SN74AS1805_09 Datasheet, PDF (1/6 Pages) Texas Instruments – HEX 2-INPUT NOR DRIVER

SN74AS1805
HEX 2ĆINPUT NOR DRIVER
ą
SDAS043C − AUGUST 1984 − REVISED JANUARY 1995
• High Capacitive-Drive Capability
• Typical Delay Time of 2.6 ns (C_L = 50 pF)
and Typical Power Dissipation of Less
Than 12 mW Per Gate
• Center V_CC and GND Configuration
Provides Minimum Lead Inductance in
High-Current Switching Applications
• Package Options Include Plastic
Small-Outline (DW) Packages and Standard
Plastic (N) 300-mil DIPs
description
DW OR N PACKAGE
(TOP VIEW)
5B ₁
6Y ₂
6A 3
6B 4
V_CC 5
1A 6
1B 7
1Y 8
2A 9
2B 10
20 ^5A
19 ^5Y
18 4B
17 4A
16 4Y
15 GND
14 3Y
13 3B
12 3A
11 2Y
This device contains six independent 2-input NOR
drivers. It performs the Boolean functions
Y = A + B or Y = A • B in positive logic.
The center-pin configuration reduces lead inductance when compared to the ′AS805B. This reduced lead
inductance minimizes noise generated onto either the V_CC or GND bus. This reduction is significant in
high-current switching applications.
The SN74AS1805 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
(each driver)
INPUTS
A
B
OUTPUT
Y
H
X
L
X
H
L
L
L
H
logic symbol^†
6
1A
≥1
7
1B
9
2A
10
2B
12
3A
13
3B
17
4A
18
4B
20
5A
1
5B
3
6A
4
6B
8
1Y
11
2Y
14
3Y
16
4Y
19
5Y
2
6Y
† _{This symbol is in accordance with ANSI/IEEE Std 91-1984 and}
IEC Publication 617-12.
logic diagram (positive logic)
6
1A
7
1B
9
2A
10
2B
12
3A
13
3B
17
4A
18
4B
20
5A
1
5B
3
6A
4
6B
8
1Y
11
2Y
14
3Y
16
4Y
19
5Y
2
6Y
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  1995, Texas Instruments Incorporated
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