 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
TC7117A 数据表(PDF) 10 Page - Microchip Technology |
|
||||||||||||||||||||||||||||||
TC7117A 数据表(HTML) 10 Page - Microchip Technology |
|
|
10 / 24 page  TC7116/A/TC7117/A DS21457C-page 10 © 2006 Microchip Technology Inc. FIGURE 3-4: Exclusive “OR” Gate for Decimal Point Drive 3.2 Digital Section Figure 3-5 and Figure show the digital section for TC7116/TC7116A and TC7117/TC7117A, respectively. For the TC7116/TC7116A (Figure 3-5), an internal dig- ital ground is generated from a 6V Zener diode and a large P-channel source follower. This supply is made stiff to absorb the relative large capacitive currents when the backplane (BP) voltage is switched. The BP frequency is the clock frequency 4800. For 3 readings per second, this is a 60Hz square wave with a nominal amplitude of 5V. The segments are driven at the same frequency and amplitude, and are in phase with BP when OFF, but out of phase when ON. In all cases, negligible DC voltage exists across the segments. Figure is the digital section of the TC7117/TC7117A. It is identical to the TC7116/TC7116A, except that the regulated supply and BP drive have been eliminated, and the segment drive is typically 8mA. The 1000’s out- put (Pin 19) sinks current from two LED segments, and has a 16mA drive capability. The TC7117/TC7117A are designed to drive common anode LED displays. In both devices, the polarity indication is ON for analog inputs. If VIN- and VIN+ are reversed, this indication can be reversed also, if desired. FIGURE 3-5: TC7116/TC7116A Digital Section TC7116 TC7116A Decimal Point Select V+ V+ TEST GND 4030 To LCD Decimal Point BP TC7116 TC7116A LCD Phase Driver Thousands Hundreds Tens Units 4 Backplane 21 39 37 OSC2 Internal Digital Ground V+ V- TEST 6.2V 500 Ω 26 35 To Switch Drivers From Comparator Output Clock VTH = 1V 7-Segment Decode 7-Segment Decode 7-Segment Decode 200 40 38 Typical Segment Output Internal Digital Ground Segment Output V+ 0.5mA 2mA Latch OSC3 OSC1 ÷ ÷ HLDR ~70k Ω Logic Control 1 |
类似零件编号 - TC7117A |
|
类似说明 - TC7117A |
|
|
|
链接网址 |
| 隐私政策 |
| ALLDATASHEETCN.COM |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
