欢迎访问ic37.com |
会员登录 免费注册
发布采购

CTA88-000-SS 参数 Datasheet PDF下载

CTA88-000-SS图片预览
型号: CTA88-000-SS
PDF下载: 下载PDF文件 查看货源
内容描述: 8位地址 - 8位数据编码器/解码器 [8 bit Address - 8 bit Data encoder/decoder]
分类和应用: 解码器消费电路商用集成电路编码器
文件页数/大小: 6 页 / 327 K
品牌: RADIOMETRIX [ RADIOMETRIX LTD ]
 浏览型号CTA88-000-SS的Datasheet PDF文件第1页浏览型号CTA88-000-SS的Datasheet PDF文件第3页浏览型号CTA88-000-SS的Datasheet PDF文件第4页浏览型号CTA88-000-SS的Datasheet PDF文件第5页浏览型号CTA88-000-SS的Datasheet PDF文件第6页  
Encoder Mode  
CTA88 can be put into Encoder Mode by connecting TX/RX MODE (pin 4) to supply (Vcc)  
+5V  
supply  
A7  
A6  
A5  
A4  
A3  
A2  
A1  
A0  
Vdd  
RST  
TXD  
TXE  
RF  
TXD  
EN  
TX MODE  
C0  
Vcc  
C1  
C2  
GND  
Vss  
OSC1  
OSC2  
D0  
10k array  
100nF  
Vss  
D7  
D6  
D5  
D4  
3.58MHz  
D1  
D2  
D3  
10k array  
10k array  
Figure 2: CTA88 in Encoder Mode  
Input/Output Description  
Pin  
Name  
1
2
3
4
5
6
RST  
TXD  
TXE  
TX/RX MODE  
C0  
Input  
Active Low Reset (Connect to user system reset or tie to Vdd)  
Encoded Address and Data to TXD input of RF Transmitter  
high (Vdd) = enable radio transmitter module; low (0V) = TX OFF.  
tie to Vcc = TX mode  
Output  
Output  
Input  
Input  
Input  
Operating mode inputs5  
C1  
7
C2  
Input  
8
9
Vss  
Supply  
Output  
Input  
Input  
Supply  
Supply  
Supply Ground  
OSC1  
OSC2  
D0 - D7  
Vss  
Connect to 3.58MHz resonator1  
Connect to 3.58MHz resonator1  
8 bits of Data input (no internal pull-ups)4  
Supply Ground  
10  
11 - 18  
19  
20  
Vdd  
4.0V-5.5V supply (decouple with 100nF close to IC).  
2.0V-5.5V (low voltage version)  
8 bits of Address (Internal pull-ups to Vdd)4  
21 - 28  
A0 – A7  
Input  
Notes:  
1. OSC1, 2 require a 3.58MHz ceramic resonator like KBR-3.58MKS (internal caps, ground middle  
pin).  
If a 2 pin resonator or crystal is used, then two 15pF caps are needed : one from OSC1 to 0V ;  
one from OSC2 to 0V  
2. 'TXE' is active high. For units with TXE inputs, an inverting buffer will be needed  
3. Data and Address pins are logic true (1=VCC, 0=0V) inputs and outputs  
4. Data inputs have no pullups. Address inputs have weak pullups to Vcc and are schmitt trigger  
inputs  
5. C0-C2 (pins 5-7) are active high and have no pullups.  
6. A 1kbps bi-phase communications protocol is used, compatible with all Radiometrix Wireless  
modules  
7. A databurst is approximately 110mS long  
8. After asserting TX on high (active), the coder allows 50mS for TX to power up and settle  
9. Pin 4 (TX/RX MODE) has no pullup.  
10. Without external loads the chip draws less than 2mA from 5v  
Radiometrix Ltd  
CTA88  
page 2