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PS8086B 10/07/98
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Inverting 16-Bit Buffer Driver
with 3-STATE Outputs
PI74ALVCH16240
Product Description
Pericom Semiconductors PI74ALVCH series of logic circuits
are produced in the Companys advanced 0.5 micron CMOS
technology, achieving industry leading speed.
The PI74ALVCH16240 is an inverting 16-bit buffer/driver
designed for low voltage 2.3V to 3.6V VCC operation.
The buffer/driver is designed specifically to improve both the
performance and density of 3-STATE memory address drivers,
clock drivers, and bus-oriented receivers and transmitters.
The device can be used as four 4-bit buffers, two 8-bit buffers, or
one 16-bit buffer. It provides inverting outputs and symmetrical
active-low output-enable (OE) inputs.
To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pullup resistor in which
the minimum value is determined by the current-sinking capability of the driver.
The PI74ALVCH16240 has Bus Hold which retains the data
inputs last state whenever the data input goes to high-impedance
preventing floating inputs and eliminating the need for pullup/
down resistors.
Product Features
• PI74ALVCH16240 is designed for low voltage operation
• V
CC
= 2.3V to 3.6V
• Hysteresis on all inputs
• Typical V
OLP
(Output Ground Bounce)
< 0.8V at VCC = 3.3V, TA = 25°C
• Typical V
OHV
(Output VOH Undershoot)
< 2.0V at VCC = 3.3V, TA = 25°C
• Bus Hold retains last active bus state during 3-STATE,
eliminating the need for external pullup resistors
• Industrial operation at 40°C to +85°C
• Packages available:
48-pin 240 mil wide plastic TSSOP (A)
48-pin 300 mil wide plastic SSOP (V)
Logic Block Diagram
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PS8086B 10/07/98
PI74ALVCH16240
Inverting 16-Bit Buffer Driver
with 3-STATE Outputs
stupnIstuptuO
EOXAXY
LH L
LL H
HX Z
Pin Name Description
OE 3-State Output Enable Inputs (Active LOW)
Ax Inputs
Yx 3-State Outputs
GND Ground
V
CC
Power
Product Pin Description Truth Table
(1)
Product Pin Configuration
Notes:
1. H = High Signal Level
L = Low Signal Level
X = Don't Care or Irrelevant
Z = High Impedance
Page 3
PI74ALVCH16240
Inverting 16-Bit Buffer Driver
with 3-STATE Outputs
3
PS8086B 10/07/98
Storage Temperature ............................................................65°C to +150°C
Ambient Temperature with Power Applied .......................... 40°C to +85°C
Input Voltage Range, V
IN
....................................................
0.5V to V
CC
+0.5V
Output Voltage Range, V
OUT
.............................................
0.5V to V
CC
+0.5V
DC Input Voltage ................................................................... 0.5V to +5.0V
DC Output Current.............................................................................. 100 mA
Power Dissipation ................................................................................... 1.0W
Note:
Stresses greater than those listed under MAXIMUM RATINGS
may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other
conditions above those indicated in the operational sections of
this specification is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect reliability.
DC Electrical Characteristics (Over the Operating Range, T
A
= 40°C to +85°C, VCC = 3.3V ±10%)
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
sretemaraPnoitpircseDsnoitidnoCtseT
)1(
.niM.pyT
)2(
.xaMstinU
V
CC
egatloVylppuS3.26.3
V
V
HI
)3(
egatloVHGIHtupnI
V
CC
V7.2otV3.2=7.1
V
CC
V6.3otV7.2=0.2
V
LI
)3(
egatloVWOLtupnI
V
CC
V7.2otV3.2=7.0
V
CC
V6.3otV7.2=8.0
V
NI
)3(
egatloVtupnI0V
CC
V
TUO
)3(
egatloVtuptuO0V
CC
V
HO
tuptuO
HGIH
egatloV
I
HO
001-= m V,A
CC
=.xaMot.niMV
CC
2.0-
V
HI
I,V7.1=
HO
6-=V,Am
CC
=V3.20.2
V
HI
I,V7.1=
HO
21-=V,Am
CC
=V3.27.1
V
HI
I,V0.2=
HO
21-=V,Am
CC
=V7.22.2
V
HI
I,V0.2=
HO
21-=V,Am
CC
=V0.34.2
V
HI
I,V0.2=
HO
42-=V,Am
CC
=V0.30.2
V
LO
tuptuO
WOL
egatloV
I
LO
001= m V,A
LI
=.xaMot.niM2.0
V
LI
I,V7.0=
LO
6=V,Am
CC
=V3.24.0
V
LI
I,V7.0=
LO
21=V,Am
CC
=V3.27.0
V
LI
I,V8.0=
LO
21=V,Am
CC
=V7.24.0
V
LI
I,V8.0=
LO
42=V,Am
CC
=V0.355.0
I
HO
)3(
tuptuO
HGIH
tnerruC
V
CC
V3.2=21-
Am
V
CC
V7.2=21-
V
CC
V0.3=42-
I
LO
)3(
tuptuO
WOL
tnerruC
V
CC
V3.2=21
V
CC
V7.2=21
V
CC
V0.3=42
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PS8086B 10/07/98
PI74ALVCH16240
Inverting 16-Bit Buffer Driver
with 3-STATE Outputs
sretemaraP)TUPNI(morF)TUPTUO(oT
V
CC
V2.0±V5.2=V
CC
V7.2=VCCV3.0±V3.3=
stinU
.niM
)2(
.xaM.niM
)2(
.xaM.niM
)2(
.xaM
t
DP
AY0.13.53.50.19.3
snt
NE
EOY0.14.61.60.10.5
t
SID
EOY5.14.58.40.14.4
noitpircseD
D /t Dv
)3(
llaFroesiRnoitisnarTtupnI001001001V/sn
Switching Characteristics over Operating Range
(1)
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
Operating Characteristics, TA = 25ºC
retemaraPsnoitidnoCtseT
V
CC
V2.0±V5.2=VCCV3.0±V3.3=
stinU
lacipyT
C
DP
noitapissiDrewoP
ecnaticapaC
delbanEstuptuO
C
L
,Fp05=
zHM01=f
6191
Fp
delbasiDstuptuO45
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. Recommended operating condition.
Notes:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 3.3V, +25°C ambient and maximum loading.
3. Unused Control Inputs must be held HIGH or LOW to prevent them from floating.
DC Electrical Characteristics-Continued (Over the Operating Range, T
A
= 40°C to +85°C, VCC = 3.3V ±10%)
sretemaraPnoitpircseDsnoitidnoCtseT
)1(
.niM.pyT
)2(
.xaMstinU
I
NI
tnerruCtupnIV
NI
V=
CC
V,DNGro
CC
V6.3=5±
mA
I
NI
(
HOLD
)
tupnI
dloH
tnerruC
V
NI
V,V7.0=
CC
V3.2=54
V
NI
V,V7.1=
CC
V3.2=54-
V
NI
V,V8.0=
CC
V0.3=57
V
NI
V,V0.2=
CC
V0.3=57-
V
NI
0=otV,V6.3
CC
V6.3=005±
I
ZO
)stuptuOETATS-3(tnerruCtuptuOV
TUO
V=
CC
ro,DNGVCCV6.3=01±
I
CC
tnerruCylppuS
V
CC
=V6.3I,
TUO
0= m ,A
V
NI
VroDNG=
CC
04
DI
CC
tupnIreptnerruCylppuS
HGIHLTT@
V
CC
V0.3=ot6.3V
VtatupnIenO
CC
-V6.0
VtastupnIrehtO
CC
DNGro
057
C
I
stupnIlortnoC
V
NI
V=
CC
V,DNGro
CC
V3.3=
3
FpstupnIataD6
C
O
stuptuOV
O
V=
CC
V,DNGro
CC
V3.3=7
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