BULLETIN NO. 1132C June 15, 1968 The B-5750 NIXIE tube is an ultra-long life, high quality, cold-cathode indicator tube having a common anode. It can display the numerals 0-9 and has two decimal points inside the tube (right and left of the numerals) which are inde- pendently operable. The numeral aspect ratio (height to width) has been designed to provide the optimum in readability and viewing distance. The small diameter of the tube (0.530 max) per- mits 0.540 center-to-center mounting and its short seated height (1.500 max including standoff) allows for minimal instrument panel dimensions. A moveable pin-straightener-standoff, which is ANODE used to align the tube pins for ease of PC layout schtlhence and insertion, is part of the tube assembly. The standoff also allows solder gas to escape during soldering. These tubes have been specifically designed to operate both in normal DC applica- tions and strobed/time sharing applications (See Note 8). The B-5750S is identical to the B-5750 except its leads are cut to 0.175" + .015 for use with : the SK-207 socket, Bulletin 1138. BOTTOM VIEW Figure 1. OUTLINE DRAWING (NOTE 11)Pin OIA O17 MAX. TYP + bw .090 +.004 268 5 SP @ .090+.004 t.004 @ @ 4804.004 TOL NON- | CUMULATIVE a % > + + 097 t.002 = { .2644.004~ VIEW Figure 2. PIN LAYOUT (TOP VIEW) VIEW | PIN 7 Figure 3a. P.C. LAYOUT WITH FAIRCHILD 9960 (TOP VIEW) (9960 notch away from viewer) VIEW Te se 14@ of |0@e {le \2e e6 e5 o4 013 @3 e2 el Figure 4. BASING DIAGRAM (BOTTOM VIEW) +170Vdc o ++ CONNECTIONS NUMERAL NUMERAL NUMERAL. NUMERAL NUMERAL NUMERAL ANODE NUMERAL NUMERAL 10 ANODE ul NUMERAL t2 NUMERAL 13 RT DEC PT 14 LFT DEC PT v D/O) NH) On Sion) iS OC} 0] ea] Vj &1D| on) ajo | *Anode pins are connected internally Table 1. PIN CONNECTIONS A Rp * To test for lonization at +170 Vdc Figure 5. TEST CIRCUITENVIRONMENTAL SPECIFICATIONS Shock ............, 250 gs, 1.0 msec., 20 total shocks Ambient temperature 20 to +55C X1, X2, Yl and Y2 planes 40 to 70C (reduced life) Thermal Shock ..... 15 sec., 90C water - immediate trans- Altitude ........... 70,000 ft. fer to 30C water, 15 seconds Vibration .......... 10-50-10 cps., 08 total excursion Life Expectancy 50-2000 cps 10 gs 15 minutes (dynamic) ........ (200,000 hours) (Note 10) X1, X2, Y1 planes NOTES 1. The minimum supply voitage should be +170 Vdc, however, the use of the highest voltage available with an appropriate WwW NOU series resistor is recommended to provide: 1) greater tolerance of B+ & Rp; 2) more uniform brightness; 3) more constant current operation; 4) improved operation with temperature and 5) improved life. (See Table 2 and Note 7) This NIXIE tube can be used in 4 modes of operation (Figure 5) a) When a numeral is always on and a decimal point will never be on. b) When a numeral is always on and a decimal point may or may not be on. c) When a numeral is always on and a decimal point is always on. d) When a numeral or a decimal point will be on but not at the same time (numeral or decimal point are lighted alone) use the anode resistor plus a decimal point resistor. In cases a, b and c, only the limiting anode resistor is necessary. (See Table 2) NOTE: In cases a, b and c, a numeral must be on when the decimal point is on to prevent the decimal point from receiving excessive current. Supply Voltage (Vdc) 170 200 250 300 Anode Resistor (Rp) (kQ) 9.1 20 43 62 Decimal point resistor (Rkd) (k2) 120 270 560 750 Table 2 . For proper viewing the tube should be oriented so that pins 7 and 6 are closest to the viewer (Figure 4.) . As noted on the tube outline drawing (Figure 1) an external portion of the tube is at the anode potential. CAUTION should be exercised. . Value when decimal point is off. . Value when only the decimal point is on. For proper NIXIE tube operation, a load line must pass through the operating region (shaded area) above point A and below point B in Figure 6. Operation at an anode current below point A can result in partial or incomplete numeral glow. Operation at an anode current above point B can result in not only spurious numeral glow but also shorter life. Typical load lines for 170 Vdc-10 kQ, 200 Vdc-22 kn, 250 Vde-43 kn, and 300 Vdc-62 kQ are shown. The limits of the operating region were determined at the 330 V-100 kQ, 330 V-51.4 kQ. At these limits the tubes will exhibit an anode current within the limits of 1.8 ma min. and 3.5 ma max. These limits can be used to determine if a tube meets the specification. . In a typical strobed/time sharing application, (Figure 7) same-numeral cathodes (i.e., all 1s, all 2s, etc.) of all tubes are connected in parallel and the anodes are strobed sequentially. The rapid strobing is above the flicker rate and visual indication is normal. However, since the on duty cycle is not 100%, a higher than normal current is used to compensate for loss of brightness. The B-5750 NIXIE tubes are constructed and specified for these peak current con- ditions and no extraneous glow is exhibited during this operation. . The maximum pulse duration is 5.0 milliseconds with a 10% max duty cycle. 10. 11. Under normal DC operating conditions. Lead length on B-5750S is 0.175" + .015 (for use with SK-207 socket).TEST CONDITIONS 330 CONDITION A CONDITION B mri | NS p= ie] . 300 Epb = +60 Vdc OPEN Decimal point ON OFF TEST LIMITS ~ LIMIT A 2 250 Tube Drop = 150 Vde max. > LIMIT B ~ Tube Drop = 150 Vdc min. g i 200 > 173 Vde uw 170 150 z A 8 170V, 9.41kg ee, 132 Vde LOY 20K 2 t0oF ete x OPERATING Nor x REGION Ship l 1 Li l l 0 1.0 1.8 2.0 2.4 3.0 3.5 4.0 ANODE CURRENT (ma) Figure 6. TUBE CHARACTERISTICS (NOTE 7) SEQUENTIAL WORD-SELECT MEMORY BCD SENSE AMP REGISTER RING COUNTER ANODE ANODE ANODE DRIVER ORIVER ORIVER BCD TO DECIMAL DECODER DRIVER Figure 7. BLOCK DIAGRAM TYPICAL TIME SHARING APPLICATION (NOTE 8) . . The information contained in this brochure does not necessarily imply a license under patents or pending applications of Burroughs Corp. or Printed in U.S.A. assure a freedom from patent rights of others. No warranties of any kind are either expressed or implied by reason of this publication.