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1、74LS138 引脚图和真值表. 7805 引脚图的引脚说明（稳压芯片）4511 引脚图和真值表AT89S51 单片机引脚图七段 LED 数码管1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS6 Dpy Yellow-CCDS5A1 B2 C3OE2A4 OE2B5OE16Y77GND8Y69Y510Y411Y312Y213Y114Y015VCC16U374FCT138APCA7 B1 C2 D6LE5 BI4 LT3 a13 b12 c11 d10 e9 f15 g14VDD16GND8U2CD4511BCNVCCVCCVCCVCCEA/
2、VPP31XTAL119 XTAL218RST9P3.7(RD)17 P3.6(WR)16P3.2(INT0)12P3.3(INT1)13P3.4(T0)14P3.5(T1)15P1.01 P1.12 P1.23 P1.34 P1.45 P1.56 P1.67 P1.78(AD0)P0.039 (AD1)P0.138 (AD2)P0.237 (AD3)P0.336 (AD4)P0.435 (AD5)P0.534 (AD6)P0.633 (AD7)P0.732(A8)P2.021 (A9)P2.122 (A10)P2.223 (A11)P2.324 (A12)P2.425 (A13)P2.526
3、 (A14)P2.627 (A15)P2.728PSEN29ALE/PROG30(TXD)P3.111(RXD)P3.010GND20VCC40U1AT89C51VCCVCC20pFC1Cap20pFC2Cap12Y1 12MHzVinVout GNDVR1 7805560R3 Res2 100uFC5 Cap Pol2 220uFC4 Cap Pol212DS8 LED14.7uFC3 Cap Pol210KR2Res2VCC12JP2Header 2D1Diode12 34JP1MHDR2X2VCC12 34JP3MHDR2X212 34JP4MHDR2X212 34JP5MHDR2X2A
4、 B C D E F GA B C D E F GA B C D E F FP3.2P3.383七 七 七 七1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS6 Dpy Yellow-CCA7 B1 C2 D6LE5 BI4 LT3 a13 b12 c11 d10 e9 f15 g14VDD16GND8U2CD4511BCN4511七 七 七 七 七 七 七 七 七 七 七1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS3 Dpy Yellow-CC 1 2 3 4 5 6 7abcde
5、 fg 8d p9G N Da bfcgde d p10N CDS4 Dpy Yellow-CC 1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS6 Dpy Yellow-CC 1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS5 Dpy Yellow-CC 1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS2 Dpy Yellow-CC 1 2 3 4 5 6 7abcde fg 8d p9G N Da bfcgde d p10N CDS1 Dpy Yellow-CCA1 B2 C3OE2A4 OE2B5OE16Y77GND8Y69Y510Y411Y312Y213Y114Y015VCC16U374FCT138APCA7 B1 C2 D6LE5 BI4 LT3 a13 b12 c11 d10 e9 f15 g14VDD16GND8U2CD4511BCNVCCVCCA B C D E F GA B C D E F GA B C D E F FA B C D E F GA B C D E F GA B C D E F GA B C D E F GP3.3P3.2838388833838
