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SN74LS228 Datasheet(PDF) 3 Page - Texas Instruments

Part # SN74LS228
Description  16 x 4 SYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY WITH OPEN-COLLECTOR OUTPUTS
PDF  10 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN74LS228 Datasheet(HTML) 3 Page - Texas Instruments

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SN74LS228
16
× 4 SYNCHRONOUS FIRST-IN, FIRST-OUT MEMORY
WITH OPEN-COLLECTOR OUTPUTS
SDLS024 – JANUARY 1991 – REVISED SEPTEMBER 1993
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
10–3
logic diagram (positive logic)
1
9
3
15
4
5
6
7
2
14
13
12
11
10
OE
CLR
LDCK
UNCK
D0
D1
D2
D3
IR
OR
Q0
Q1
Q2
Q3
16
16
16
16
Ring
Counter
CTR
DIV 16
Write
Address
Ring
Counter
CTR
DIV 16
Read
Address
COMP
RAM
16
× 4
+
CT = 1
+
CT = 1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P
Q
1A
2A
C5
1
16
EN
≥1
1A,5D 2A
1
16
S
1D
C1
S
2D
C2
R
3D
C3
R
4D
C4
Q=P+1
P=Q+1
P=Q
EMPTY



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