Datasheet

5
SN54HCT245 , SN74HCT245
www.ti.com SCLS020F –MARCH 1984–REVISED AUGUST 2016
Product Folder Links: SN54HCT245 SN74HCT245
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(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
6.4 Thermal Information
THERMAL METRIC
(1)
SNx4HCT245
UNIT
J
(CDIP)
W
(CFP)
FK
(LCCC)
DB
(SSOP)
DW
(SOIC)
N
(PDIP)
NS
(SO)
PW
(TSS
OP)
20
PINS
20
PINS
20
PINS
20
PINS
20
PINS
20
PINS
20
PINS
20
PINS
R
θJA
Junction-to-ambient thermal resistance — — — 84.6 70.4 43.4 68.9 94.9 °C/W
R
θJC(top)
Junction-to-case (top) thermal resistance 38.7 60.8 37.1 44.3 36.5 29.5 34.7 30.2 °C/W
R
θJB
Junction-to-board thermal resistance 49.8 100.4 36.1 40.2 38.1 24.3 36.4 45.7 °C/W
ψ
JT
Junction-to-top characterization parameter — — — 11.1 11.3 15 11.6 1.5 °C/W
ψ
JB
Junction-to-board characterization parameter — — — 39.7 37.7 24.2 36 45.1 °C/W
R
θJC(bot)
Junction-to-case (bottom) thermal resistance 11.5 8.5 4.3 — — — — — °C/W
(1) This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or V
CC
.
(2) Parameter C
i
does not apply to transceiver I/O ports.
6.5 Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
OH
V
I
= V
IH
or V
IL
I
OH
= –20 µA
T
A
= 25°C
4.5 V
4.4 4.499
V
SN54HCT245 4.4
SN74HCT245 4.4
I
OH
= –6 mA
T
A
= 25°C 3.98 4.3
SN54HCT245 3.7
SN74HCT245 3.84
V
OL
V
I
= V
IH
or V
IL
I
OL
= 20 µA
T
A
= 25°C
4.5 V
0.001 0.1
V
SN54HCT245 0.1
SN74HCT245 0.1
I
OL
= 6 mA
T
A
= 25°C 0.17 0.26
SN54HCT245 0.4
SN74HCT245 0.33
I
I
DIR or OE V
I
= V
CC
or 0
T
A
= 25°C
5.5 V
±0.1 ±100
nASN54HCT245 ±1000
SN74HCT245 ±1000
I
OZ
A or B V
O
= V
CC
or 0
T
A
= 25°C
5.5 V
±0.01 ±0.5
µASN54HCT245 ±10
SN74HCT245 ±5
I
CC
V
I
= V
CC
or 0, I
O
= 0
T
A
= 25°C
5.5 V
8
µASN54HCT245 160
SN74HCT245 80
∆I
CC
(1)
One input at 0.5 V or
2.4 V,
Other inputs at 0 or
VCC
T
A
= 25°C
5.5 V
1.4 2.4
mA
SN54HCT245 3
SN74HCT245 2.9
C
i
(2)
DIR or OE
T
A
= 25°C
4.5 V to
5.5 V
3 10
pFSN54HCT245 10
SN74HCT245 10