SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS272 – NOVEMBER 1994
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI: All inputs 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O ports 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54AS245 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74AS245 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –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 af fect device reliability.
recommended operating conditions
SN54AS245 SN74AS245
MIN NOM MAX MIN NOM MAX
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL Low-level input voltage 0.8 0.8 V
IOH High-level output current –12 –15 mA
IOL Low-level output current 48 64 mA
TAOperating free-air temperature –55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54AS245 SN74AS245
MIN TYP‡MAX MIN TYP‡MAX
VIK VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
VCC = 4.5 V to 5.5 V, IOH = –2 mA VCC –2 VCC –2
IOH = –3 mA 2.4 3.2 2.4 3.2
OH VCC = 4.5 V IOH = –12 mA 2
IOH = –15 mA 2
IOL = 48 mA 0.3 0.55
OL
CC =
.
IOL = 64 mA 0.35 0.55
Control inputs
VI = 7 V 0.1 0.1
IA or B ports
CC =
.
VI = 5.5 V 0.1 0.1
Control inputs
50 20
IH A or B ports§
CC =
.
,
I =
.
70 70 µ
Control inputs
–0.5 –0.5
IL A or B ports§
CC =
.
,
I =
.
–0.75 –0.75
IO¶VCC = 5.5 V, VO = 2.25 V –50 –150 –50 –150 mA
Outputs high 62 97 62 97
ICC VCC = 5.5 V Outputs low 95 143 95 143 mA
Outputs disabled 79 123 79 123
‡All typical values are VCC = 5 V, TA = 25°C.
§For I/O ports, the parameters IIH and IIL include the off-state output current.
¶The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.