E.Atkin, S.Kondratenko, Yu.Mishin, A.Pleshko, Yu.Volkov, Moscow Engineering Physics Institute, Abram Goldsher, Research Institute "Pulsar", Moscow, Vladimir Chernikov, Research Institute "Pulse Technique", Moscow !! The paper considers finished 16-channel printed circuit units (PCUs), intended to read out and process preliminary the signals of multi-wire chambers. The given units are a development of the PCUs presented at the 3-rd and 4-th Workshops [1,2]. Their characteristics reflect the trends in reducing unit dimensions at channel number increasing. The PCUs are built with 8-channel ICs of amplifier-shapers and discriminators. These ICs are implemented with the earlier designed semicustom array, made application specific for physical experiments and described in the proceedings of the 3-rd Workshop. The semicustom array was manufactured by an npn bipolar technology with unity-gain frequencies above 6 GHz (at 1 mA). The schematic diagrams and basic characteristics of these ICs are presented. Their standard input dynamic range makes up 5..200 uA. The discriminator (high-speed comparator) outputs provide a quasidifferential output in the GTL standard. The considered units are implemented with 4-layer PCBs measuring 90*40 mm.sq. ICs and other components are mounted by surface mount technology. The unit is connected with the detector by four 10-pin FPC connectors Harwin F10. At the unit`s output a 40-pin Hirose connector with a pitch of 1.27 mm is used. Two modifications of the PCU (lower one UP25411L and upper one UP25411U), capable to be joined in a bookstand manner, forming a 32-channel unit, have been manufactured. The mount density increases thereat up to the value of 1 front-end channel per 1 cm.cub. The basic electrical characteristics of UP25411U/L are presented below. Transresistance, kOhm 25 Input resistance, Ohm 330 Shaper output rise time, ns 10 Output pulse duration at base level, ns 50 Shaper output full swing, V 2,5 Range of comparator threshold setting, mV 10..2000 Comparator rise time at C load = 5pF, ns 3 Comparator fall time at C load = 5pF, ns 5 Comparator propagation delay, ns 8 Power consumption per channel, mW 40 Supply voltage, V +-3 The features of the PCUs are first of all the large maximal output amplitude of the amplifier-shaper (not less than 2.5 V), allowing to use the amplifier-comparator channel not only for timing signal generation, but also to store and process amplitude information. Moreover, at a standard dynamic range of 100 (from noise and up to the maximal amplitude) this allows operation with higher comparator thresholds and thereby reduce problems with pick-up and cross-talk in a multichannel system. The general view of the PCUs is presented. At present a new modification of the ICs is prepared, having a greater input sensitivity (gain of preamp). 1. E.Atkin , Yu.Volkov, I. Ilyushchenko, S.Kondratenko, Yu. Mishin, P.Khlopkov, V.Chernikov, V.Subbotin, S.Tsvetkov,- Eight-channel PCBs for wire tracking detectors. Proceeding of the Third Workshop on Electronics, for LHC Experiments, London, September 22-26, CERN/LHCC/97-60, 21 October 1997, p.463-465. 2. E.Atkin, Yu.Volkov, S.Kondratenko, Yu.Mishin, A.Pleshko, 16-channel PCUs for processing signals of multiwire chambers. A functionally oriented semicustom array. Proceedings of the Fourth Workshop on Electronics for LHC Experiments, Rome, September 21-25, 1998, CERN/LHCC/98-36, 30 October 1998, p.555-559. !! The paper considers finished 16-channel printed circuit units (PCUs), intended to read out and process preliminary the signals of multiwire chambers. Their characteristics reflect the trends in mount density increase (up to 1 front-end channel per 1 cm.cub.). The PCUs are built with 8-channel ICs of amplifier-shapers and discriminators based on application specific semicustom array. The considered units are implemented with 4-layer PCBs measuring 90*40 mm.sq, which may be combined into a 32-channel unit. ICs and other components are mounted by surface mount technology. The basic electrical characteristics of PCUs and ICs are presented. !!