SN74ACT7881
1024 × 18
CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS227E – FEBRUARY 1993 – REVISED APRIL 1998
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
C0068 Member of the Texas Instruments
Widebus Family
C0068 Independent Asynchronous Inputs and
Outputs
C0068 Read and Write Operations Can Be
Synchronized to Independent System
Clocks
C0068 Programmable Almost-Full/Almost-Empty
Flag
C0068 Pin-to-Pin Compatible With SN74ACT7882,
SN74ACT7884, and SN74ACT7811
C0068 Input-Ready, Output-Ready, and Half-Full
Flags
C0068 Expandable in Word Width and/or Word
Depth
C0068 Fast Access Times of 11 ns With a 50-pF
Load
C0068 High Output Drive for Direct Bus Interface
C0068 Package Options Include 68-Pin Plastic
Leaded Chip Carrrier (FN) or 80-Pin Shrink
Quad Flat (PN) Package
V
CC
Q14
Q13
GND
Q12
Q11
V
CC
Q10
Q9
GND
Q8
Q7
V
CC
Q6
Q5
GND
Q4
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
D14
D13
D12
D11
D10
D9
V
CC
D8
GND
D7
D6
D5
D4
D3
D2
D1
D0
V GND
87 6 5493
D17 GND RDCLK RDEN1 RDEN2 OE RESET
HF Q0 Q1
WR
TCLK
WR
TEN1
WR
TEN2
AF/AE
GND
IR
168672665
DAF
GND
OR V
64 63 62 61
GND
Q2 Q3
Q17 Q16 GND Q15

D15 D16
CC CC
FN PACKAGE
(TOP VIEW)
V
CC
V
CC
V
CC
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
Copyright  1998, 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.
Widebus is a trademark of Texas Instruments Incorporated.
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.