參數(shù)資料
型號: 74HCT4543
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: 4-Bit Synchronous Up/Down Binary Counters 16-PDIP -40 to 85
中文描述: BCD碼至7段鎖存器/解碼器/驅動器的液晶顯示器
文件頁數(shù): 11/11頁
文件大?。?/td> 78K
代理商: 74HCT4543
December 1990
11
Philips Semiconductors
Product specification
BCD to 7-segment latch/decoder/driver for
LCDs
74HC/HCT4543
AC WAVEFORMS
Fig.12 Waveforms showing the address input (D
n
)
to output (Q
n
) propagation delays and the
output transition times.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.13 Waveforms showing the latch disable input
(LD) to output (Q
n
) propagation delays and
the output transition times.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
Fig.14 Waveforms showing the blanking (BI) to
output (Q
n
) propagation delays and the
output transition times.
(1) HC : V
M
= 50%; V
I
= GND to V
.
HCT: V
M
= 1.3 V; V
I
= GND to 3 V.
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
.
Fig.15 Waveforms showing the address (D
n
) to
latch disable (LD) input set-up and hold
times.
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.
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