參數(shù)資料
型號: SN74ACT7806-25DLR
廠商: TEXAS INSTRUMENTS INC
元件分類: FIFO
英文描述: 256 X 18 OTHER FIFO, 18 ns, PDSO56
封裝: 0.300 INCH, 0.635 MM PITCH, GREEN, PLASTIC, SSOP-56
文件頁數(shù): 7/12頁
文件大小: 187K
代理商: SN74ACT7806-25DLR
SN74ACT7806
256
× 18
STROBED FIRST-IN, FIRST-OUT MEMORY
SCAS438C – APRIL 1992 – REVISED APRIL 1998
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
offset values for AF/AE
The AF/AE flag has two programmable limits, the almost-empty offset value (X) and the almost-full offset
value (Y). They can be programmed after the FIFO is reset and before the first word is written to memory. The
AF/AE flag is high when the FIFO contains X or fewer words or (256 – Y) or more words.
To program the offset values, PEN can be brought low after reset only when LDCK is low. On the following
low-to-high transition of LDCK, the binary value on D0–D6 is stored as the almost-empty offset value (X) and
the almost-full offset value (Y). Holding PEN low for another low-to-high transition of LDCK reprograms Y to the
binary value on D0–D6 at the time of the second LDCK low-to-high transition. Writes to the FIFO memory are
disabled while the offsets are programmed. A maximum value of 127 can be programmed for either X or Y (see
Figure 1). To use the default values of X = Y = 32, PEN must be held high.
RESET
X and Y
Y
PEN
D0–D6
EMPTY
Don’t Care
LDCK
Don’t Care
Figure 1. Programming X and Y Separately
相關(guān)PDF資料
PDF描述
SN74ALS35N-10 ALS SERIES, HEX 1-INPUT NON-INVERT GATE, PDIP14
SN74ALVC16272DGGR ALVC/VCX/A SERIES, 12-BIT EXCHANGER, TRUE OUTPUT, PDSO56
SN74ALVC16272DLR ALVC/VCX/A SERIES, 12-BIT EXCHANGER, TRUE OUTPUT, PDSO56
SN74ALVTH16374 2.5-V/3.3-V 16-Bit Edge-Triggered D-Type Flip-Flops With 3-State Outputs
SN74ALVTH16374DGG 2.5-V/3.3-V 16-BIT EDGE-TRIGGERED D-TYPE FLIP-FLOPS WITH 3-STATE OUTPUTS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SN74ACT7806-40DL 功能描述:先進(jìn)先出 256 x 18 asynch 先進(jìn)先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝:
SN74ACT7806-40DLR 功能描述:先進(jìn)先出 256 x 18 asynch 先進(jìn)先出 Memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝:
SN74ACT7807-15FN 功能描述:先進(jìn)先出 2048 x 9 synchronous 先進(jìn)先出 memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝:
SN74ACT7807-15PAG 功能描述:先進(jìn)先出 2048 x 9 synchronous 先進(jìn)先出 memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝:
SN74ACT7807-20FN 功能描述:先進(jìn)先出 2048 x 9 synchronous 先進(jìn)先出 memory RoHS:否 制造商:IDT 電路數(shù)量: 數(shù)據(jù)總線寬度:18 bit 總線定向:Unidirectional 存儲(chǔ)容量:4 Mbit 定時(shí)類型:Synchronous 組織:256 K x 18 最大時(shí)鐘頻率:100 MHz 訪問時(shí)間:10 ns 電源電壓-最大:3.6 V 電源電壓-最小:6 V 最大工作電流:35 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-80 封裝: