SN74AHCT245DWR OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS led driver circuit
ic programmer circuit
,programmable audio chip
SN74AHCT245DWR OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS led driver circuit
► Inputs Are TTL-Voltage Compatible
►Latch-Up Performance Exceeds 250 mA Per JESD 17
► ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
Description/ordering information These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.
The ’AHCT245 devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses effectively are isolated. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
absolute maximum ratings over operating free-air temperature range
(unless otherwise noted)†
| Supply voltage range, VCC | −0.5 V to 7 V |
| Input voltage range, VI (see Note 1): Control inputs | -0.5 V to 7 V |
| I/O, Output voltage range, VO (see Note 1) | −0.5 V to V CC + 0.5 V |
| Input clamp current, IIK (VI < 0): Control inputs | −20 mA |
| I/O, Output clamp current, IOK (VO < 0 or VO > VCC) | ±20 mA |
| Continuous output current, IO (VO = 0 to VCC) | ±25 mA |
| Continuous current through VCC or GND | ±75 mA |
| Storage temperature range, Tstg | −65°C to 150°C |
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