SN54HC645 Datasheet, PDF (2/12 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54HC645, SN74HC645
OCTAL BUS TRANSCEIVERS
WITH 3ĆSTATE OUTPUTS
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002
logic diagram (positive logic)
OE ¹⁹
1
DIR
2
A1
18
B1
To Seven Other Transceivers
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)^†
Supply voltage range, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input clamp current, I_IK (V_I < 0 or V_I > V_CC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, I_OK (V_O < 0 or V_O > V_CC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, I_O (V_O = 0 to V_CC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA
Continuous current through V_CC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA
Package thermal impedance, θ_JA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
† _{Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and}
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions (see Note 3)
VCC Supply voltage
VIH High-level input voltage
VIL
Low-level input voltage
VI
Input voltage
VO
Output voltage
∆t/∆v Input transition rise/fall time
TA
Operating free-air temperature
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
VCC = 2 V
VCC = 4.5 V
VCC = 6 V
SN54HC645
MIN NOM MAX
2
5
6
1.5
3.15
4.2
0.5
1.35
1.8
0
VCC
0
VCC
1000
500
400
–55
125
SN74HC645
MIN NOM MAX
2
5
6
1.5
3.15
4.2
0.5
1.35
1.8
0
VCC
0
VCC
1000
500
400
–40
85
UNIT
V
V
V
V
V
ns
°C
2
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