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74LVC169DB 데이터시트(PDF) 2 Page - NXP Semiconductors

부품명 74LVC169DB
상세설명  Presettable synchronous 4-bit up/down binary counter
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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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