UT54ACS245

Standard Products UT54ACS245/UT54ACTS245 Octal Bus Transceiver with Three-State Outputs Datasheet November 2010 www.aeroflex.com/logic FEATURES ‰ Three-state outputs drive bus line directly ‰ 1.2μ CMOS - Latchup immune ‰ High speed ‰ Low power consumption ‰ Single 5 volt supply ‰ Available QML Q or V processes ‰ Flexible package - 20-pin DIP - 20-lead flatpack ‰ UT54ACS245 - SMD 5962-96572 ‰ UT54ACTS245 - SMD 5962-96573 DESCRIPTION The UT54ACS245 and the UT54ACTS245 are non-inverting octal bus transceivers designed for asynchronous two-way communication between data buses. The control function implementation minimizes external timing requirements. The devices allow data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction control (DIR) input. The enable input (G) disables the device so that the buses are effectively isolated. The devices are characterized over full military temperature range of -55°C to +125°C. FUNCTION TABLE ENABLE DIRECTION G CONTROL DIR OPERATION LL B Data To A Bus LH A Data To B Bus HX Isolation PINOUTS DIR A1 A2 A3 A4 A5 A6 A7 A8 VSS 20-Pin DIP Top View DIR 1 20 VDD A1 2 19 G A2 3 18 B1 A3 4 17 B2 A4 5 16 B3 A5 6 15 B4 A6 7 14 B5 A7 8 13 B6 A8 9 12 B7 VSS 10 11 B8 20-Lead Flatpack Top View 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VDD G B1 B2 B3 B4 B5 B6 B7 B8 LOGIC SYMBOL (19) G (1) DIR (2) A1 (3) A2 (4) A3 (5) A4 (6) A5 (7) A6 (8) A7 A8 (9) G3 3 EN1 (BA) 3 EN...