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74ALVCH162827
20-bit buffer/line driver, non-inverting, with 30 Ohm termination resistors (3-State)
Product specification
IC24 Data Handbook
1998 Sep 29
Philips Semiconductors Product specification
74ALVCH16282720-bit buffer/line driver, non-inverting, with 30Ω
termination resistors (3-State)
FEATURES Complies with JEDEC standard no. 8-1A. CMOS low power consumption Direct interface with TTL levels Current drive ± 12 mA at 3.0 V MULTIBYTETM flow-through standard pin-out architecture Low inductance multiple VCC and GND pins for minimum noise
and ground bounce Integrated 30 � termination resistors
DESCRIPTIONThe 74ALVCH162827 high-performance CMOS device combines
low static and dynamic power dissipation with high speed and high
output drive.
The 74ALVCH162827 20-bit buffers provide high performance bus
interface buffering for wide data/address paths or buses carrying
parity. They have NAND Output Enables (nOE1, nOE2) for
maximum control flexibility.
The 74ALVCH162827 is designed with 30Ω series resistance in both
the pull-up and pull-down output structures. This design reduces line
noise in applications such as memory address drivers, clock drivers
and bus receivers/transmitters.
To ensure the high impedance state during power up or power
down, OE should be tied to VCC through a pullup resistor; the
minimum value of the resistor is determined by the
current-sinking/current-sourcing capability of the driver.
Active bus-hold circuitry is provided to hold unused or floating data
inputs at a valid logic level.
QUICK REFERENCE DATAGND = 0V; Tamb = 25°C; tr = tf = 2.5ns
NOTES: CPD is used to determine the dynamic power dissipation (PD in �W):
PD = CPD × VCC2 × fi + � (CL × VCC2 × fo) where:
fi = input frequency in MHz; CL = output load capacity in pF;
fo = output frequency in MHz; VCC = supply voltage in V;
� (CL × VCC2 × fo) = sum of outputs.
ORDERING INFORMATION
PIN DESCRIPTION
Philips Semiconductors Product specification
74ALVCH16282720-bit buffer/line driver, non-inverting, with 30Ω
termination resistors (3-State)
PIN CONFIGURATION
LOGIC SYMBOL
LOGIC SYMBOL (IEEE/IEC)
FUNCTION TABLE= Don’t care= High impedance “off” state= High voltage level= Low voltage level
Philips Semiconductors Product specification
74ALVCH16282720-bit buffer/line driver, non-inverting, with 30Ω
termination resistors (3-State)
LOGIC DIAGRAM
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
74ALVCH16282720-bit buffer/line driver, non-inverting, with 30Ω
termination resistors (3-State)
DC ELECTRICAL 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.
Philips Semiconductors Product specification
74ALVCH16282720-bit buffer/line driver, non-inverting, with 30Ω
termination resistors (3-State)
AC CHARACTERISTICS FOR VCC = 2.5V ± 0.2VGND = 0V; tr = tf ≤ 2.0ns; CL = 30pF
NOTE: All typical values are at VCC = 2.5V and Tamb = 25°C.
AC CHARACTERISTICS FOR VCC = 3.0V ± 0.3VGND = 0V; tr = tf ≤ 2.5ns; CL = 50pF
NOTES: All typical values are at VCC Tamb = 25°C. Typical value is measured at VCC = 3.3V.
