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N74F269DB Datasheet(PDF) 5 Page - NXP Semiconductors |
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N74F269DB Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 19 page 74F269_5 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 05 — 25 March 2010 5 of 19 NXP Semiconductors 74F269 8-bit bidirectional binary counter 5. Pinning information 5.1 Pinning 5.2 Pin description [1] One FAST Unit Load (UL) is defined as 20 μA in HIGH state, 0.6 μA in LOW state. Fig 5. Pin configuration SO24 and SSOP24 package 74F269 U/D PE Q0 D0 Q1 D1 Q2 D2 Q3 D3 Q4 VCC GND D4 Q5 D5 Q6 D6 Q7 D7 CP TC CEP CET 001aai981 1 2 3 4 5 6 7 8 9 10 11 12 14 13 16 15 18 17 20 19 22 21 24 23 Table 2. Pin description Symbol Pin Description Unit load HIGH/LOW Load value[1] HIGH/LOW U/D 1 up or down count control input 1.0/1.0 20 μA/0.6 mA Q0 to Q7 2, 3, 4, 5, 6, 8, 9, 10 data output 50/33 1.0 mA/20 mA GND 7 ground (0 V) - - CP 11 clock input 1.0/1.0 20 μA/0.6 mA CEP 12 count enable parallel input (active LOW) 1.0/1.0 20 μA/0.6 mA CET 13 count enable trickle input (active LOW) 1.0/1.0 20 μA/0.6 mA TC 14 terminal count output (active LOW) 50/33 1.0 mA/20 mA D0 to D7 23, 22, 21, 20, 18, 17, 16, 15 data input 1.0/1.0 20 μA/0.6 mA VCC 19 supply voltage - - PE 24 parallel enable input (active LOW) 1.0/1.0 20 μA/0.6 mA |
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