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74ALVC16245DL-74ALVCH16245DGG
2.5V/3.3V 16-bit bus transceiver with direction pin 3-State
Product specification
Supersedes data of 1998 Jun 16
IC24 Data Handbook
1998 Jun 29
Philips Semiconductors Product specification
74ALVC16245/
74ALVCH1624516-bit bus transceiver with direction pin (3-State)
FEATURES Wide supply voltage range of 1.2V to 3.6V Complies with JEDEC standard no. 8-1A CMOS low power consumption MULTIBYTETM flow-through standard pin-out architecture Low inductance multiple VCC and ground pins for minimum noise
and ground bounce Direct interface with TTL levels All data inputs have bus hold (74ALVCH16245 only) Output drive capability 50Ω transmission lines @ 85°C Current drive ±24 mA at 3.0 V
DESCRIPTIONThe 74ALVC16245(74ALVCH16245) is a 16-bit transceiver featuring
non-inverting 3-State bus compatible outputs in both send and
receive directions.
The 74ALVC16245(74ALVCH16245) features two output enable
(nOE) inputs for easy cascading and two send/receive (nDIR) inputs
for direction control. nOE controls the outputs so that the buses are
effectively isolated. This device can be used as two 8-bit
transceivers or one 16-bit transceiver.
The 74ALVCH16245 has active bus hold circuitry which is provided
to hold unused or floating data inputs at a valid logic level. This
feature eliminates the need for external pull-up or pull-down
resistors.
The 74ALVC16245 has 5V tolerant inputs.
PIN CONFIGURATION
QUICK REFERENCE DATAGND = 0V; Tamb = 25°C; tr = tf ≤ 2.5ns
NOTE: CPD is used to determine the dynamic power dissipation (PD in μW):
PD = CPD × VCC 2 × fi + (CL × VCC 2 × fo) where: fi = input frequency in MHz; CL = output load capacitance in pF;
fo = output frequency in MHz; VCC = supply voltage in V; (CL × VCC 2 × fo) = sum of the outputs.
ORDERING INFORMATION
Philips Semiconductors Product specification
74ALVC16245/
74ALVCH1624516-bit bus transceiver with direction pin (3-State)
PIN DESCRIPTION
LOGIC SYMBOL
FUNCTION TABLE
LOGIC SYMBOL (IEEE/IEC)
BUS HOLD CIRCUIT
Philips Semiconductors Product specification
74ALVC16245/
74ALVCH1624516-bit bus transceiver with direction pin (3-State)
RECOMMENDED OPERATING CONDITIONS
ABSOLUTE MAXIMUM RATINGSIn accordance with the Absolute Maximum Rating System (IEC 134)
Voltages are referenced to GND (ground = 0V)
NOTE: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
Philips Semiconductors Product specification
74ALVC16245/
74ALVCH1624516-bit bus transceiver with direction pin (3-State)
DC CHARACTERISTICSOver recommended operating conditions. Voltage are referenced to GND (ground = 0 V).
NOTES: All typical values are at Tamb = 25°C. Valid for data inputs of bus hold parts.
AC CHARACTERISTICS FOR VCC = 2.3V TO 2.7V RANGEGND = 0V; tr = tf ≤ 2.0ns; CL = 30pF
Philips Semiconductors Product specification
74ALVC16245/
74ALVCH1624516-bit bus transceiver with direction pin (3-State)
AC CHARACTERISTICS FOR VCC = 3.0V TO 3.6V RANGE AND VCC = 2.7VGND = 0V; tr = tf ≤ 2.5ns; CL = 50pF
NOTES: All typical values are measured at Tamb = 25°C. Typical value is measured at VCC = 3.3V
AC WAVEFORMS FOR VCC = 2.3V TO 2.7V AND
VCC < 2.3V RANGEVM = 0.5 VCC
VX = VOL + 0.15V
VY = VOH –0.15V
VOL and VOH are the typical output voltage drop that occur with the
output load.V I = VCC
AC WAVEFORMS FOR VCC = 3.0V TO 3.6V AND
VCC = 2.7V RANGEVM = 1.5 V
VX = VOL + 0.3V
VY = VOH –0.3V
VOL and VOH are the typical output voltage drop that occur with the
output load.V I = 2.7V
Waveform 1. Input (nAn, nBn) to output (nBn, nAn)
propagation delay times
Waveform 2. 3-State enable and disable times
