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ITS1A/ITS1B datasheet EN

Biduleohm
Dec 21st, 2019
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  1.  
  2. +---------------+
  3. | ITS1A / ITS1B |
  4. +---------------+
  5.  
  6. Digital single digit cold cathode indicator tube designed to display numbers from 0 to 9. Glass body, end view, flexible leads.
  7.  
  8.  
  9.  
  10. Tube viewed from the bottom:
  11.  
  12. subcathode
  13. ---------------
  14. 2nd grid | 6 7 8 | segment A
  15. | --a-- |
  16. segment B | 5 | | 9 | segment F
  17. | b f |
  18. cathode | 4 | | 10 | segment G
  19. | --g-- |
  20. segment C | 3 | | 11 | segment E
  21. | c e |
  22. 1st anode | 2 | | 12 | segment D
  23. | --d-- |
  24. | 14 |
  25. ---------------
  26. 2nd anode
  27.  
  28. +---------------------------+
  29. | Pin assignment |
  30. +-----+---------------------+
  31. | Pin | Electrode name |
  32. +-----+---------------------+
  33. | 1 | NC |
  34. | 2 | 1st anode |
  35. | 3 | 1st grid, segment C |
  36. | 4 | cathode (GND) |
  37. | 5 | 1st grid, segment B |
  38. | 6 | 2nd grid |
  39. | 7 | subcathode |
  40. | 8 | 1st grid, segment A |
  41. | 9 | 1st grid, segment F |
  42. | 10 | 1st grid, segment G |
  43. | 11 | 1st grid, segment E |
  44. | 12 | 1st grid, segment D |
  45. | 13 | NC |
  46. | 14 | 2nd anode |
  47. +-----+---------------------+
  48.  
  49.  
  50.  
  51. +----------------------------------------------------------------------------------+
  52. | Mechanical data |
  53. +------------------------------+------------+------------+------------+------------+
  54. | | Minimum | Typical | Maximum | Unit |
  55. +------------------------------+------------+------------+------------+------------+
  56. | vibrations: | | | | |
  57. | - frequency range | 1 | | 600 | Hz |
  58. | - acceleration | | | 49 | m/s^2 |
  59. | | | | 5 | G |
  60. +------------------------------+------------+------------+------------+------------+
  61. | multiple impacts: | | | | |
  62. | - acceleration | | | 392 | m/s^2 |
  63. | | | | 40 | G |
  64. | - duration | | | 10 | ms |
  65. +------------------------------+------------+------------+------------+------------+
  66. | single impact: | | | | |
  67. | - acceleration | | | 1472 | m/s^2 |
  68. | | | | 150 | G |
  69. | - duration | | | 3 | ms |
  70. +------------------------------+------------+------------+------------+------------+
  71. | acoustic noise: | | | | |
  72. | - frequency range | 50 | | 10000 | Hz |
  73. | - sound pressure level | | | 140 | dB |
  74. +------------------------------+------------+------------+------------+------------+
  75. | ambient temperature | -60 | | 85 | °C |
  76. +------------------------------+------------+------------+------------+------------+
  77. | relative humidity | | | 98 | % |
  78. +------------------------------+------------+------------+------------+------------+
  79. | minimum atmospheric pressure | 666 (5) | | | Pa (mm Hg) |
  80. +------------------------------+------------+------------+------------+------------+
  81. | maximum atmospheric pressure | | | 294198 (3) | Pa (bar) |
  82. +------------------------------+------------+------------+------------+------------+
  83. | tube dimensions: | | | | |
  84. | - height | | 27.3 | 28.5 | mm |
  85. | - width | | 17.5 | 18.6 | mm |
  86. | - depth | | 31.0 | 35.0 | mm |
  87. +------------------------------+------------+------------+------------+------------+
  88. | leads dimensions: | | | | |
  89. | - length | 40 | 45 | | mm |
  90. | - diameter | | 0.5 | 0.7 | mm |
  91. +------------------------------+------------+------------+------------+------------+
  92. | digit dimensions: | | | | |
  93. | - height | | 15.9 | | mm |
  94. | - width | | 8.4 | | mm |
  95. +------------------------------+------------+------------+------------+------------+
  96. | weight | | 16 | 25 | g |
  97. +------------------------------+------------+------------+------------+------------+
  98. | operating time | 5000 | | | h |
  99. +------------------------------+------------+------------+------------+------------+
  100. | shelf life | 12 | | | years |
  101. +------------------------------+------------+------------+------------+------------+
  102.  
  103.  
  104.  
  105. +-----------------------------------------------------------------------------------------------------------+
  106. | Electrical data |
  107. +-------------------------------------------------------+------------+------------+------------+------------+
  108. | | Minimum | Typical | Maximum | Unit |
  109. +-------------------------------------------------------+------------+------------+------------+------------+
  110. | glow color | | green | | |
  111. +-------------------------------------------------------+------------+------------+------------+------------+
  112. | segment luminance | 80 | | | cd/m^2 |
  113. +-------------------------------------------------------+------------+------------+------------+------------+
  114. | background luminance | | | 5 | cd/m^2 |
  115. +-------------------------------------------------------+------------+------------+------------+------------+
  116. | luminance unevenness | | | | |
  117. | - between segments | | | +/- 50 | % |
  118. | - along a segment | | | 80 | % |
  119. +-------------------------------------------------------+------------+------------+------------+------------+
  120. | viewing angle | | 120 | | degrees |
  121. +-------------------------------------------------------+------------+------------+------------+------------+
  122. | readiness time in the dark | | | 90 | s |
  123. +-------------------------------------------------------+------------+------------+------------+------------+
  124. | subcathode voltage | -265 | | -235 | V |
  125. +-------------------------------------------------------+------------+------------+------------+------------+
  126. | 1st anode voltage (continuous or alternating) | 36 | | 44 | V |
  127. +-------------------------------------------------------+------------+------------+------------+------------+
  128. | 2nd anode voltage (continuous or alternating) | 90 | | 110 | V |
  129. +-------------------------------------------------------+------------+------------+------------+------------+
  130. | 2nd anode voltage needed for discharge initiation: | | | | |
  131. | - in the presence of a control signal on 1st grid | | | 86 | V |
  132. | - in the absence of a control signal on 1st grid | 120 | | | V |
  133. +-------------------------------------------------------+------------+------------+------------+------------+
  134. | 1st and 2nd grids voltage high: | | | | |
  135. | - ITS1A | 0.4 | | 4 | V |
  136. | - ITS1B | 0.4 | | 5 | V |
  137. +-------------------------------------------------------+------------+------------+------------+------------+
  138. | 1st and 2nd grids voltage low | -0.3 | | 0.4 | V |
  139. +-------------------------------------------------------+------------+------------+------------+------------+
  140. | 1st and 2nd grids pulse width | 100 | | | µs |
  141. +-------------------------------------------------------+------------+------------+------------+------------+
  142. | 1st and 2nd anodes pulse width low while | | | | |
  143. | 1st anode < 4V and 2nd anode < 10 V | 500 | | | µs |
  144. +-------------------------------------------------------+------------+------------+------------+------------+
  145. | recovery time | 500 | | | µs |
  146. +-------------------------------------------------------+------------+------------+------------+------------+
  147. | preparatory discharge total current | | | 700 | µA |
  148. +-------------------------------------------------------+------------+------------+------------+------------+
  149. | average currents: | | | | |
  150. | - 1st grid | | 40 | | µA |
  151. | - 2nd grid | | 30 | | µA |
  152. | - 1st anode | | -100 | | µA |
  153. | - 2nd anode | | 200 | | µA |
  154. | - subcathode | | -100 | | µA |
  155. +-------------------------------------------------------+------------+------------+------------+------------+
  156. | average power received by one segment: | | | | |
  157. | - from power circuits | 50 | | | mW |
  158. | - from the control signal | 0.2 | | | mW |
  159. +-------------------------------------------------------+------------+------------+------------+------------+
  160.  
  161.  
  162.  
  163. +-----------------+
  164. | Timing diagram |
  165. +-----------------+
  166. ____ _____________
  167. 1st anode \___________________/
  168. ____ _____________
  169. 2nd anode \___________________/
  170.  
  171. segment ON XXXXXXXXXXXXXXXXXXXXXXXXXX\_______/XXX
  172. _______
  173. segment OFF XXXXXXXXXXXXXXXXXXXXXXXXXX/ \XXX
  174. ___
  175. 2nd grid ____________________________/ \_____
  176. | | | | | | | | | |
  177. time (µs) 0 100 200 300 400 500 600 700 800 900
  178.  
  179.  
  180.  
  181. +-----------------+
  182. | Recommendations |
  183. +-----------------+
  184.  
  185. /!\ The flexible leads should be soldered at least 10 mm away from the glass body and bends should be made at least 3 mm away from the glass body in order to avoid cracking of the glass.
  186.  
  187. /!\ Increasing the voltage of the 2nd anode to a value greater than 120 V can lead to failure of the tube due to a sharp increase of the current.
  188.  
  189. The tube doesn't require external current limiting resistors.
  190.  
  191. After storage of more than 1 month it is recommended to pre-apply working voltages for a period of at least 10 minutes before use.
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