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74ALVT16501 Datasheet PDF : 20 Pages
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Philips Semiconductors
74ALVT16501
18-bit universal bus transceiver; 3-state
Table 3:
Symbol
VCC
B2
B1
GND
B0
CPAB
GND
Pin description …continued
Pin
Description
50
voltage supply
51
data input or output (B side)
52
data input or output (B side)
53
ground (0 V)
54
data input or output (B side)
55
A-to-B clock input (active rising edge)
56
ground (0 V)
7. Functional description
7.1 Function table
Table 4: Function table [1]
Operating mode
Control
OEAB
OEBA
Disabled
L
Disabled, latch data L
LEAB
LEBA
H
↓
Disabled, hold data
L
L
Disabled, clock data L
L
Transparent
H
H
Latch data and display H
↓
Clock data and display H
L
Hold data and display H
L
CPAB
CPBA
X
X
H or L
↑
X
X
↑
H or L
Input
An
Bn
X
h
l
X
h
l
H
L
h
l
h
l
X
X
[1] H = HIGH voltage level;
h = HIGH voltage level one setup time prior to the enable or clock transition;
L = LOW voltage level;
I = LOW voltage level one setup time prior to the enable or clock transition;
NC = no change;
X = don’t care;
Z = high-impedance OFF-state;
↓ = HIGH-to-LOW enable or clock transition;
↑ = LOW-to-HIGH enable or clock transition.
Internal
registers
X
H
L
NC
H
L
H
L
H
L
H
L
H
L
Output
Bn
An
Z
Z
Z
Z
Z
Z
H
L
H
L
H
L
H
L
74ALVT16501_4
Product data sheet
Rev. 04 — 8 August 2005
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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