D1 TM A (142) RI A (125) LL A (141) CTS B CTS A (106) DSR B DSR A (109) DCD B DCD A (107) DTR B DTR A (108) RTS B RTS A (105) SHIELD (101) SG (102) RXD B RXD A (104) RXC B RXC A (115) TXC B TXC A (114) SCTE B SCTE A (113) TXD B TXD A (103) *OPTIONAL RL A (140) 1545 TA01 DB-25 *** D2 D3 2 12 15 11 24 14 17 9 16 3 7 1 23 20 19 4 22 6 10 8 18 13 5 * R1 R2 D1 R3 D2 D3 R2 R1 R3 R4 D4 R5 D5 25 21 LTC1543 TXD LTC1545 SCTE TXC RXC RTS RXD DTR DSR DCD CTS RI LL TM RL LTC1344A DTE SERIAL CONTROLLER LTC1543 DCE LTC1344A LTC1344A LTC1543 SERIAL CONTROLLER TXD D1 TXD 103Ω R3 TXD SCTE D2 SCTE 103Ω R2 SCTE R1 D3 TXC R1 103Ω TXC D3 TXC RXC R2 103Ω RXC D2 RXC RXD R3 103Ω RXD D1 RXD LTC1545 LTC1545 RTS D1 RTS R3 RTS DTR D2 DTR R2 DTR D3 R1 DCD R1 DCD D3 DCD DSR R2 DSR D2 DSR CTS R3 CTS D1 CTS LL TM RI RL LL D4 R4 TM R4 R5 D5 RI RL D4 D5 R5 LL TM RI RL 1545 F09 LATCH DCE/ DTE M2 22 LTC1344A 23 M1 M0 (DATA) 24 1 CONNECTOR (DATA) M0 LTC1543 M1 M2 DCE/DTE DCE/DTE M2 M1 LTC1545 M0 D4ENB R4EN 11 12 13 NC 14 NC 14 CABLE VCC 13 12 11 15 10k 16 (DATA) 1545 F10 IZ 3.25mA A' A R1 51.5Ω S1 –10V S2 –3V VZ 3V R2 51.5Ω 10V LTC1344A R8 6k LTC1543 LTC1545 R5 20k R6 10k RECEIVER S3 R3 124Ω R4 20k B R7 10k B' C' 1545 F12 –3.25mA A' A LTC1545 R8 6k R5 20k R6 10k S3 B' C' R4 20k B GND RECEIVER R7 10k 1545 F13 GND 1545 F15 A' A R1 51.5Ω S1 S2 R2 51.5Ω LTC1344A R8 6k R6 10k S3 R3 124Ω R4 20k B LTC1543 LTC1545 R5 20k RECEIVER R7 10k B' C' GND 1545 F17 C6 C7 C8 100pF 100pF 100pF 3 8 11 12 13 LTC1344A VCC 5V 14 4 25 C5 1µF LTC1543 5 TXD D1 6 SCTE D2 7 11 12 13 14 VCC 5V RTS DTR R2 10 RXD C10 1µF R1 9 RXC C9 1µF R3 CTS LL RI TM RL M0 M1 M2 22 24 21 11 20 15 19 12 18 17 17 9 16 3 15 16 1 VEE GND D1 D2 TXD A (103) TXD B SCTE A (113) SCTE B TXC A (114) TXC B RXC A (115) RXC B RXD A (104) RXD B SG SHIELD DB-25 MALE CONNECTOR 36 C11 1µF 35 34 4 33 19 32 20 31 23 RTS A (105) RTS B DTR A (108) DTR B D3 6 R1 7 R2 8 R3 9 D4 10 R4 17 R5 18 14 2 14 DCE/DTE 4 13 16 15 18 17 19 20 22 23 24 1 23 M2 3 12 9 10 M1 1,19 VCC 2,20 VDD 11 5 4 6 7 7 LTC1545 DSR VEE 24 M0 5 DCD C12 1µF D3 8 TXC 2 C4 3.3µF M0 CHARGE PUMP 2 21 C2 1µF 26 M1 27 LATCH M2 1 VCC DCE/DTE C1 1µF 28 C13 1µF + C3 1µF 3 D5 M0 D4ENB M1 M2 DCE/DTE R4EN 30 8 29 10 28 6 27 22 26 5 25 13 24 18 23 * 22 25 21 21 DCD A (109) DCD B DSR A (107) DSR B CTS A (106) CTS B LL (141) RI (125) TM (142) RL (140) 15 16 NC *OPTIONAL 1544 F22 C6 C7 C8 100pF 100pF 100pF 3 8 11 12 13 LTC1344A VCC 5V 25 C5 1µF LTC1543 5 RXD D2 7 R2 10 TXD 11 12 13 NC VCC 5V C10 1µF R1 9 SCTE C9 1µF 14 R3 VEE GND D1 D2 R2 R3 9 12 13 NC 14 9 20 15 19 12 18 24 17 11 16 2 15 14 RXD A (104) RXD B RXC A (115) RXC B TXC A (114) TXC B SCTE A (113) SCTE B TXD A (103) TXD B SGND (102) SHIELD (101) DB-25 FEMALE CONNECTOR 36 C11 1µF 35 34 5 33 13 32 6 31 22 CTS A (106) CTS B DSR A (107) DSR B R5 D5 M0 D4ENB M1 M2 DCE/DTE 30 8 29 10 28 20 27 23 26 4 RTS A (105) 19 RTS B * RI (125) 24 R4 18 11 21 25 D4 17 TM M0 M1 M2 R1 10 RL 17 D3 8 LL 22 1 1,19 VCC 2,20 VDD 7 RI 3 16 7 LTC1545 RTS VCC 23 DCE/DTE 6 DTR 16 15 18 17 19 20 22 23 24 1 M2 5 DCD 9 10 M1 4 DSR 5 4 6 7 M0 3 CTS VEE D3 8 TXC C12 1µF 24 D1 6 RXC 2 C4 3.3µF 21 M0 4 M1 2 C2 1µF 27 26 CHARGE PUMP LATCH VCC M2 1 C1 1µF + C3 1µF C13 1µF 28 DCE/DTE 14 3 R4EN 23 18 22 21 21 25 DCD A (109) DCD B DTR A (108) DTR B LL (141) RL (140) TM (142) 15 16 NC *OPTIONAL 1544 F23 C6 C7 C8 100pF 100pF 100pF 3 8 11 12 13 LTC1344A VCC 5V 14 25 C5 1µF LTC1543 5 DTE_TXD/DCE_RXD D1 6 DTE_SCTE/DCE_RXC D2 7 R1 9 DTE_RXC/DCE_SCTE R2 10 DTE_RXD/DCE_TXD 11 12 C12 1µF 5 4 6 7 DTE_RTS/DCE_CTS DTE_DTR/DCE_DSR VCC 5V C9 1µF R3 2 14 22 24 21 11 20 15 19 12 18 17 17 9 16 3 15 16 7 M1 1,19 VCC 2,20 VDD 3 1 VEE GND D1 4 D2 DTE_CTS/DCE_RTS DTE_LL/DCE_RI DTE_RI/DCE_LL DTE_TM/DCE_RL DTE_RL/DCE_TM 6 R2 8 R3 9 D4 10 R4 17 R5 18 12 13 14 DCE/DTE M0 M1 M2 R1 7 11 DTE TXD A DCE RXD A TXD B RXD B SCTE A RXC A SCTE B RXC B TXC A TXC A TXC B TXC B RXC A SCTE A RXC B SCTE B RXD A TXD A RXD B TXD B SG SHIELD DB-25 CONNECTOR 36 C11 1µF 35 34 4 33 19 32 20 31 23 RTS A CTS A RTS B CTS B DTR A DSR A DTR B DSR B DCD A DCD A D3 LTC1545 DTE_DSR/DCE_DTR 16 15 18 17 19 20 22 23 24 1 23 M0 5 DTE_DCD/DCE_DCD 9 10 24 13 M2 14 DCE/DTE C10 1µF VEE D3 8 DTE_TXC/DCE_TXC 2 C4 3.3µF M0 4 M1 2 21 C2 1µF 27 26 CHARGE PUMP LATCH VCC M2 1 C1 1µF + C3 1µF C13 1µF 28 DCE/DTE 3 D5 M0 D4ENB M1 M2 DCE/DTE R4EN 30 8 29 10 28 6 27 22 26 5 25 13 24 18 23 * 22 25 21 21 DCD B DCD B DSR A DTR A DSR B DTR B CTS A RTS A CTS B RTS B LL RI RI LL TM RL RL TM 15 16 NC *OPTIONAL 1544 F24