Audio Transformers - 77000 Series

Audio Transformers:

2 Ohm to 250K Ohm; 150Hz to 75KHz; 1 watt at 1KHz

SURFACE MOUNT
PICO surface mount units utilize materials and methods to withstand extreme temperatures of vapor phase, I.R., and other reflow procedures without degradation of electrical or mechanical characteristics.

Specifications

MIL-PRF-27: All units manufactured to MIL-PRF-27, Grade 5 Class S.
FREQUENCY RESPONSE: ± 3db, 150 Hz-75 KHz at 1.0 Milliwatt. (When primary impedence is greater or equal to 50K Ohms, ± 3db, 150 Hz-20 KHz).
MAXIMUM DISTORTION: 5% with rated power level at 1 KHz, 400 Hz, and 150Hz.
DIELECTRIC STRENGTH: All units tested at 200 V RMS.
INSULATION RESISTANCE: Greater than 10,000 Megohms at 300 V DC.
WEIGHT: 7.5 Grams
TERMINALS: Solderability per MIL-STD-202, Method 208.
THERMAL SHOCK: 25 Cycles, Method 107, MIL-STD-202, Test Condition -55º C to +130º C.
MOISTURE SENSITIVITY LEVEL: MSL3

Bottom View
Larger size drawing

Audio Transformers: 2 Ohm to 250K Ohm; 150Hz to 75KHz; 1 watt at 1KHz
PICO Part Number	Prim Imped Ohms	Secondary Impedence Ohms Split Windings		Power Watts			Prim Unbal DC Current ma	Prim DC Resist Ohms	Secondary DC Resistance OHMS		Turns Ratio PRIM/SEC		***** Prices 1-9 (US $)**
PICO Part Number	Prim Imped Ohms	SER CONN	PAR CONN	1KHz and higher	400 Hz and higher	150 Hz and higher	Prim Unbal DC Current ma	Prim DC Resist Ohms	SER CONN	PAR CONN	SEC SER CONN	SEC PAR CONN	***** Prices 1-9 (US $)**
77203 77205 77210 77215 77218	20ct 20ct 32ct 40ct 48ct	8ct 20ct 32ct 40ct 16ct	2 5 8 10 4	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	22.0 22.0 18.0 16.0 13.0	1.75 1.75 2.7 3 4.5	1.0 2.5 3.7 5.2 2.4	.25 .63 .93 1.3 .6	1.58:1 1:1 1:1 1:1 1.73:1	3.16:1 2:1 2:1 2:1 3.46:1	50.32 50.32 50.32 50.32 50.32
77220 77225 77228 77230 77235	50ct 80ct 100ct 100ct 120ct	50ct 32ct 40ct 100ct 12.8ct	12.5 8 10 25 3.2	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	13.0 11.0 10.0 10.0 9.0	4.5 6.6 9.7 9.7 10.8	6.2 3.7 5.6 11 1.6	1.6 .93 1.4 2.8 .4	1:1 1.58:1 1.58:1 1:1 3.06:1	2:1 3.16:1 3.16:1 2:1 6.12:1	50.32 50.32 50.32 50.32 50.32
77240 77245 77250 77255 77260	120ct 120ct 150ct 150ct 150ct	60ct 120ct 12ct 50ct 100ct	15 30 3 12.5 25	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	9.0 9.0 8.0 8.0 8.0	10.8 10.8 13.5 12 12	8.5 15 1.75 5.8 13	2.2 3.8 .44 1.5 3.3	1.41:1 1:1 3.54:1 1.73:1 1.22:1	2.83:1 2:1 7.08:1 3.46:1 2.44:1	50.32 50.32 50.32 50.32 50.32

PICO Part Number	Primy Imped Ohms	Secondary Impedence Ohms Split Windings		Power Watts			Prim Unbal DC Current ma	Prim DC Resist Ohms	Secondary DC Resistance OHMS		Turns Ratio PRIM/SEC		***** Prices 1-9 (US $)**
PICO Part Number	Primy Imped Ohms	SER CONN	PAR CONN	1KHz and higher	400 Hz and higher	150 Hz and higher	Prim Unbal DC Current ma	Prim DC Resist Ohms	SER CONN	PAR CONN	SEC SER CONN	SEC PAR CONN	***** Prices 1-9 (US $)**
77265 77270 77275 77280 77285	150ct 150ct 200ct 300ct 300ct	150ct 600ct 200ct 12ct 50ct	37.5 150 50 3 12.5	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	8.0 8.0 7.0 5.0 5.0	12 12 17 30 27	20 82 24 1.75 6.2	5 20.5 6.0 .44 1.6	1:1 1:2 1:1 5:1 2.45:1	2:1 1:1 2:1 10:1 4.9:1	50.32 50.32 50.32 50.32 50.32
77290 77295 77300 77305 77310	300ct 300ct 300ct 320ct 400ct	150ct 300ct 600ct 12.8ct 40ct	37.5 75 150 3.2 10	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	5.0 5.0 5.0 5.0 5.0	26 27 27 30 39	21 38 66 1.75 4.3	5.3 9.5 17 .44 1.1	1.41:1 1:1 1.41:1 5:1 3.16:1	2.83:1 2:1 1.41:1 10:1 6.32:1	50.32 50.32 50.32 50.32 50.32
77315 77320 77325 77330 77335	400ct 400ct 400ct 400ct 400ct	120ct 200ct 400ct 1000ct 2000ct	30 50 100 250 500	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	5.0 5.0 5.0 5.0 5.0	30 39 39 39 39	14 24 42 109 198	3.5 6 10.5 28 49	1.83:1 1.41:1 1:1 1:1.58 1:2.24	3.65:1 2.83:1 2:1 1.26:1 1:1.12	50.32 50.32 50.32 50.32 50.32
77340 77342 77344 77345 77347	400ct 500ct 500ct 500ct 500ct	4000ct 12.8ct 16ct 50ct 150ct	1000 3.2 4 12.5 37.5	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	5.0 4.5 4.5 4.5 4.5	39 43 43 43 43	436 1.6 2.3 5.8 19.8	109 .4 .56 1.5 5	1:3.16 6.25:1 5.6:1 3.16:1 1.83:1	1:1.58 12.5:1 11.2:1 6.32:1 3.65:1	50.32 50.32 50.32 50.32 50.32
77350 77355 77360 77365 77367	500ct *500ct 500ct 600ct 600ct	500ct 500ct 600ct 12.8ct 30ct	125 - 150 3.2 7.5	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	4.5 4.5 4.5 4.0 4.0	43 43 43 68 60	60 60 66 1.75 3.7	15 - 17 .44 .93	1:1 1:1 1:1.1 6.85:1 4.47:1	2:1 - 1.83:1 13.7:1 8.94:1	50.32 52.40 50.32 50.32 50.32
77370 77375 77380 77385 77386 77387	600ct 600ct 600ct 600ct 600ct 600ct	48ct 200ct 600ct 600ct 900ct 1200ct	12 50 150 - - 300	1.0 1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75 .75	.11 .11 .11 .11 .11 .11	4.0 4.0 4.0 4.0 4.0 4.0	60 60 60 60 60 60	5.9 25 66 68 104 116	1.5 6.3 17 - - 29	3.54:1 1.73:1 1:1 1:1 1:1.22 1:1.41	7.07:1 3.46:1 2:1 - - 1.41:1	50.32 50.32 50.32 52.40 52.40 50.32
77390 77395 77400 77405 77410	640ct 700ct 800ct 800ct 800ct	12.8ct 100ct 12.8ct 48ct 800ct	3.2 25 3.2 12 200	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	4.0 4.0 3.5 3.5 3.5	69 62 78 74 74	1.75 10.6 1.75 6 102	.44 2.7 .44 1.5 26	7.07:1 2.65:1 7.91:1 4.08:1 1:1	14.14:1 5.29:1 15.8:1 8.16:1 2:1	50.32 50.32 50.32 50.32 50.32
77415 77417 77420 77425 77430	900ct *900ct 1000ct 1000ct 1000ct	600ct 900ct 12ct 50ct 1000ct	150 - 3 12.5 250	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	3.0 3.0 3.0 3.0 3.0	90 90 115 100 75	66 102 1.75 5.8 103	17 - .44 1.5 26	1.23:1 1:1 9.13:1 4.47:1 1:1	2.45:1 - 18.26:1 8.94:1 2:1	50.32 52.40 50.32 50.32 50.32
77435 77440 77445 77450 77455	1060ct 1200ct 1200ct 1200ct *1200ct	12.8ct 12.8ct 500ct 1200ct 1200ct	3.2 3.2 125 300 -	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	3.0 3.0 3.0 3.0 3.0	115 122 113 113 109	1.75 1.75 63 155 150	.44 .44 16 39 -	9.1:1 9.68:1 1.55:1 1:1 1:1	18.2:1 19.4:1 3.1:1 2:1 -	50.32 50.32 50.32 50.32 52.40
77460 77465 77470 77475 77480	1500ct 1500ct 1500ct 1500ct 1600ct	12ct 500ct 600ct 1500ct 12.8ct	3 125 - - 3.2	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	2.5 2.5 2.5 2.5 2.5	140 150 150 150 140	1.75 60 66 168 1.75	.44 15 - - .44	11.18:1 1.73:1 1.58:1 1:1 11.18:1	22.36:1 3.46:1 - - 22.36:1	50.32 50.32 52.40 52.40 50.32

PICO Part Num.	Prim Imped Ohms	Secondary Impedence Ohms Split Windings		Power Watts			Prim Unbal DC Curr ma	Prim DC Resist Ohms	Secondary DC Resistance OHMS		Turns Ratio PRIM/SEC		***** Price 1-9 (US $)**
PICO Part Num.	Prim Imped Ohms	SER CONN	PAR CONN	1KHz and higher	400 Hz and higher	150 Hz and higher	Prim Unbal DC Curr ma	Prim DC Resist Ohms	SER CONN	PAR CONN	SEC SER CONN	SEC PAR CONN	***** Price 1-9 (US $)**
77483 77485 77490 77495 77497	2000ct 2000ct *2000ct 2000ct 2500ct	8ct 2000ct 2000ct 8000ct 2500ct	2 500 - 2000 625	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	2.0 2.0 2.0 2.0 2.0	250 185 175 185 245	1.0 255 240 1015 268	.25 64 - 254 68	15.8:1 1:1 1:1 1:2 1:1	31.6:1 2:1 - 1:1 2:1	50.32 50.32 52.40 52.40 52.40
77500 77505 77510 77512 77514	3000ct *3000ct 3600ct 4000ct 4000ct	3000ct 3000ct 3600ct 16ct 600ct	750 - 900 4 150	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	1.8 1.8 1.5 1.5 1.5	267 267 300 395 395	295 368 413 2.5 66	74 - 103 .65 17	1:1 1:1 1:1 15.8:1 2.58:1	2:1 - 2:1 31.6:1 5.16:1	52.40 52.40 50.32 50.32 50.32
77515 77520 77525 77530 77535	4000ct *4000ct 5000ct 5000ct 7500ct	1000ct 8000ct 500ct 5000ct 50ct	250 - 125 1250 12.5	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	1.5 1.5 1.3 1.3 1.0	395 390 450 450 670	108 955 62 620 6	27 - 16 155 1.5	2:1 1:1.41 3.16:1 1:1 12.25:1	4:1 - 6.32:1 2:1 24.5:1	50.32 52.40 50.32 50.32 55.85
77540 77545 77550 77555 77560	7500ct 7500ct 7500ct *7500ct 8000ct	100ct 600ct 2500ct 7500ct 12.8ct	25 150 625 - 3.2	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	1.0 1.0 1.0 1.0 1.0	670 670 670 670 765	11 66 268 925 1.75	2.8 16.5 67 - .44	8.66:1 3.54:1 1.73:1 1:1 25:1	17.32:1 7.07:1 3.46:1 - 50:1	55.85 55.85 55.85 61.59 55.85
77565 77570 77575 77580 77585 77590	8000ct 8000ct 9000ct 10,000ct 10,000ct 10,000ct	1000ct 1200ct 9000ct 12.8ct 16ct 100ct	250 - - 3.2 4 25	1.0 1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75 .75	.11 .11 .11 .11 .11 .11	1.0 1.0 1.0 1.0 1.0 1.0	695 715 925 768 756 780	106 153 1020 1.6 1.7 10	26.5 - - .4 .43 2.5	2.83:1 2.58:1 1:1 28:1 25:1 10:1	5.66:1 - - 56:1 50:1 20:1	55.85 61.59 61.59 55.85 55.85 55.85
77595 77600 77605 77610 77615	10,000ct 10,000ct 10,000ct 10,000ct 10,000ct	200ct 500ct 600ct 1000ct 1200ct	50 125 150 250 300	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	1.0 1.0 1.0 1.0 1.0	780 780 780 780 780	24 60 83 106 145	6 15 21 27 36	7.07:1 4.47:1 4.08:1 3.16:1 2.89:1	14.14:1 8.94:1 8.16:1 6.32:1 5.77:1	55.85 55.85 55.85 55.85 55.85
77620 77625 77630 77635 77640	10,000ct 10,000ct 10,000ct 10,000ct 10,000ct	1500ct 2000ct 5000ct 7500ct 10,000ct	375 500 1250 1875 2500	1.0 1.0 1.0 1.0 1.0	.75 .75 .75 .75 .75	.11 .11 .11 .11 .11	1.0 1.0 1.0 1.0 1.0	780 780 780 780 780	160 300 610 932 1075	40 75 153 233 269	2.58:1 2.24:1 1.41:1 1.16:1 1:1	5.16:1 4.47:1 2.83:1 2.31:1 2:1	55.85 55.85 55.85 55.85 55.85
77645 77650 77652 77655 77660	*10,000ct 15,000ct 15,000ct 15,000ct 15,000ct	10,000ct 400ct 500ct 600ct 10,000ct	- 100 125 150 2500	1.0 .66 .66 .66 .66	.75 .66 .66 .66 .66	.11 .11 .11 .11 .11	1.0 0.8 0.8 0.8 0.8	715 1165 1165 1165 1165	985 52 60 80 1050	- 13 15 20 263	1:1 6.12:1 5.48:1 5:1 1.22:1	- 12.25:1 10.95:1 10:1 2.45:1	61.59 55.85 55.85 55.85 55.85
77665 77670 77675 77680 77685	*15,000ct 15,000ct 16,000ct 20,000ct 20,000ct	15,000ct 15,000ct 1000ct 500ct 600ct	- 3750 250 125 150	.66 .66 .62 .5 .5	.66 .66 .62 .5 .5	.11 .11 .11 .11 .11	0.8 0.8 0.8 0.7 0.7	1165 1165 1560 1750 1750	1600 1600 108 60 82	- 400 27 15 20.5	1:1 1:1 4:1 6.32:1 5.77:1	- 2:1 8:1 12.65:1 11.55:1	61.59 55.85 55.85 55.85 59.90
77690 77695 77700 77705 77710	20,000ct 20,000ct 20,000ct 20,000ct *20,000ct	800ct 1000ct 5000ct 10,000ct 20,000ct	200 250 1250 2500 -	.5 .5 .5 .5 .5	.5 .5 .5 .5 .5	.11 .11 .11 .11 .11	0.7 0.7 0.7 0.7 0.7	1750 1750 1750 1750 1715	98 135 610 1075 2370	24.5 34 153 269 -	5:1 4.47:1 2:1 1.41:1 1:1	10:1 8.94:1 4:1 2.83:1 -	61.59 61.59 61.59 61.59 61.59

PICO Part Num.	Prim Imped Ohms	Secondary Impedence Ohms Split Windings		Power Watts			Prim Unbal DC Curr ma	Prim DC Resist Ohms	Secondary DC Resistance OHMS		Turns Ratio PRIM/SEC		***** Price 1-9 (US $)**
PICO Part Num.	Prim Imped Ohms	SER CONN	PAR CONN	1KHz and higher	400 Hz and higher	150 Hz and higher	Prim Unbal DC Curr ma	Prim DC Resist Ohms	SER CONN	PAR CONN	SEC SER CONN	SEC PAR CONN	***** Price 1-9 (US $)**
77715 77720 77725 77730 77732	25,000ct 25,000ct 30,000ct 30,000ct 30,000ct	500ct 1000ct 50ct 1200ct 500ct	125 250 12.5 300 125	.4 .4 .33 .33 .33	.4 .4 .33 .33 .33	.11 .11 .11 .11 .11	0.6 0.6 0.5 0.5 0.5	2470 2470 2730 2815 2730	60 106 6.2 156 61	15 27 1.6 39 15.3	7.07:1 5:1 24.5:1 5:1 7.7:1	14.14:1 10:1 49:1 10:1 15.5:1	62.19 61.59 61.59 62.19 62.19
77734 77735 77740 77745 77750	30,000ct 30,000ct 30,000ct *30,000ct 40,000ct	200ct 5000ct 10,000ct 30,000ct 400ct	50 1250 2500 - 100	.33 .33 .33 .33 .25	.33 .33 .33 .33 .25	.11 .11 .11 .11 .11	0.5 0.5 0.5 0.5 0.5	2730 2730 2730 2730 3150	24 620 1090 3740 53	6 155 272 - 13	12.2:1 2.45:1 1.73:1 1:1 10:1	24.5:1 4.9:1 3.46:1 - 20:1	62.19 62.19 62.19 66.77 66.77
77755 77760 77765 77770 77775	40,000ct 40,000ct 40,000ct *40,000ct 50,000ct	2000ct 4000ct 20,000ct 40,000ct 200ct	500 1000 5000 - 50	.25 .25 .25 .25 .2	.25 .25 .25 .25 .2	.11 .11 .11 .11 .11	0.5 0.5 0.5 0.5 0.4	3150 3150 3150 3940 4275	300 548 3075 4350 24	75 137 769 - 6	4.47:1 3.16:1 1.41:1 1:1 15.8:1	8.94:1 6.32:1 2.83:1 - 31.6:1	66.77 66.77 66.77 74.47 74.47
77777 77778 77779 77780 77785	50,000ct 50,000ct 50,000ct 60,000ct 62,500ct	500ct 600ct 50,000ct 15,000ct 50ct	125 150 12,500 3750 12.5	.2 .2 .2 .16 .16	.2 .2 .2 .16 .16	.11 .11 .11 .11 .11	0.4 0.4 0.4 0.4 0.4	4275 4275 4500 5960 5960	60 82 6270 1650 6	15 21 1568 412 1.5	10:1 9.13:1 1:1 2:1 35.4:1	20:1 18.26:1 2:1 4:1 70.7:1	74.47 74.47 74.47 80.63 80.63
77787 77789 77790 77795 77800	80,000ct 80,000ct 90,000ct 95,000ct 100,000ct	15,000ct 80,000ct 10,000ct 15,000ct 60ct	3750 20,000 2500 3750 15	.12 .12 .11 .1 .1	.12 .12 .11 .1 .1	.11 .11 .11 .10 .10	0.3 0.3 0.3 0.3 0.3	7200 7200 7500 9550 10,000	1690 9920 1350 1635 8.5	423 2480 338 410 2.2	2.3:1 1:1 3:1 2.5:1 40.8:1	4.6:1 2:1 6:1 5:1 81.6:1	80.63 80.63 84.28 84.28 84.28
77805 77810 77813 77814 77815	100,000ct 100,000ct 100,000ct 100,000ct 100,000ct	100ct 500ct 1000ct 2000ct 10,000ct	25 125 250 500 2500	.1 .1 .1 .1 .1	.1 .1 .1 .1 .1	.10 .10 .10 .10 .10	0.3 0.3 0.3 0.3 0.3	10,000 10,000 10,000 10,000 10,000	14 62 140 248 1075	3.5 15.5 35 62 270	31.6:1 14.1:1 10:1 7.07:1 3.16:1	63.2:1 28.3:1 20:1 14.14:1 6.32:1	84.28 84.28 84.28 84.28 84.28
77820 77823 77825 77830 77835	135,000ct 200,000ct 200,000ct 200,000ct 200,000ct	82ct 500ct 1000ct 10,000ct 20,000ct	20.5 125 250 2500 5000	.074 .05 .05 .05 .05	.074 .05 .05 .05 .05	.074 .05 .05 .05 .05	0.25 0.2 0.2 0.2 0.2	13,700 17,340 17,340 17,340 17,340	9.5 75 133 1350 3000	2.4 19 33 336 750	40.6:1 20:1 14.1:1 4.47:1 3.16:1	81.2:1 40:1 28.3:1 8.94:1 6.32:1	88.17 88.17 88.17 88.17 90.40
77837 77840	250,000ct 250,000ct	200ct 1000ct	50 250	.04 .04	.04 .04	.04 .04	0.2 0.2	17,340 17,340	28 118	7 30	35.4:1 15.8:1	70.7:1 31.6:1	90.40 90.40

* INCLUDES ELECTROSTATIC SHIELD

***Discount Prices:
1-9 Net;
10-24 less 10%;
25-49 less 16%;
50-99 less 23%;
100-499 less 30%

Ordering Instructions:
No minimum.
Net 30 days F.O.B. Pelham, NY
Delivery--stock to one week for sample orders.

Features
Extreme resistance to thermal shock
Ultra Miniature size
PICO is approved QPL source (MIL-PRF-27)
Magnetic shields available
Electrostatic shielding can be added
Variation of standard designs available
Primary and secondary windings can be used either as input or output
Every unit in this catalog can be made with a 300 thermal cycle guarantee using PICO's special SR construction. Contact factory for details.

Schematics
for Transformers
with Electrostatic Shield

Schematics
for Transformers
with Split Secondaries

Click Here For Plugin Version of the 77000 Series

RECOMMENDED LAND PATTERN DIMENSIONS

For immediate engineering assistance or to place an order:
Call Toll Free: 800-431-1064

PICO Electronics, Inc.

143 Sparks Ave. Pelham, NY 10803-1810
Tel: 914-738-1400 or Fax: 914-738-8225

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