数据搜索系统,热门电子元器件搜索 |
|
ISL4221EIR 数据表(PDF) 9 Page - Intersil Corporation |
|
ISL4221EIR 数据表(HTML) 9 Page - Intersil Corporation |
9 / 13 page 9 FN6045.2 April 13, 2007 Operation Down to 2.7V ISL422XE transmitter outputs meet RS-562 levels (±3.7V), at the full data rate, with VCC as low as 2.7V. RS-562 levels typically ensure inter operability with RS-232 devices. High Data Rates The ISL422XE maintain the RS-232 ±5V minimum transmitter output voltages even at high data rates. Figure 9 details a transmitter loopback test circuit, and Figure 10 illustrates the loopback test result at 120kBps. For this test, all transmitters were simultaneously driving RS-232 loads in parallel with 1000pF, at 120kBps. Figure 11 shows the loopback results for a single transmitter driving 1000pF and an RS-232 load at 250kBps. The static transmitters were also loaded with an RS-232 receiver. Interconnection with 3V and 5V Logic The ISL422XE directly interface with 5V CMOS and TTL logic families. Nevertheless, with the ISL422XE at 3.3V, and the logic supply at 5V, AC, HC, and CD4000 outputs can drive ISL422XE inputs, but ISL422XE outputs do not reach the minimum VIH for these logic families. See Table 3 for more information. FIGURE 9. TRANSMITTER LOOPBACK TEST CIRCUIT TIME (20 μs/DIV.) T1 T2 2V/DIV. 5V/DIV. VCC = +3.3V FORCEOFF FIGURE 8. TRANSMITTER OUTPUTS WHEN EXITING POWERDOWN C1 - C4 = 0.1 μF ISL422XE VCC FORCEOFF C1 C2 C4 C3 + + + + 1000pF V+ V- 5k TIN ROUT C1+ C1- C2+ C2- RIN TOUT + VCC 0.1 μF VCC FORCEON FIGURE 10. LOOPBACK TEST AT 120kBps FIGURE 11. LOOPBACK TEST AT 250kBps TABLE 3. LOGIC FAMILY COMPATIBILITY WITH VARIOUS SUPPLY VOLTAGES SYSTEM POWER-SUPPLY VOLTAGE (V) VCC SUPPLY VOLTAGE (V) COMPATIBILITY 3.3 3.3 Compatible with all CMOS families. 5 5 Compatible with all TTL and CMOS logic families. 5 3.3 Compatible with ACT and HCT CMOS, and with TTL. ISL422XE outputs are incompatible with AC, HC, and CD4000 CMOS inputs. T1IN T1OUT R1OUT 5 μs/DIV. VCC = +3.3V 5V/DIV. C1 - C4 = 0.1 μF T1IN T1OUT R1OUT 2 μs/DIV. 5V/DIV. VCC = +3.3V C1 - C4 = 0.1 μF ISL4221E, ISL4223E |
类似零件编号 - ISL4221EIR |
|
类似说明 - ISL4221EIR |
|
|
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 |