Philips Semiconductors Product specification
74ALVCH162827
20-bit buffer/line driver, non-inverting, with 30Ω
termination resistors (3-State)
2
1998 Sep 29 853-2127 20100
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
• MULTIBYTE
TM
flow-through standard pin-out architecture
• Low inductance multiple V
CC
and GND pins for minimum noise
and ground bounce
• Integrated 30 W termination resistors
DESCRIPTION
The 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 (nOE
1, 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 V
CC
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 DATA
GND = 0V; T
amb
= 25°C; t
r
= t
f
= 2.5ns
SYMBOL
PARAMETER CONDITIONS TYPICAL UNIT
t
PHL
/t
PLH
Propagation delay
nAn to nYn
V
CC
= 2.5V, C
L
= 30pF
V
CC
= 3.3V, C
L
= 50pF
2.9
2.9
ns
C
I
Input capacitance 5 pF
p
p
p
Output enabled 14
p
PD
I
=
CC
Output disabled 3
NOTES:
1. C
PD
is used to determine the dynamic power dissipation (P
D
in mW):
P
D
= C
PD
× V
CC
2
× f
i
+ S (C
L
× V
CC
2
× f
o
) where:
f
i
= input frequency in MHz; C
L
= output load capacity in pF;
f
o
= output frequency in MHz; V
CC
= supply voltage in V;
S (C
L
× V
CC
2
× f
o
) = sum of outputs.
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER
56-Pin Plastic TSSOP Type II –40°C to +85°C 74ALVCH162827DGG ACH162827DGG SOT364-1
PIN DESCRIPTION
PIN NUMBER SYMBOL FUNCTION
55, 54, 52, 51, 49, 48, 47, 45, 44, 43,
42, 41, 40, 38, 37, 36, 34, 33, 31, 30
1A0 - 1A9
2A0 - 2A9
Data inputs
2, 3, 5, 6, 8, 9, 10, 12, 13, 14,
15, 16, 17, 19, 20, 21, 23, 24, 26, 27
1Y0 - 1Y9
2Y0 - 2Y9
Data outputs
1, 56,
28, 29
1OE1 1OE2,
2OE1, 2OE2
Output enable inputs (active-LOW)
4, 11, 18, 25, 32, 39, 46, 53 GND Ground (0V)
7, 22, 35, 50 V
CC
Positive supply voltage
