(425) 776 - 1880, fax: (425) 776 - 2760, ple - sales@pletronics.com, www.pletronics.com 18 true ttl series p1145 (full size) or st2245 (half size) metal clock oscillat or true ttl output without enable/disable lower emi due to lower ringing noise (overshoot/undershoot) available in thru-hole or surface mount configuration 4.000 mhz ? 60.000 mhz standard specifications overall frequency stability 50 ppm or 25 ppm over operating temperature range operating temperature range 0 to +70 c is standard, but can be extended to - 40 to +85 c for certain frequencies supply voltage (vcc) 5.0 volts 10% symmetry (duty cycle) 40/60 to 60/40% is standard, but 45/55% at vcc = 1.4 volts i s also available (see waveform 1) logic levels 2.4 volts min; 0.4 volts max output load can drive up to 10 ttl loads + 15pf (typ. 1 asic), see test circuit 4 (consult factory for heavier loads) supply current icc (ma) rise and fall time tr & tf (ns) frequency range (mhz) typical maximum typical maximum 4.000 ? 7.999 23.0 28.0 4.0 5.0 8.000 ? 15.999 24.0 28.0 3.0 4.0 16.000 ? 21.999 24.0 28.0 2.5 3.5 part numbering guide p11 45 e - 60.0m - 30 - smd - xxx (internal code or blank) consult factory for available frequencies and specs. not all options available for all frequencies. a special part numbe r may be assigned. mechanical: not to scale inches (mm) jun 2004 22.000 ? 60.000 27.0 32.0 2.0 3.0 frequency stability is inclusive of frequency shifts due to calibration, temperature, supply voltage, shock, vibration a nd load ringing noise depends on frequency and output load. see emi application no te solder pad layout may use any combination of pins 1, 7, 8 & 14 shown. recommended pad size is .12 (3.1) x .07 (1.8) typical. pl tronics, inc. .807 (20.5) max pletronics .500 (12.7) max .247 (6.28) max .560 (14.23) max .300 (7.62) .200 (5.08) typ 1 1 1 14 14 14 8 8 8 7 7 7 .820 (20.84) max .767 (19.49) .600 (15.24) packaging tube or on pads, smd: bulk logic ? 1 ? logic ? 0 ? due to part size and factory abilities, part marking may var y from lot to lot and may contain our part number or an inte rnal code. model frequency stability 45 = 50 ppm 44 = 25 ppm frequency in mhz special specifications (choose all that apply) blank: std specs (0 to +70 c, 40/60% symmetry) e: extended operating temperature range (- 40 to +85 c) p: 45/55% symmetry at vcc = 1.4 volts surface mount option non-std output load blank = 15 pf max, 30 = 30 pf max p11 = full size st22 = half size pl tronics , inc. 19013 36th ave. w, suite h lynnwood, wa 98036 usa manufacturer of high quality frequency control products . .807 (20.5) max .500 (12.7) max .200 (5.08) max .600 (15.24) .300 (7.62) 1 7 14 8 out gnd n.c. vcc .031 (0.8) .250 (6.35) max .020 (.51) p1145 full size smd version st2245 half size smd version solder pads portions of the part number that appear after the frequency may not be marked on part (c of c provided) .200 (5.08) .300 (7.62) 8 4 5 .136 x .035 .354 (9.0) (3.45) x (.89) pad (8x) .492 (12.5) max ple .492 (12.5) max .270 (6.87) max 1 4 8 5 1 .492 (12.5) max .492 (12.5) max .236 (6.0) max .492 (12.5) max .300 (7.62) .492 (12.5) max .300 (7.62) 5 8 4 1 out gnd n.c. vcc .020 (.51) .250 (6.35) max .031 (0.8) true ttl page 18
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