SN74ACT7811
1024 × 18
CLOCKED FIRST-IN, FIRST-OUT MEMORY
SCAS151C – JANUARY 1991 – REVISED FEBRUARY 1996
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Member of the Texas Instruments
Widebus ™ Family
Independent Asynchronous Inputs and
Outputs
1024 Words × 18 Bits
Read and Write Operations Can Be
Synchronized to Independent System
Clocks
Programmable Almost-Full/Almost-Empty
Flag
Pin-to-Pin Compatible With SN74ACT7881,
SN74ACT7882, and SN74ACT7884
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Input-Ready, Output-Ready, and Half-Full
Flags
Cascadable in Word Width and/or Word
Depth
Fast Access Times of 15 ns With a 50-pF
Load
High-Output Drive for Direct Bus Interface
Available in 68-Pin PLCC (FN) and
Space-Saving 80-Pin Thin Quad Flat (PN)
Packages
D15
D16
D17
GND
RDCLK
RDEN1
RDEN2
OE
RESET
V CC
GND
OR
VCC
Q17
Q16
GND
Q15
FN PACKAGE
(TOP VIEW)
9
10
8 7
6
5 4 3 2 1 68 67 66 65 64 63 62 61
60
11
59
12
58
13
57
14
56
15
55
16
54
17
53
18
52
19
51
20
50
21
49
22
48
23
47
24
46
25
45
44
26
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
VCC
Q14
Q13
GND
Q12
Q11
VCC
Q10
Q9
GND
Q8
Q7
VCC
Q6
Q5
GND
Q4
DAF
GND
WRTCLK
WRTEN1
WRTEN2
VCC
AF/AE
GND
IR
HF
VCC
Q0
Q1
GND
Q2
Q3
V
CC
D14
D13
D12
D11
D10
D9
VCC
D8
GND
D7
D6
D5
D4
D3
D2
D1
D0
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 Incorporated.
Copyright © 1996, Texas Instruments Incorporated
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
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