Datasheet > SN74ACT7814-20DL

SN74ACT7814-20DL

更新时间： 2024-11-16 12:05:19

品牌	Logo	应用领域
德州仪器 - TI		存储
页数	文件大小	规格书
16页	525K
描述
64 x 18 STROBED FIRST-IN, FIRST-OUT MEMORY

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SN74ACT7814-20DL 数据手册

SN74ACT7814

64 × 18 STROBED FIRST-IN, FIRST-OUT MEMORY

SCAS209C – APRIL 1992 – REVISED APRIL 1998

DL PACKAGE

(TOP VIEW)

Member of the Texas Instruments

Widebus Family

Load Clock and Unload Clock Can Be

Asynchronous or Coincident

RESET

D17

D16

D15

D14

D13

D12

D11

Q17

Q16

Q15

GND

Q14

64 Words by 18 Bits

Low-Power Advanced CMOS Technology

Full, Empty, and Half-Full Flags

Programmable Almost-Full/Almost-Empty

Flag

Q13

Q12

Q11

Q10

Fast Access Times of 15 ns With a 50-pF

Load and All Data Outputs Switching

Simultaneously

D10

GND

Data Rates up to 50 MHz

3-State Outputs

GND

Pin-to-Pin Compatible With SN74ACT7804

and SN74ACT7806

D6 15

42 Q7

Packaged in Shrink Small-Outline 300-mil

Package Using 25-mil Center-to-Center

Spacing

D3 18

D2 19

38 Q4

37 Q3

D1 20

description

36 Q2

D0 21

A FIFO memory is a storage device that allows

data to be written into and read from its array at

independent data rates. The SN74ACT7814 is a

64-word by 18-bit FIFO for high speed and fast

access times. It processes data at rates up to

50 MHz and access times of 15 ns in a bit-parallel

format.

35 GND

34 Q1

HF 22

PEN 23

AF/AE 24

LDCK 25

NC 26

33 Q0

32 UNCK

31 NC

NC 27

30 NC

FULL 28

29 EMPTY

Data is written into memory on a low-to-high

transition at the load clock (LDCK) input and is

read out on a low-to-high transition at the unload

clock (UNCK) input. The memory is full when the

number of words clocked in exceeds the number

of words clocked out by 64. When the memory is

full, LDCK signals have no effect on the data

residing in memory. When the memory is empty,

UNCK signals have no effect.

Status of the FIFO memory is monitored by the full (FULL), empty (EMPTY), half-full (HF), and

almost-full/almost-empty (AF/AE) flags. The FULL output is low when the memory is full and high when the

memory is not full. The EMPTY output is low when the memory is empty and high when it is not empty. The HF

output is high when the FIFO contains 32 or more words and is low when it contains 31 or fewer words. The

AF/AE status flag is a programmable flag. The first one or two low-to-high transitions of LDCK after reset are

used to program the almost-empty offset value (X) and the almost-full offset value (Y) if program enable (PEN)

is low. The AF/AE flag is high when the FIFO contains X or fewer words or (64 – Y) or more words. The AF/AE

flag is low when the FIFO contains between (X + 1) and (63 – Y) words.

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.

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

12 3 4 5 6 7...16

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SN74ACT7814-20DL 替代型号

型号	品牌	替代类型	描述	数据表
SN74ACT7813-20DL	TI	类似代替	64 x18 CLOCKED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7813-15DL	TI	类似代替	64 x18 CLOCKED FIRST-IN, FIRST-OUT MEMORY
SN74ALVC7814-25DL	TI	类似代替	LOW-POWER FIRST-IN, FIRST-OUT MEMORY

与SN74ACT7814-20DL相关器件

型号	品牌	获取价格	描述	数据表
SN74ACT7814-20DLR	TI	获取价格	64 x 18 STROBED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7814-25DL	TI	获取价格	64 x 18 STROBED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7814-40DL	TI	获取价格	64 x 18 STROBED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7814-40DLR	TI	获取价格	64 x 18 STROBED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7814DL	TI	获取价格	64 】 18 STROBED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7881	TI	获取价格	1024 】 18 CLOCKED FIRST-IN, FIRST-OUT MEMORY
SN74ACT7881-15FN	TI	获取价格	1024 x 18 synchronous FIFO memory 68-PLCC 0 to 70
SN74ACT7881-15FNR	TI	获取价格	1KX18 OTHER FIFO, 12ns, PQCC68, GREEN, PLASTIC, LCC-68
SN74ACT7881-15PNR	TI	获取价格	1KX18 OTHER FIFO, 12ns, PQFP80, GREEN, PLASTIC, LQFP-80
SN74ACT7881-20FN	TI	获取价格	1024 x 18 synchronous FIFO memory 68-PLCC 0 to 70

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