參數(shù)資料
型號： 74HC7540
廠商： NXP Semiconductors N.V.
英文描述： Octal Schmitt trigger buffer/line driver; 3-state; inverting
中文描述： 八路施密特觸發(fā)緩沖器/線路驅(qū)動(dòng)器，3態(tài);反相
文件頁數(shù)： 2/7頁
文件大小： 55K
代理商： 74HC7540
December 1990
2
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver;
3-state; inverting
74HC/HCT7540
FEATURES
Inverting outputs
Schmitt trigger action on all data inputs
Output capability: bus driver
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT7540 are high-speed Si-gate CMOS
devices and are pin compatible with low power Schottky
TTL (LSTTL). They are specified in compliance with
JEDEC standard no. 7A.
The 74HC/HCT7540 are octal Schmitt trigger inverting
buffer/line drivers with 3-state outputs. The 3-state outputs
are controlled by the output enable inputs OE
1
and OE
2
.
A HIGH on OE
n
causes the outputs to assume a high
impedance OFF-state.
The Schmitt trigger action in the data inputs transforms
slowly changing input signals into sharply defined
jitter-free output signals.
The “7540” is identical to the “540” but has hysteresis on
the data inputs.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
×
V
CC2
×
f
i
+ ∑
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V
2.
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PHL
/ t
PLH
C
I
C
PD
propagation delay A
n
to Y
n
input capacitance
power dissipation capacitance per buffer
C
L
= 15 pF; V
CC
= 5 V
11
3.5
29
16
3.5
31
ns
pF
pF
notes 1 and 2
相關(guān)PDF資料
PDF描述
74HCT7540 Dual 4-Input Positive-AND Gates 14-SOIC -40 to 85
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74HCT7541 Dual 4-Input Positive-AND Gates 14-SOIC -40 to 85
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74HCT7597 Dual 4-Input Positive-AND Gates 14-SOIC -40 to 85
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74HC7540D 功能描述:緩沖器和線路驅(qū)動(dòng)器 OCT SCHMITT TRIG 3ST RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
74HC7540D,112 功能描述:緩沖器和線路驅(qū)動(dòng)器 OCT SCHMITT TRIG 3ST RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
74HC7540D,118 功能描述:緩沖器和線路驅(qū)動(dòng)器 OCTAL SCHMITT TRIGGER BUF/DRVR RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
74HC7540DB 功能描述:緩沖器和線路驅(qū)動(dòng)器 OCT SCHMITT TRIG 3ST RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
74HC7540DB,112 功能描述:緩沖器和線路驅(qū)動(dòng)器 OCT SCHMITT TRIG 3ST RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel
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