SN74ACT7811

1024

× 18

CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS151C – JANUARY 1991 – REVISED FEBRUARY 1996

2

POST OFFICE BOX 655303

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21 22 23 24 25

60

59

58

57

56

55

54

53

52

51

50

48

49

47

46

45

44

43

42

41

40

26 27 28 29 30 31 32 33 34 35 36 37 38 39

80 79 78 77 76 75 74 73

71 70 69 68 67 66 65 64 63 62 61

72

NC

GND

GND

NC

NC

NC

VCC

NC

GND

Q16

Q17

OR

GND

VCC

OE

RDEN2

RDEN1

RDCLK

D16

D15

GND

D17

RESET

VCC

VCC

GND

VCC

GND

GND

VCC

WRTCLK

WRTEN1

WRTEN2

AF/AE

IR

HF

Q1

Q0

Q2

Q3

PN PACKAGE

(TOP VIEW)

NC – No internal connection

description

A FIFO memory is a storage device that allows data to be written into and read from its array at independent

data rates. The SN74ACT7811 is a 1024

× 18-bit FIFO for high speed and fast access times. It processes data

at rates up to 40 MHz and access times of 15 ns in a bit-parallel format. Data outputs are noninverting with

respect to the data inputs. Expansion is easily accomplished in both word width and word depth.

The SN74ACT7811 has normal input-bus-to-output-bus asynchronous operation. The special enable circuitry

adds the ability to synchronize independent read and write (interrupts or requests) to their respective system

clock.

The SN74ACT7811 is characterized for operation from 0

°C to 70°C.