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74ALVT16543DGG
2.5V/3.3V ALVT 16-bit registered transceiver 3-State
Product specification
Supersedes data of 1995 Dec 21
IC23 Data Handbook
1998 Feb 13
Philips Semiconductors Product specification
74ALVT165432.5V/3.3V 16-bit registered transceiver (3-State)
FEATURES• 16-bit universal bus interface• 5V I/O Compatible• 3-State buffers• Output capability: +64mA/-32mA• TTL input and output switching levels• Input and output interface capability to systems at 5V supply• Bus-hold data inputs eliminate the need for external pull-up
resistors to hold unused inputs• Live insertion/extraction permitted• Power-up 3-State• Power-up reset• No bus current loading when output is tied to 5V bus• Latch-up protection exceeds 500mA per JEDEC Std 17• ESD protection exceeds 2000V per MIL STD 883 Method 3015
and 200V per Machine Model
DESCRIPTIONThe 74ALVT16543 is a high-performance BiCMOS product
designed for VCC operation at 2.5V or 3.3V with I/O compatibility up
to 5V. The device can be used as two 8-bit transceivers or one
16-bit transceiver.
The 74ALVT16543 contains two sets of eight D-type latches, with
separate control pins for each set. Using data flow from A to B as an
example, when the A-to-B Enable (nEAB) input and the A-to-B Latch
Enable (nLEAB) input are Low, the A-to-B path is transparent.
A subsequent Low-to-High transition of the nLEAB signal puts the A
data into the latches where it is stored and the B outputs no longer
change with the A inputs. With nEAB and nOEAB both Low, the
3-State B output buffers are active and display the data present at
the outputs of the A latches.
Control of data flow from B to A is similar, but using the nEBA,
nLEBA, and nOEBA inputs.
Active bus-hold circuitry is provided to hold unused or floating data
inputs at a valid logic level.
QUICK REFERENCE DATA
ORDERING INFORMATION
LOGIC SYMBOL (IEEE/IEC)
Philips Semiconductors Product specification
74ALVT165432.5V/3.3V 16-bit registered transceiver (3-State)
PIN CONFIGURATION
LOGIC SYMBOL
PIN DESCRIPTION
Philips Semiconductors Product specification
74ALVT165432.5V/3.3V 16-bit registered transceiver (3-State)
LOGIC DIAGRAM
FUNCTION TABLE= High voltage level= High voltage level one set-up time prior to the Low-to-High transition of nLEXX or nEXX (XX = AB or BA)= Low voltage level = Low voltage level one set-up time prior to the Low-to-High transition of nLEXX or nEXX (XX = AB or BA)= Don’t care
Philips Semiconductors Product specification
74ALVT165432.5V/3.3V 16-bit registered transceiver (3-State)
ABSOLUTE MAXIMUM RATINGS1, 2
NOTES: Stresses beyond those listed 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. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C. The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
Philips Semiconductors Product specification
74ALVT165432.5V/3.3V 16-bit registered transceiver (3-State)
DC ELECTRICAL CHARACTERISTICS (3.3V 0.3V RANGE)
NOTES: All typical values are at VCC = 3.3V and Tamb = 25°C. This is the increase in supply current for each input at the specified voltage level other than VCC or GND This parameter is valid for any VCC between 0V and 1.2V with a transition time of up to 10msec. From VCC = 1.2V to VCC = 3.3V ± 0.3V a
transition time of 100μsec is permitted. This parameter is valid for Tamb = 25°C only. Unused pins at VCC or GND. ICCZ is measured with outputs pulled up to VCC or pulled down to ground. For valid test results, data must not be loaded into the flip-flops (or latches) after applying power. This is the bus hold overdrive current required to force the input to the opposite logic state.
Philips Semiconductors Product specification
74ALVT165432.5V/3.3V 16-bit registered transceiver (3-State)
DC ELECTRICAL CHARACTERISTICS (2.5V 0.2V RANGE)
NOTES: All typical values are at VCC = 2.5V and Tamb = 25°C. This is the increase in supply current for each input at the specified voltage level other than VCC or GND This parameter is valid for any VCC between 0V and 1.2V with a transition time of up to 10msec. From VCC = 1.2V to VCC = 2.5V ± 0.2V a
transition time of 100μsec is permitted. This parameter is valid for Tamb = 25°C only. Unused pins at VCC or GND. ICCZ is measured with outputs pulled up to VCC or pulled down to ground. Not guaranteed. For valid test results, data must not be loaded into the flip-flops (or latches) after applying power.
