TaNCap™ IEEE 1284 Integrated Filter Network Welwyn Components QRC1284x2™ Series • Single chip parallel port solution • Small 28-pin QSOP package • Built-in ESD protection into 17 lines • Highly integrated - Replaces 43 discretes • Proven TaNCap™ Thin film technology Electrical Data Resistors Capacitors % ±10 ±20 ppm/°C ±100 N/A -40 to +85 -40 to +85 0.1 per resistor N/A Tolerance TCR Operating temperature range °C Maximum power dissipation watts Operating voltage volts ±6 volts The 28-pin in QSOP package offers a high level of integration in a single surface mount device. 43 discrete passive components are replaced by one IEEE 1284x2 filter network. The TaNCap™ QRC1284x2 is a single package solution designed for the IEEE1284 enhanced parallel port interface and other digital interface applications. This highly integrated TaNCap™ thin film technology network offers four different functions in a single 28-pin QSOP package. The TaNCap series of resistor-capacitor networks are manufactured using military and space proven tantalum nitride thin film technology. For high reliability combined with superior performance. R1 is a pull-up resistor for, R2 is a series termination resistor and C is a low pass filter capacitor. ESD protection is provided for each termination line. Schematic Gnd 28 R1 ds C 27 R1 C ds R1 ds C 26 R1 C ds 25 R1 2 R1 C 23 22 21 R1 C R1 3 ds C R2 4 ds 20 C R2 ds 5 R1 C R2 ds 6 ds 19 R1 ds R2 1 24 Vcc C 18 R1 C ds ds R2 8 9 R1 ds C ds R2 7 R1 17 R1 C C 10 16 R1 11 12 R1 C C ds ds R2 15 C ds R2 13 R1 ds R2 14 = ESD diode structure General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn’s own data and is considered accurate at time of going to print. A subsidiary of TT electronics plc © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com 82 Issue B · 03.02 TaNCap™ IEEE 1284 Integrated Filter Network Welwyn Components QRC1284x2™ Series QRC1284x2 Pin-Out Chart Signal Source (compatible model) Termination Filter Pull-up 1284x2 ESD* 1284x2 ESD* Circuit Resistor R2 Capacitor Resistor R1 Pin Protection Pin Protection Diagram Data 1 Bi-directional X X X 25 8KV 4 8KV 1 Data 2 Bi-directional X X X 24 8KV 5 8KV 1 Data 3 Bi-directional X X X 23 8KV 6 8KV 1 Data 4 Bi-directional X X X 21 8KV 7 8KV 1 Data 5 Bi-directional X X X 19 8KV 9 8KV 1 Data 6 Bi-directional X X X 18 8KV 11 8KV 1 Data 7 Bi-directional X X X 17 8KV 13 8KV 1 Data 8 Bi-directional X X X 16 8KV 14 8KV 1 nAck Peripheral X X 15 8KV 2 Busy Peripheral X X 12 8KV 2 PError Peripheral X X 10 8KV 2 Select Peripheral X X 8 8KV 2 nFault Peripheral X X 27 8KV 2 nInit Host X X 1 8KV 2 nSelectln Host X X 2 8KV nStrobe Host X X 26 8KV nAutoFd Host X X 28 8KV X 2 3 8KV 1 2 * Human body model per MIL-STD-883 Method 3015. Circuit diagram 1 Circuit diagram 2 Vcc Vcc R1 R1 R2 8KV ESD Protection 8KV ESD Protection C 8KV ESD Protection C ds ds For specific pin numbers, refer to Pin-out table above For specific pin numbers, refer to Pin-out table above ds = ESD diode structure © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com Issue B · 03.02 83