SN74AVC16245 Datasheet, PDF (1/11 Pages) Texas Instruments – 16-BIT BUS TRANSCEIVER WITH 3-STATE OUTPUTS

D Member of the Texas Instruments
Widebus ™ Family
D EPIC™ (Enhanced-Performance Implanted
CMOS) Submicron Process
D DOC™ (Dynamic Output Control) Circuit
Dynamically Changes Output Impedance,
Resulting in Noise Reduction Without
Speed Degradation
D Less Than 2-ns Maximum Propagation
Delay at 2.5-V and 3.3-V V_CC
D Dynamic Drive Capability Is Equivalent to
Standard Outputs With I_OH and I_OL of
±24 mA at 2.5-V V_CC
SN74AVC16245
16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES142L – JULY 1998 – REVISED FEBRUARY 2000
D Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
D I_off Supports Partial-Power-Down Mode
Operation
D ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
D Latch-Up Performance Exceeds 250 mA Per
JESD 78
D Package Options Include Plastic Thin
Shrink Small-Outline (DGG) and Thin Very
Small-Outline (DGV) Packages
description
A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output
impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1
shows typical V_OL vs I_OL and V_OH vs I_OH curves to illustrate the output impedance and drive capability of the
circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is
equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC
Logic Family Technology and Applications, literature number SCEA006, and Dynamic Output Control (DOC™)
Circuitry Technology and Applications, literature number SCEA009.
3.2 _{TA = 25°C}
2.8 ^{Process = Nominal}
2.4
2.0
VCC = 3.3 V
TA = 25°C
2.8 Process = Nominal
2.4
2.0
1.6
VCC = 2.5 V
1.2
VCC = 1.8 V
0.8
0.4
0 17 34 51 68 85 102 119 136 153 170
IOL – Output Current – mA
1.6
1.2
0.8
VCC = 3.3 V
0.4
VCC = 2.5 V
VCC = 1.8 V
–160 –144 –128 –112 –96 –80 –64 –48 –32 –16 0
IOH – Output Current – mA
Figure 1. Output Voltage vs Output Current
This 16-bit (dual octal) noninverting bus transceiver is operational at 1.2-V to 3.6-V V_CC, but is designed
specifically for 1.65-V to 3.6-V V_CC operation.
The SN74AVC16245 is designed for asynchronous communication between data buses. The control-function
implementation minimizes external timing requirements.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows 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 are effectively isolated.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DOC, EPIC, and Widebus are trademarks of Texas Instruments Incorporated.
PRODUCTION DATA information is 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.
Copyright © 2000, Texas Instruments Incorporated
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