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SN74LS228 Datasheet(PDF) 8 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) 8 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
10–8
APPLICATION INFORMATION
5 V
LDCK
D0
D1
D2
D3
LDCK
10 ns
IR
IRE
OE
OR
UNCK
ORE
D0
D1
D2
D3
Q0
Q1
Q2
Q3
LDCK
10 ns
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
D0
D1
D2
D3
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
LDCK
D0
D1
D2
D3
LDCK
IR
IRE
OE
OR
UNCK
ORE
D0
D1
D2
D3
Q0
Q1
Q2
Q3
LDCK
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
D0
D1
D2
D3
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
LDCK
D0
D1
D2
D3
LDCK
IR
IRE
OE
OR
UNCK
ORE
D0
D1
D2
D3
Q0
Q1
Q2
Q3
LDCK
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
D0
D1
D2
D3
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
LDCK
D0
D1
D2
D3
LDCK
IR
IRE
OE
OR
UNCK
ORE
D0
D1
D2
D3
Q0
Q1
Q2
Q3
LDCK
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
D0
D1
D2
D3
IR
IRE
OE
OR
UNCK
ORE
Q0
Q1
Q2
Q3
5 V
5 V
Open
Open
Open
Open
Open
Open
5 V
5 V
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
CLR
LDCK
IR
OE
UNCK
OR
10 ns
≡ Noninverting delay ≥ 10 ns (e.g., two stages of ’LS04), two places.
Figure 1. 48-Word by 16-Bit Expansion Using ’LS227



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