SN74ALVCH16831
1-TO-4 ADDRESS REGISTER/DRIVER
WITH 3-STATE OUTPUTS
www.ti.com
SCES083F–AUGUST 1996–REVISED SEPTEMBER 2004
FEATURES
DBB PACKAGE
(TOP VIEW)
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Member of the Texas Instruments Widebus™
Family
4Y1
3Y1
GND
2Y1
1Y1
1Y2
2Y2
GND
3Y2
4Y2
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
1
Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
2
3
Latch-Up Performance Exceeds 250 mA Per
JESD 17
4
5
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
V
CC
V
6
CC
1Y3
2Y3
GND
3Y3
4Y3
GND
1Y4
2Y4
NC
A1
7
8
GND
NC
– 1000-V Charged-Device Model (C101)
9
10
11
12
13
14
15
DESCRIPTION/ORDERING INFORMATION
A2
GND
NC
This 1-bit to 4-bit address register/driver is designed
for 1.65-V to 3.6-V VCC operation. The device is ideal
for use in applications in which a single address bus
is driving four separate memory locations. The
SN74ALVCH16831 can be used as a buffer or a
register, depending on the logic level of the select
(SEL) input.
A3
V
CC
V
CC
3Y4
4Y4
GND
1Y5
2Y5
3Y5
4Y5
GND
1Y6
2Y6
NC 16
17
GND 18
A4
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
CLK
OE1
OE2
SEL
GND
A5
When SEL is logic high, the device is in the buffer
mode. The outputs follow the inputs and are
controlled by the two output-enable (OE) controls.
Each OE controls two groups of nine outputs.
When SEL is logic low, the device is in the register
mode. The register is an edge-triggered D-type
flip-flop. On the positive transition of the clock (CLK)
input, data set up at the A inputs is stored in the
internal registers. OE controls operate the same as in
buffer mode.
A6
V
CC
V
CC
3Y6
4Y6
GND
1Y7
2Y7
GND
3Y7
4Y7
A7
NC
GND
A8
When OE is logic low, the outputs are in a normal
logic state (high or low logic level). When OE is logic
high, the outputs are in the high-impedance state.
NC
GND
A9
SEL and OE do not affect the internal operation of
the flip-flops. Old data can be retained or new data
can be entered while the outputs are in the
high-impedance state.
NC
V
CC
V
CC
1Y8
2Y8
GND
3Y8
4Y8
4Y9
3Y9
GND
2Y9
1Y9
To ensure the high-impedance state during power up
or power down, OE should be tied to VCC through a
pullup resistor; the minimum value of the resistor is
determined by the current-sinking capability of the
driver.
Active bus-hold circuitry holds unused or undriven
inputs at a valid logic state. Use of pullup or pulldown
resistors with the bus-hold circuitry is not
recommended.
NC − No internal connection
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Widebus is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 1996–2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.