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74LVC169DB 데이터시트(PDF) 2 Page - NXP Semiconductors |
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74LVC169DB 데이터시트(HTML) 2 Page - NXP Semiconductors |
2 / 22 page 74LVC169_5 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 — 8 June 2009 2 of 22 NXP Semiconductors 74LVC169 Presettable synchronous 4-bit up/down binary counter In order for counting to occur, both pins CEP and CET must be LOW and pin PE must be HIGH. The pin U/D input determines the direction of the counting. The terminal count output pin TC output is normally HIGH and goes LOW, provided that pin CET is LOW, when a counter reaches 15 in the count up mode.The pin TC output state is not a function of the count-enable parallel (pin CEP) input level. Since pin TC signal is derived by decoding the flip-flop states, there exists the possibility of decoding spikes on pin TC. For this reason the use of pin TC as a clock signal is not recommended; see the following logic equations: 2. Features I 5 V tolerant inputs for interfacing with 5 V logic I Wide supply voltage range from 1.2 V to 3.6 V I CMOS low power consumption I Direct interface with TTL levels I Up/down counting I Two count enable inputs for n-bit cascading I Built-in look-ahead carry capability I Presettable for programmable operation I Complies with JEDEC standard JESD8-B / JESD36 I ESD protection: N HBM JESD22-A114D exceeds 2000 V N CDM JESD22-C101C exceeds 1000 V I Multiple package options I Specified from −40 °Cto+85 °C and from −40 °C to +125 °C. 3. Ordering information count enable CEP CET PE • • = count up: TC Q3 Q2 Q1 Q0 CET U D ⁄ • • • • • = count down: TC Q3 Q2 Q1 Q0 CET U D ⁄ • • • • • = Table 1. Ordering information Type number Temperature range Package Name Description Version 74LVC169D −40 °C to +125 °C SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 74LVC169DB −40 °C to +125 °C SSOP16 plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1 74LVC169PW −40 °C to +125 °C TSSOP16 plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1 74LVC169BQ −40 °C to +125 °C DHVQFN16 plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 16 terminals; body 2.5 × 3.5 × 0.85 mm SOT763-1 |
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