參數(shù)資料
型號(hào): 74HCT190
廠商: NXP Semiconductors N.V.
元件分類(lèi): 通用總線(xiàn)功能
英文描述: Presettable synchronous BCD decade up/down counter
中文描述: 可預(yù)置同步BCD碼十年向上/向下計(jì)數(shù)器
文件頁(yè)數(shù): 13/13頁(yè)
文件大?。?/td> 101K
代理商: 74HCT190
December 1990
13
Philips Semiconductors
Product specification
Presettable synchronous BCD decade
up/down counter
74HC/HCT190
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 (D
n
).
The shaded areas indicate when the input is
permitted to change for predictable output
performance.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= 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 : V
M
= 50%; V
I
= GND to V
.
HCT : V
M
= 1.3 V; V
I
= GND to 3 V.
相關(guān)PDF資料
PDF描述
74HC190 Presettable synchronous BCD decade up/down counter
74HC190D Presettable synchronous BCD decade up/down counter
74HC190DB Presettable synchronous BCD decade up/down counter
74HC190N Presettable synchronous BCD decade up/down counter
74HC190PW Presettable synchronous BCD decade up/down counter
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