74HC7541PW-T [NXP]
IC HC/UH SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20, 4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20, Bus Driver/Transceiver;
| 型号： | 74HC7541PW-T |
| 厂家： | 
NXP |
| 描述： | IC HC/UH SERIES, 8-BIT DRIVER, TRUE OUTPUT, PDSO20, 4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20, Bus Driver/Transceiver 驱动器 触发器 |
| 文件： | 总7页 (文件大小：59K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
INTEGRATED CIRCUITS
DATA SHEET
For a complete data sheet, please also download:
• The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
• The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT7541
Octal Schmitt trigger buffer/line
driver; 3-state
December 1990
Product specification
Supersedes data of March 1988
File under Integrated Circuits, IC06
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
The 74HC/HCT7541 are octal Schmitt trigger
FEATURES
non-inverting buffer/line drivers with 3-state outputs. The
3-state outputs are controlled by the output enable inputs
OE1 and OE2.
• Non-inverting outputs
• Schmitt trigger action on all data inputs
• Output capability: bus driver
• ICC category: MSI
A HIGH on OEn 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.
GENERAL DESCRIPTION
The 74HC/HCT7541 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 “7541” is identical to the “541” but has hysteresis on
the data inputs.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
TYPICAL
SYMBOL
PARAMETER
CONDITIONS
UNIT
HC
HCT
tPHL/ tPLH
CI
propagation delay An to Yn
input capacitance
CL = 15 pF; VCC = 5 V
10
3.5
30
16
3.5
32
ns
pF
pF
CPD
power dissipation capacitance per buffer
notes 1 and 2
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
∑ (CL × VCC2 × fo) = sum of outputs
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC − 1.5 V
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information”.
December 1990
2
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
PIN DESCRIPTION
PIN NO.
SYMBOL
NAME AND FUNCTION
1, 19
OE1, OE2
A0 to A7
GND
output enable inputs (active LOW)
data inputs
2, 3, 4, 5, 6, 7, 8, 9
10
ground (0 V)
18, 17, 16, 15, 14, 13, 12, 11
20
Y0 to Y7
VCC
bus outputs
positive supply voltage
Fig.2 Logic symbol.
Fig.3 IEC logic symbol.
Fig.1 Pin configuration.
December 1990
3
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
FUNCTION TABLE
INPUTS
OE2
OUTPUTS
Yn
OE1
An
L
L
X
H
L
L
H
X
L
H
X
X
L
H
Z
Z
Notes
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
Fig.4 Functional diagram.
Fig.5 Logic diagram.
December 1990
4
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Transfer characteristics are given below (not applicable for OEn inputs).
Output capability: bus driver
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
T
amb (°C)
TEST CONDITIONS
74HC
SYMBOL PARAMETER
UNIT
VCC
(V)
+25
−40 to +85 −40 to +125
WAVEFORMS
min. typ. max. min. max. min. max.
tPHL/ tPLH propagation delay
An to Yn
39
14
11
120
24
20
150
30
26
180
36
32
ns
ns
ns
ns
2.0 Fig.8
4.5
6.0
t
t
t
PZH/ tPZL 3-state output enable time
OEn to Yn
44
16
13
160
32
27
200
40
34
240
48
41
2.0 Fig.8
4.5
6.0
PHZ/ tPLZ 3-state output disable time
OEn to Yn
58
21
17
160
32
27
200
40
34
240
48
41
2.0 Fig.8
4.5
6.0
THL/ tTLH output transition time
14
5
4
60
12
10
75
15
13
90
18
15
2.0 Fig.8
4.5
6.0
TRANSFER CHARACTERISTICS FOR 74HC
Voltages are referred to GND (ground = 0 V)
Tamb (°C)
TEST CONDITIONS
74HC
SYMBOL PARAMETER
UNIT
VCC
(V)
+25
−40 to +85 −40 to +125
WAVEFORMS
min. typ. max. min. max. min. max.
VT+
VT−
VH
positive-going threshold
1.50
3.15
4.20
1.50
3.15
4.20
1.50
3.15
4.20
V
V
V
2.0 Figs 6 and 7
4.5
6.0
negative-going threshold 0.30
0.30
1.35
1.80
0.30
1.35
1.80
2.0 Figs 6 and 7
4.5
6.0
1.35
1.80
hysteresis (VT+ − VT−)
0.10 0.20
0.25 0.40
0.30 0.50
0.10
0.25
0.30
0.10
0.25
0.30
2.0 Figs 6 and 7
4.5
6.0
December 1990
5
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Transfer characteristics are given below (not applicable for OEn inputs).
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.
To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
INPUT
UNIT LOAD COEFFICIENT
OE1
OE2
An
1.30
1.30
0.20
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
Tamb (°C)
TEST CONDITIONS
74HCT
SYMBOL PARAMETER
UNIT
VCC
+25
−40 to +85 −40 to +125
WAVEFORMS
(V)
min typ. max min. max min. max.
t
t
t
PHL/ tPLH propagation delay
An to Yn
19 32
18 32
20 32
40
40
40
15
48
48
48
18
ns
ns
ns
ns
4.5 Fig.8
4.5 Fig.8
4.5 Fig.8
4.5 Fig.8
PZH/ tPZL 3-state output enable time
OEn to Yn
PHZ/ tPLZ 3-state output disable time
OEn to Yn
tTHL/ tTLH output transition time
5
12
TRANSFER CHARACTERISTICS FOR 74HCT
Voltages are referred to GND (ground = 0 V)
Tamb (°C)
74HCT
−40 to +85 −40 to +125
min. typ. max. min. max. min. max.
TEST CONDITIONS
SYMBOL PARAMETER
UNIT
VCC
+25
WAVEFORMS
(V)
VT+
VT−
VH
positive-going threshold
2.0
2.1
2.0
2.1
2.0
2.1
V
V
V
4.5 Figs 6 and 7
5.5
negative-going threshold 0.70
0.80
0.64
0.74
0.60
0.70
4.5 Figs 6 and 7
5.5
hysteresis (VT+ − VT−)
0.17 0.23
0.17 0.23
4.5 Figs 6 and 7
5.5
December 1990
6
Philips Semiconductors
Product specification
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
TRANSFER CHARACTERISTIC WAVEFORMS
MBA325
handbook, halfpage
V
O
V
V
I
H
V
V
T
T
Fig.7 Waveforms showing the definition of VT+,
VT− and VH.
Fig.6 Transfer characteristic.
AC WAVEFORMS
(1) HC : VM = 50%; VI = GND to VCC
.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.8 Waveforms showing the input (An) to output (Yn) propagation delays and the output transition times.
(1) HC : VM = 50%; VI = GND to VCC
.
HCT: VM = 1.3 V; VI = GND to 3 V.
Fig.9 Waveforms showing the 3-state enable and disable times.
PACKAGE OUTLINES
See “74HC/HCT/HCU/HCMOS Logic Package Outlines”.
December 1990
7
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