74lvc169bq NXP Semiconductors, 74lvc169bq Datasheet - Page 6

• Manufacturer Part Number: 74lvc169bq
• Description: Presettable Synchronous 4-bit Up/down Binary Counter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7. Functional description
9397 750 13818
Product data sheet
7.1 Function table
Table 4:
[1]
Operating
modes
Parallel load
(Dn
Count up
(increment)
Count down
(decrement)
Hold (do
nothing)
Fig 6. State diagram.
H = HIGH voltage level steady state.
h = HIGH voltage level one setup time prior to the LOW-to-HIGH clock transition.
L = LOW voltage level steady state.
l = LOW voltage level one setup time prior to the LOW-to-HIGH clock transition.
qn = Lower case letters indicate state of referenced output prior to the LOW-to-HIGH clock transition.
X = Don’t care.
* = The TC is LOW when CET is LOW and the counter is at terminal count.
Terminal count up is (HHHH) and terminal count down is (LLLL).
= LOW-to-HIGH clock transition.
Qn)
Function table
Input
CP
Rev. 04 — 14 October 2004
U/D
X
X
h
I
X
X
[1]
Presettable synchronous 4-bit up/down binary counter
15
14
13
12
0
CEP
X
X
I
I
h
X
count down
count up
11
1
CET
X
X
I
I
X
X
10
2
3
9
001aaa647
PE
I
l
h
h
h
h
4
5
6
7
8
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Dn
I
h
X
X
X
X
74LVC169
Output
Qn
L
H
count up *
count
down
qn
qn
TC
*
*
*
*
H
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