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参数资料
| 型号： | DS2422X |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Memory IC:Other |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, UUC |
| 文件页数： | 1/23页 |
| 文件大小： | 146K |
| 代理商： | DS2422X |
DS2422/DS2423
1K/4K–Bit 1–WireTM RAM with Counters
DS2422/DS2423
PRELIMINARY
021998 1/23
FEATURES
4096 bits of SRAM (DS2423), 1024 bits with the
DS2422
Four 32–bit read–only counters (DS2423), three
counters with the DS2422
Active–low external trigger inputs for two of the count-
ers with on–chip debouncing compatible with reed
and Wiegand switches
Unique, factory–lasered and tested 64–bit registra-
tion number (8–bit family code + 48–bit serial number
+ 8–bit CRC tester) assures absolute traceability
because no two parts are alike
Memory partitioned into 16 256–bit pages in DS2423,
(4 pages in DS2422), for packetizing data
256–bit scratchpad with strict read/write protocols
ensures integrity of data transfer
On–chip 16–bit CRC generator for safeguarding data
transfers
Built–in multidrop controller ensures compatibility
with other MicroLANTM products
Directlyconnectstoasingleportpinofamicroproces-
sor and communicates at up to 16.3k bits per second
Overdrive mode boosts communication speed to
142k bits per second
8–bit family code specifies device communication
requirements to reader
Presence detector acknowledges when reader first
applies voltage
Compact, low cost 6–pin TSOC surface mount pack-
age
Reads, writes and counts over a wide voltage range
of 2.8V to 5.5V from –40
°C to +85°C
PIN ASSIGNMENT
1
2
3
6
5
4
TSOC PACKAGE
TOP VIEW
3.7 X 4.0 X 1.5 mm
SIDE VIEW
PIN DESCRIPTION
Pin 1
Ground
Pin 2
Data
Pin 3
Vbat
Pin 4
NC
Pin 5
Input channel B
Pin 6
Input channel A
ORDERING INFORMATION
contact factory
DESCRIPTION
The DS2422/DS2423 1–WireTM RAM With Counters
(hereafter referred to as DS242X) is a fully static, read/
write memory for battery operation in a low cost 6–lead
TSOC surface mount package. The memory is orga-
nized as sixteen pages (DS2423) or four pages
(DS2422) of 256 bits each. In addition, the device has
four (DS2423) or three (DS2422) counters, two of them
with external trigger inputs called A and B. Each of the
counters is associated with a memory page. A counter
without external trigger input increments each time data
is written to the page it is associated with (Write Cycle
Counter). The counters triggered by inputs A and B,
respectively, increment with every low–going pulse on
their input. All counters are read–only. They are auto-
matically cleared to zero when the battery is connected.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2423P/T&R | SPECIALTY MEMORY CIRCUIT, PDSO6 |
| DS2423P | SPECIALTY MEMORY CIRCUIT, PDSO6 |
| DS2423X | SPECIALTY MEMORY CIRCUIT, UUC |
| DS2423 | 4K X 1 STANDARD SRAM, PDSO6 |
| DS2422 | 1K X 1 STANDARD SRAM, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2423 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4kbit 1-Wire RAM with Counter |
| DS2423D/T&R | 制造商:Maxim Integrated Products 功能描述:IC SRAM 4KBIT 6FLIPCHIP |
| DS2423D/T&R | 功能描述:IC SRAM 4KBIT 6FCHIP RoHS:否 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:150 系列:- 格式 - 存储器:EEPROMs - 串行 存储器类型:EEPROM 存储容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 线串口 电源电压:2.5 V ~ 5.5 V 工作温度:-40°C ~ 85°C 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-DFN（2x3） 包装:管件 产品目录页面:1445 (CN2011-ZH PDF) |
| DS2423MRAB0 | 制造商:Thomas & Betts 功能描述:300A,NLT,3P4W,MG,423,3P480V |
| DS2423P | 功能描述:静态随机存取存储器 RoHS:否 制造商:Cypress Semiconductor 存储容量:16 Mbit 组织:1 M x 16 访问时间:55 ns 电源电压-最大:3.6 V 电源电压-最小:2.2 V 最大工作电流:22 uA 最大工作温度:+ 85 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TSOP-48 封装:Tray |
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