SP522

® SP522/SP524 Low-Cost Programmable Multi-Protocol Transceivers ■ SP522 — 2 Drivers and 2 Receivers ■ SP524 — 4 Drivers and 4 Receivers ■ Driver and Receiver Tri-State Control ■ Low-Cost WAN Solution ■ Loopback Function for Diagnostics ■ Software Selectable Interface Modes: -RS-232 (V.28), RS-423 (V.10) -RS-422 (V.11, X.21), RS-485 DESCRIPTION The SP522/524 is a monolithic device that supports three serial interface standards for Wide Area Network Connectivity. The SP522/524 is ideally suited for multi-protocol designs that are cost and space sensitive. The SP522/524 is fabricated using a low power BiCMOS process technology. Two (2) drivers and two (2) receivers for the SP522 can be configured via software for any of the above interface modes at any time. The SP524 offers two (2) additional drivers and two (2) additional receivers. VDD IN5819 +5V VDD 1N5819 +5V 10µF 10µF VSS VSS 10µF 10µF + + 10µF 28 VDD 2 VCC 14 19 29 VSS VCC VCC 10µF 31 DP0 32 DP1 SP524 LATCH_EN 30 DECODER LOGIC LOOPBCK 23 21 VDD 13 VCC 22 VSS SP522 8 DP0 7 DP1 DECODER LOGIC LATCH_EN 2 LOOPBCK 23 24 T1IN 36 ENT1 25 T2IN 35 ENT2 44 R1OUT 40 ENR1 43 R2OUT 39 ENR2 T1 T1OUTA 22 T1OUTB 20 T2OUTA 18 T2OUTB 17 R1INA 3 R1INB 4 R2INA 5 R2INB 6 T2 R1 10 T1IN 6 ENT1 9 T2IN 4 ENT2 1 R1OUT 5 ENR1 24 R2OUT 3 ENR2 T1 T1OUTA 11 T1OUTB 12 T2OUTA 15 T2OUTB 16 R1INA 18 R1INB 17 R2INA 20 R2INB 19 R2 LOOPBACK PATHS T2 LOOPBACK PATHS 26 T3IN 34 ENT3 27 T4IN 33 ENT4 42 R3OUT 38 ENR3 41 R4OUT 37 E...