參數(shù)資料
型號: 74HCT191N,652
廠商: NXP Semiconductors
文件頁數(shù): 6/14頁
文件大小: 0K
描述: IC COUNTER UP/DOWN SYNC 16-DIP
產(chǎn)品培訓模塊: Logic Packages
標準包裝: 25
系列: 74HCT
邏輯類型: 二進制計數(shù)器
方向: 上,下
元件數(shù): 1
每個元件的位元數(shù): 4
計時: 同步
計數(shù)速率: 39MHz
觸發(fā)器類型: 正邊沿
電源電壓: 4.5 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 通孔
封裝/外殼: 16-DIP(0.300",7.62mm)
供應商設(shè)備封裝: 16-DIP
包裝: 管件
其它名稱: 74HCT191N
74HCT191N-ND
933670090652
December 1990
14
Philips Semiconductors
Product specication
Presettable synchronous 4-bit binary
up/down counter
74HC/HCT191
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”.
Fig.16 Waveforms showing the set-up and hold times from the parallel load input (PL) to the data input (Dn).
The shaded areas indicate when the input is
permitted to change for predictable output
performance.
(1) HC : VM = 50%; VI = GND to VCC.
HCT : VM = 1.3 V; VI = GND to 3 V.
Fig.17 Waveforms showing the set-up and hold times from the count enable and up/down inputs (CE, U/D) to the
clock (CP).
The shaded areas indicate when the input is
permitted to change for predictable output
performance.
(1) HC : VM = 50%; VI = GND to VCC.
HCT : VM = 1.3 V; VI = GND to 3 V.
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