SM74HC245 ??? - 1 - sm 74hc 245 SM74HC245 ? cmos ???? ttl lsttl ? SM74HC245 ?? ??? ? oe dir dir ?? dir ???? ? a >b dir ???? ? b >a oe ???? oe ?? ?? ?? oe ??? ? SM74HC245 ???? ??? ?? ? ?? ?? mm ? mm SM74HC245d sop20 12.75*7.5*2.35 1.27 sm245 sop20 - 2 12.45*5.3*1.9 1.27 sm245ts tssop20 6.5*4.4*1.0 0.65 SM74HC245p dip20 24.6*6.4*3.4 2.54 ?? ? ? cmos ? ?? ? ?? ? esd h b m > 4 kv ? ? ? sop20 sop20 - 2 tssop20 dip20 ? ? led ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 2 - ??? ? ? ?? oe dir l l bn an l h an bn h x ? ?? ? ?? ? a0 a7 / 2 9 b0 b7 / 18 11 oe ? 19 dir 1 dir=1,a >b dir=0,b >a gnd ? 20 ? vdd ?? 10 ? SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 3 - ? ? ta = 25 ??? vdd - 0.5 +7.0 v ?? vi1 - 0.5 vdd + 0.5 v pd < 400 mw ? topt - 40 +80 ? tstg - 50 +150 ??? vdd 3. 0 5 .0 5.5 v - ??? v ih 3. 3 v vdd=5.0v ??? v il 1.5 v vdd=5.0v ? ??? v oh 4.9 v vdd =5 .0 v ??? v ol 0.1 v vdd =5 .0 v ? i dd 1 ua vdd = 6 .0 v ? i oh - 54 - 64 ma vdd=5 .0 v i ol 73 83 ma vdd=5 .0 v ? f max 80 mhz vdd=5 .0 v f=250khz c l =30p ???? ?? a< >b ? t plh 12 ns a< >b ?? t phl 12 ns t r 8 ns ? t f 6 n s SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 4 - ?? ? ? rt ???? ? r t c l ?? vin vo SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 5 - ?? sop20: SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 6 - sop20 - 2: SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 7 - tssop20: SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
- 8 - dip20: SM74HC245 ??? ??e??????e?t1??? goston electronics co.,ltd v1.5 ? 400-033-6518 www.linkage66.com sale@sz-ledpower.cn free datasheet http://www.ndatasheet.com
|
