SN54HCT245

Features:

Operating Voltage Range of 4.5 V to 5.5 V
High-Current 3-State Outputs Drive Bus Lines Directly or Up To 15 LSTTL Loads
Low Power Consumption, 80-A Max I_CC
Typical tpd = 14 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 A Max
Inputs Are TTL-Voltage Compatible


Pinout




Specifications

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, J_A (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . 70/W
                                                                          DW package . . . . . . . . . . . . . . . . . . . .58/W
                                                                          N package . . . . . . . . . . . . . . . . . . . . . .69/W
                                                                          NS package . . . . . . . . . . . . . . . . . . . .. 60/W
                                                                          PW package . . . . . . . . . . . . . . . . . . . . 83/W
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to 150

† 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.


Description

These octal bus transceivers of HCT245 are designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.

The 'HCT245 devices allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic level at the direction-control (DIR) input. The output-enable (OE) input of HCT245 can be used to disable the device so that the buses are effectively isolated.