μs
t_PSU	Program setup time		5		μs
t_PREC	Program recovery time		5		μs
t_PRE	Program rising-edge time			5	μs
t_PFE	Program falling-edge time			5	μs
t_RSTREC			480		μs

(1) 5-kΩ series resistor between SDQ pin and V_PU. (See Figure 8-1.)

(2) t_WDH must be less than t_c to account for recovery.

6.7 Typical Characteristics

Figure 6-1 Supply Current vs Temperature

Figure 6-3 Low-Level Input Voltage vs Temperature

Figure 6-2 Low-Level Output Voltage vs Temperature

Figure 6-4 High-Level Input Voltage vs Temperature

7 Detailed Description

7.1 Overview

Section 7.2 shows the relationships among the major control and memory sections of the BQ2022A. The BQ2022A has three main data components: a 64-bit factory-programmed ROM, including 8-bit family code, 48-bit identification number and 8-bit CRC value, 1024-bit EPROM, and EPROM STATUS bytes. Power for read and write operations is derived from the DATA pin. An internal capacitor stores energy while the signal line is high and releases energy during the low times of the DATA pin, until the pin returns high to replenish the charge on the capacitor. A special manufacturer's PROGRAM PROFILE BYTE can be read to determine the programming profile required to program the part.