Datasheet > 74HCT7403D,112

74HCT7403D,112

更新时间： 2024-02-04 18:41:03

品牌	Logo	应用领域
恩智浦 - NXP		先进先出芯片
页数	文件大小	规格书
28页	118K
描述
74HC(T)7403 - 4-Bit x 64-word FIFO register; 3-state SOP 16-Pin

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74HCT7403D,112 技术参数

Philips Semiconductors

Product speciﬁcation

4-Bit x 64-word FIFO register; 3-state

74HC/HCT7403

Sequence 2 (FIFO_Bruns full)

After the MR pulse, a series of 64 SI pulses are applied. When 64 words are shifted in, DIR_Bremains LOW due to FIFO_B

being full (5). DOR_Agoes LOW due to FIFO_Abeing empty.

Sequence 3 (FIFO_Aruns full)

When 65 words are shifted in, DOR_Aremains HIGH due to valid data remaining at the output of FIFO_A. Q_nAremains

HIGH, being the polarity of the 65th data word (6). After the 128th SI pulse, DIR remains LOW and both FIFOs are full

(7). Additional pulses have no effect.

Sequence 4 (both FIFOs full, starting SHIFT-OUT process)

SI_Ais held HIGH and two SO_Bpulses are applied (8). These pulses shift out two words and thus allow two empty

locations to bubble-up to the input stage of FIFO_B, and proceed to FIFO_A(9). When the first empty location arrives at the

input of FIFO_A, a DIR_Apulse is generated (10) and a new word is shifted into FIFO_A. SI_Ais made LOW and now the

second empty location reaches the input stage of FIFO_A, after which DIR_Aremains HIGH (11).

Sequence 5 (FIFO_Aruns empty)

At the start of sequence 5 FIFO_Acontains 63 valid words due to two words being shifted out and one word being shifted

in, in sequence 4. An additional series of SO_Bpulses are applied. After 63 SO_Bpulses, all words from FIFO_Aare shifted

into FIFO_B. DOR_Aremains LOW (12).

Sequence 6 (FIFO_Bruns empty)

After the next SO_Bpulse, DIR_Bremains HIGH due to the input stage of FIFO_Bbeing empty. After another 63 SO_Bpulses,

DOR_Bremains LOW due to both FIFOs being empty (14). Additional SO_Bpulses have no effect. The last word remains

available at the output Q_n.

PACKAGE OUTLINES

See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.

September 1993

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型号	品牌	描述	获取价格	数据表
74HCT7403D,518	NXP	74HC(T)7403 - 4-Bit x 64-word FIFO register; 3-state SOP 16-Pin	获取价格
74HCT7403DB-T	NXP	IC 64 X 4 OTHER FIFO, PDSO16, FIFO	获取价格
74HCT7403D-Q100,51	NXP	74HC(T)7403-Q100 - 4-bit x 64-word FIFO register; 3-state SOP 16-Pin	获取价格
74HCT7403D-T	ETC	x4 Asynchronous FIFO	获取价格
74HCT7403N	NXP	4-Bit x 64-word FIFO register; 3-state	获取价格
74HCT7403N	PHILIPS	FIFO, 64X4, 108ns, Asynchronous, CMOS, PDIP16,	获取价格