Members of the Texas Instruments Widebust Family 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers Flow-Through Architecture Optimizes PCB Layout Distributed VCC and GND Configuration Minimizes High-Speed Switching Noise EPIC t (Enhanced-Performance Implanted CMOS) 1-mm Process 500-mA Typical Latch-Up Immunity at 125°C Package Options Include Plastic Thin Shrink Small-Outline (DGG) Package, 300-mil Shrink Small-Outline (DL) Package Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Package Using 25-mil Center-to-Center Pin Spacings
The 'AC16245 are 16-bit bus transceivers organized as dual-octal noninverting 3-state transceivers designed for asynchronous two-way communication between data buses. The control function implementation minimizes external timing requirements These 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 input (OE) can be used to disable the devices so that the buses are effectively isolated.
The 74AC16245 is packaged in TI's shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area. The 54AC16245 is characterized for operation over the full military temperature range to 125°C. The 74AC16245 is characterized for operation from to 85°C.
FUNCTION TABLE CONTROL INPUTS L H DIR data to A bus A data to bus Isolation OPERATION
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UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303
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absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC. 7 V Input voltage range, VI (see Note V to VCC 0.5 V Output voltage range, VO (see Note V to VCC 0.5 V Input clamp current, IIK (VI VI > VCC). ±20 mA Output clamp current, IOK (VO VO > VCC). ±50 mA Continuous output current, IO (VO 0 to VCC). ±50 mA Continuous current through VCC or GND. ±400 mA Maximum power dissipation = 55°C (in still air) (see Note 2): DGG package. W DL package. 1.2 W Storage temperature range, Tstg. 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 maximum package power dissipation is calculated using a junction temperature of 150_C and a board trace length of 750 mils.
54AC16245 MIN VCC VIH Supply voltage (see Note 4) High-level input voltage VCC 3 V VCC 4.5 V VCC 5.5 V VCC 3 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC 3 V VCC 4.5 V VCC 5.5 V VCC 3 V IOL t/v Low-level output current Input transition rise or fall rate VCC 4.5 V VCC V 0 VCC 4.5 V VCC 5.5 V VCC NOM 5 MAX 5.5 74AC16245 MIN VCC ns/V °C mA NOM 5 MAX 5.5 UNIT V
TA Operating free-air temperature 55 125 NOTES: 3. All unused pins (input and I/O) must be held high or low to prevent them from floating. 4. All VCC and GND pins must be connected to the proper voltage power supply.
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