6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
|
MIN |
MAX |
UNIT |
Supply voltage, VCC(2) |
|
7 |
V |
Input voltage, VI |
SNx4LS24x |
|
7 |
V |
SNx4S24x |
|
5.5 |
Off-state output voltage |
|
5.5 |
V |
Storage temperature, Tstg |
–65 |
150 |
°C |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Voltage values are with respect to network ground terminal.
6.2 ESD Ratings
|
VALUE |
UNIT |
ALL PACKAGES |
V(ESD) |
Electrostatic discharge |
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) |
500 |
V |
N PACKAGE |
V(ESD) |
Electrostatic discharge |
Charged device model (CDM), per JEDEC specification JESD22-C101(2) |
500 |
V |
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
6.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
|
MIN |
NOM |
MAX |
UNIT |
VCC |
Supply voltage(1) |
SN54xS24x |
4.5 |
5 |
5.5 |
V |
SN74xS24x |
4.75 |
5 |
5.25 |
VIH |
High-level input voltage |
2 |
|
|
V |
VIL |
Low-level input voltage |
SN54LS24x |
|
|
0.7 |
V |
SN54S24x, SN74xS24x |
|
|
0.8 |
IOH |
High-level output current |
SN54xS24x |
|
|
–12 |
mA |
SN74xS24x |
|
|
–15 |
IOL |
Low-level output current |
SN54LS24x |
|
|
12 |
mA |
SN54S24x |
|
|
48 |
SN74LS24x |
|
|
24 |
SN74S24x |
|
|
64 |
|
External resistance between any input and VCC or ground (SNx4S24x only) |
|
|
40 |
kΩ |
TA |
Operating free-air temperature(2) |
SN54xS24x |
–55 |
|
125 |
°C |
SN74xS24x |
0 |
|
70 |
(1) Voltage values are with respect to network ground terminal.
(2) An SN54S241J operating at free-air temperature above 116°C requires a heat sink that provides a thermal resistance from case to free air, RθCA, of not more that 40°C/W.
6.4 Thermal Information
THERMAL METRIC(1) |
SN74LS240, SN74LS244 |
SN74LS24x, SN74S24x |
SN74LS24x |
UNIT |
DB (SSOP) |
DW (SOIC) |
N (PDIP) |
NS (SOP) |
20 PINS |
20 PINS |
20 PINS |
20 PINS |
RθJA |
Junction-to-ambient thermal resistance(2)(3) |
94.3 |
90.3 |
50.6 |
76.6 |
°C/W |
RθJC(top) |
Junction-to-case (top) thermal resistance |
55.9 |
45.5 |
37.4 |
42.9 |
°C/W |
RθJB |
Junction-to-board thermal resistance |
49.5 |
48.1 |
31.5 |
44.1 |
°C/W |
ψJT |
Junction-to-top characterization parameter |
21.3 |
19.4 |
24 |
19.2 |
°C/W |
ψJB |
Junction-to-board characterization parameter |
49.1 |
47.6 |
31.4 |
43.7 |
°C/W |
(2) Voltage values are with respect to network ground terminal.
(3) The package thermal impedance is calculated in accordance with JESD 51-7.
6.5 Electrical Characteristics – SNx4LS24x
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER |
TEST CONDITIONS(1) |
MIN |
TYP(2) |
MAX |
UNIT |
VIK |
VCC = MIN, II = –18 mA |
|
|
–1.5 |
V |
Hysteresis (VT+ − VT−) |
VCC = MIN |
0.2 |
0.4 |
|
V |
VOH |
VCC = MIN, IOH = –3 mA, VIH = 2 V, VIL = MAX |
2.4 |
3.4 |
|
V |
VCC = MIN, IOH = MAX, VIH = 2 V, VIL = 0.5 V |
2 |
|
|
VOL |
VCC = MIN, VIL = MAX, VIH = 2 V |
IOL = 12 mA, SN54LS24x |
|
|
0.4 |
V |
IOL = 24 mA, SN74LS24x |
|
|
0.5 |
IOZH |
VCC = MAX, VIL = MAX, VIH = 2 V, VO = 2.7 V |
|
|
20 |
µA |
IOZL |
VCC = MAX, VIL = MAX, VIH = 2 V, VO = 0.4 V |
|
|
–20 |
µA |
II |
VCC = MAX, VI = 7 V |
|
|
0.1 |
mA |
IIH |
VCC = MAX, VI = 2.7 V |
|
|
20 |
µA |
IIL |
VCC = MAX, VIL = 0.4 V |
|
|
–0.2 |
mA |
IOS(3) |
VCC = MAX |
–40 |
|
–225 |
mA |
ICC |
VCC = MAX, output open |
Outputs high |
All |
|
17 |
27 |
mA |
Outputs low |
SNx4LS240 |
|
26 |
44 |
SNx4LS241, SNx4LS244 |
|
27 |
46 |
Outputs disabled |
SNx4LS240 |
|
29 |
50 |
SNx4LS241, SNx4LS244 |
|
32 |
54 |
(1) For conditions shown as minimum or maximum, use the appropriate value specified under recommended operating conditions.
(2) All typical values are at VCC = 5 V and TA = 25°C.
(3) Not more than one output must be shorted at a time, and duration of the short-circuit must not exceed one second.
6.6 Electrical Characteristics – SNx4S24x
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER |
TEST CONDITIONS(1) |
MIN |
TYP(2) |
MAX |
UNIT |
VIK |
VCC = MIN, II = –18 mA |
|
|
–1.2 |
V |
Hysteresis (VT+ − VT−) |
VCC = MIN |
0.2 |
0.4 |
|
V |
VOH |
VCC = MIN, IOH = –1 mA, VIH = 2 V, VIL = 0.8 V, SN74S24x only |
2.7 |
|
|
V |
VCC = MIN, IOH = –3 mA, VIH = 2 V, VIL = 0.8 V |
2.4 |
3.4 |
|
VCC = MIN, IOH = MAX, VIH = 2 V, VIL = 0.5 V |
2 |
|
|
VOL |
VCC = MIN, VIL = MAX, VIH = 2 V, IOL = 0.8 V |
|
|
0.55 |
V |
IOZH |
VCC = MAX, VIL = 0.8 V, VIH = 2 V, VO = 2.4 V |
|
|
50 |
µA |
IOZL |
VCC = MAX, VIL = MAX, VIH = 2 V, VO = 0.5 V |
|
|
–50 |
µA |
II |
VCC = MAX, VI = 5.5 V |
|
|
1 |
mA |
IIH |
VCC = MAX, VI = 2.7 V |
|
|
50 |
µA |
IIL |
VCC = MAX, VIL = 0.5 V |
Any A |
|
|
–400 |
µA |
Any G |
|
|
–2 |
mA |
IOS(3) |
VCC = MAX |
–50 |
|
–225 |
mA |
ICC |
VCC = MAX, output open |
Outputs high |
SN54S240 |
|
80 |
123 |
mA |
SN74S240 |
|
80 |
135 |
SN54S241, SN54S244 |
|
95 |
147 |
SN74S241, SN74S244 |
|
95 |
160 |
Outputs low |
SN54S240 |
|
100 |
145 |
SN74S240 |
|
100 |
150 |
SN54S241, SN54S244 |
|
120 |
170 |
SN74S241, SN74S244 |
|
120 |
180 |
Outputs disabled |
SN54S240 |
|
100 |
145 |
SN74S240 |
|
100 |
150 |
SN54S241, SN54S244 |
|
120 |
170 |
SN74S241, SN74S244 |
|
120 |
180 |
(1) For conditions shown as minimum or maximum, use the appropriate value specified under recommended operating conditions.
(2) All typical values are at VCC = 5 V, TA = 25°C.
(3) Not more than one output must be shorted at a time, and duration of the short-circuit must not exceed one second.
6.7 Switching Characteristics – SNx4LS24x
VCC = 5 V, TA = 25°C (see SN54LS24x and SN74LS24x Devices)
PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
tPLH |
RL = 667 Ω, CL = 45 pF |
SNx4LS240 |
|
9 |
14 |
ns |
SNx4LS241, SNx4LS244 |
|
12 |
18 |
tPHL |
RL = 667 Ω, CL = 45 pF |
|
12 |
18 |
ns |
tPZL |
RL = 667 Ω, CL = 45 pF |
|
20 |
30 |
ns |
tPZH |
RL = 667 Ω, CL = 45 pF |
|
15 |
23 |
ns |
tPLZ |
RL = 667 Ω, CL = 5 pF |
|
10 |
20 |
ns |
tPHZ |
RL = 667 Ω, CL = 5 pF |
|
15 |
25 |
ns |
6.8 Switching Characteristics – SNx4S24x
VCC = 5 V and TA = 25°C (see SN54S24x and SN74S24x Devices)
PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
tPLH |
RL = 90 Ω, CL = 50 pF |
SNx4S240 |
|
4.5 |
7 |
ns |
SNx4S241, SNx4S244 |
|
6 |
9 |
tPHL |
RL = 90 Ω, CL = 50 pF |
SNx4S240 |
|
4.5 |
7 |
ns |
SNx4S241, SNx4S244 |
|
6 |
9 |
tPZL |
RL = 90 Ω, CL = 50 pF |
|
10 |
15 |
ns |
tPZH |
RL = 90 Ω, CL = 50 pF |
SNx4S240 |
|
6.5 |
10 |
ns |
SNx4S241, SNx4S244 |
|
8 |
12 |
tPLZ |
RL = 90 Ω, CL = 5 pF |
|
10 |
15 |
ns |
tPHZ |
RL = 90 Ω, CL = 5 pF |
|
6 |
9 |
ns |
6.9 Typical Characteristics
VCC = 5 V, TA = 25°C, CL = 45 pF, and RL = 667 Ω (unless otherwise noted)
Figure 1. Simulated Propagation Delay From Input to Output