전자부품 데이터시트 검색엔진 |
|
CDCM1802RGTR 데이터시트(PDF) 4 Page - Texas Instruments |
|
|
CDCM1802RGTR 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 22 page CDCM1802 CLOCK BUFFER WITH PROGRAMMABLE DIVIDER, LVPECL I/O + ADDITIONAL LVCMOS OUTPUT SCAS759 − APRIL 2004 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 control pin settings The CDCM1802 has three control pins, S0, S1, and the enable pin (EN) to select different output mode settings. All three inputs (S0, S1, EN) are 3-level inputs. In addition, the EN input allows disabling all outputs and place them into a high-z (or tristate) output state when pulled to GND. RS0 = Open EN CDCM1802 S1 S0 RS1 = 0 REN = 60 kΩ Setting for Mode 4: EN = VDD/2 S1 = 0 S0 = 1 Figure 1. Control Pin Setting for Example Each control input incorporates a 60-kΩ pullup resistor. Thus, it is easy to choose the input setting by designing a resistor pad between the control input and GND. To choose a logic zero, the resistor value must be zero. Setting the input high requires leaving the resistor pad empty (no resistor installed). For setting the input to VDD/2, the installed resistor needs a value of 60 kΩ with a tolerance better or equal to 10%. Table 1. Selection Mode Table LVPECL LVCMOS MODE EN S1 S0 Y0 Y1 0 0 X X Off (high-z) Off (high-z) 1 VDD/2 0 VDD/2 ÷ 1 ÷ 1 2 VDD/2 VDD/2 1 ÷ 1 ÷ 2 3 1 0 0 ÷ 1 ÷ 4 4 VDD/2 0 1 ÷ 2 ÷ 2 5 1 0 1 ÷ 2 ÷ 4 6 VDD/2 0 0 ÷ 4 ÷ 4 7 VDD/2 1 0 ÷ 4 ÷ 8 8 VDD/2 VDD/2 VDD/2 ÷ 8 ÷ 1 9 1 1 0 ÷ 8 ÷ 4 10 1 1 1 Off (high-z) ÷ 4 NOTE: The LVPECL outputs are open emitter stages. Thus, if you leave the unused LVPECL output Y0 unconnected, then the current consumption is minimized and noise impact to remaining outputs is neglectable. Also, each output can be individually disabled by connecting the corresponding VDD input to GND. |
유사한 부품 번호 - CDCM1802RGTR |
|
유사한 설명 - CDCM1802RGTR |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |