Page 1
DATA SH EET
Product specification
File under Integrated Circuits, IC06
September 1993
INTEGRATED CIRCUITS
74HC/HCT241
Octal buffer/line driver; 3-state
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
Page 2
September 1993 2
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
FEATURES
• Output capability: bus driver
• ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT241 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/HCT241 are octal non-inverting buffer/line
drivers with 3-state outputs. The 3-state outputs are
controlled by the output enable inputs 1OE and 2OE.
QUICK REFERENCE DATA
GND = 0 V; T
amb
=25°C; tr=tf= 6 ns
Notes
1. C
PD
is used to determine the dynamic power dissipation (PD in µW):
PD=CPD× V
CC
2
× fi+∑(CL× V
CC
2
× fo) where:
fi= input frequency in MHz
fo= output frequency in MHz
∑ (CL× V
CC
2
× fo) = sum of outputs
CL= output load capacitance in pF
VCC= supply voltage in V
2. For HC the condition is VI= GND to V
CC
For HCT the condition is VI= GND to VCC− 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL PARAMETER CONDITIONS
TYPICAL
UNIT
HC HCT
t
PHL
/ t
PLH
propagation delay
1An to 1Yn;
2An to 2Y
n
CL= 15 pF; VCC= 5 V 7 11 ns
C
I
input capacitance 3.5 3.5 pF
C
PD
power dissipation capacitance per buffer notes 1 and 2 30 30 pF
Page 3
September 1993 3
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
11
OE output enable input (active LOW)
2, 4, 6, 8 1A
0
to 1A
3
data inputs
3, 5, 7, 9 2Y
0
to 2Y
3
bus outputs
10 GND ground (0 V)
17, 15, 13, 11 2A
0
to 2A
3
data inputs
18, 16, 14, 12 1Y
0
to 1Y
3
bus outputs
19 20E output enable input (active HIGH)
20 V
CC
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol. Fig.3 IEC logic symbol
Page 4
September 1993 4
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
FUNCTION TABLES
Note
1. H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
INPUTS OUTPUT
1
OE 1A
n
1Y
n
L
L
H
L
H
X
L
H
Z
INPUTS OUTPUT
20E 2A
n
2Y
n
H
H
L
L
H
X
L
H
Z
Fig.4 Functional diagram.
Page 5
September 1993 5
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; t
r=tf
= 6 ns; CL= 50 pF
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HC
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min.
typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
1An to 1Yn;
2An to 2Y
n
25
9
7
100
20
17
125
25
21
150
30
26
ns 2.0
4.5
6.0
Fig.5
t
PZH
/ t
PZL
3-state output enable time
1OE to 1Yn;
2OE to 2Y
n
30
11
9
150
30
26
190
38
33
225
45
38
ns 2.0
4.5
6.0
Fig.6
t
PHZ
/ t
PLZ
3-state output disable time
1OE to 1Yn;
2OE to 2Y
n
39
14
11
150
30
26
190
38
33
225
45
38
ns 2.0
4.5
6.0
Fig.6
t
THL
/ t
TLH
output transition time 14
5
4
60
12
10
75
15
13
90
18
15
ns 2.0
4.5
6.0
Fig.5
Page 6
September 1993 6
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”
.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (∆I
CC
) 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.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr=tf= 6 ns; CL= 50 pF
INPUT UNIT LOAD COEFFICIENT
1A
n
2A
n
1OE
2OE
0.70
0.70
0.70
1.50
SYMBOL PARAMETER
T
amb
(°C)
UNIT
TEST CONDITIONS
74HCT
V
CC
(V)
WAVEFORMS
+25 −40 to +85 −40 to +125
min. typ. max. min. max. min. max.
t
PHL
/ t
PLH
propagation delay
1An to 1Yn;
2An to 2Y
n
13 22 28 33 ns 4.5 Fig.5
t
PZH
/ t
PZL
3-state output enable time
1OE to 1Yn;
2OE to 2Y
n
15 30 38 45 ns 4.5 Fig.6
t
PHZ
/ t
PLZ
3-state output disable time
1OE to 1Yn;
2OE to 2Y
n
18 30 38 45 ns 4.5 Fig.6
t
THL
/ t
TLH
output transition time 5 12 15 18 ns 4.5 Fig.5
Page 7
September 1993 7
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
AC WAVEFORMS
Fig.5 Waveforms showing the input (1An, 2An) to output (1Yn, 2Yn) propagation delays and the output transition
times.
(1) HC : VM= 50%; VI= GND to VCC.
HCT: V
M
= 1.3 V; VI= GND to 3 V.
Fig.6 Waveform showing the 3-state enable and disable times for input 1OE.
(1) HC : VM= 50%; VI= GND to VCC.
HCT: V
M
= 1.3 V; VI= GND to 3 V.
Fig.7 Waveform showing the 3-state enable and disable times for input 2OE.
(1) HC : VM= 50%; VI= GND to VCC.
HCT: V
M
= 1.3 V; VI= GND to 3 V.
Page 8
September 1993 8
Philips Semiconductors Product specification
Octal buffer/line driver; 3-state 74HC/HCT241
PACKAGE OUTLINES
See
“74HC/HCT/HCU/HCMOS Logic Package Outlines”
.
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