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PI74ALVCH16270A
Datasheet (PERICOM)
5 pgs332.52 Kb0

Datasheet PI74ALVCH16270A, PI74ALVCH16270V Datasheet (PERICOM)

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Page 1
PI74ALVCH16270
12-Bit To 24-Bit Registered Bus Exchanger with 3-State Outputs
1
PS8171A 03/17/98
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Product Description
Pericom Semiconductors PI74ALVCH series of logic circuits are produced in the Companys advanced 0.5 micron CMOS technology, achieving industry leading speed.
The PI7ALVCH16270 is used in applications where data must be transferred from a narrow high-speed bus to a wider lower frequency bus.
The device provides synchronous data exchange between the two ports. Data is stored in the internal registers on the low-to-high transition of the clock (CLK) input when the appropriate CLKEN inputs are low. The select (SEL) line selects 1B or 2B data for the A outputs. For data transfer in the A-to-B direction, a two stage pipeline is provided in the A-to1B path,with a single storage register in the A-to-2B path. Proper control of the CLKENA inputs allows two sequential 12-bit words to be presented synchronously as a 24-bit on the B port. Data flow is controlled by the active-low output enables (OEA, OEB). The control terminals are registered to synchronize the bus direction changes with the CLK.
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 capability of the driver. Due to OE being routed through a register, the active state of the outputs cannot be determined prior to the arrival of the first clock pulse.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
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PI74ALVCH16270
12-Bit To 24-Bit Registered Bus Exchanger
with 3-State Outputs
Logic Block Diagram
Product Features
• PI74ALVCH16270 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:
 56-pin 240 mil wide plastic TSSOP (A)  56-pin 300 mil wide plastic SSOP (V)
Page 2
2
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PS8171A 03/17/98
PI74ALVCH16270
12-Bit To 24-Bit Registered Bus Exchanger with 3-State Outputs
stupnIstuptuO
KLCAEOBEOA B2,B1
HH Z Z
HL Z evitcA
LH evitcAZ
LL evitcAevitcA
stupnI
stuptuO
A
B1NEKLCB2NEKLCKLCLESB1B2
HXXHXX 0A
)3(
XHXLXX0A
)3(
LX
H
LX L
LX
H
HX H
XLLXL L
XLLXH H
STUPNISTUPTUO
1ANEKLC2ANEKLCKLCAB1B2
LHLL
)2(
0B2
)3(
LHHH
)2(
0B2
)3(
LLLL
)2(
L
LLHH
)2(
H
HLL0B1
)3(
L
HLH0B1
)3(
H
HHXX0B1
)3(
0B2
)3(
Pin Name Description
OE Output Enable Input (Active LOW) CLK Clock SEL Select (Active Low) CLKEN Clock Enable (Active Low) A,1B,2B 3-State Outputs GND Ground VCC Power
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34
33 25 26 27 28
32
31
30
29
Product Pin Description
Notes:
1. H = High Signal Level L = Low Signal Level X = Irrelevant Z = High Impedance ↑ = Transition, Low to High
2. Two CLK edges are needed to propagate data.
3. Output level before the indicated steady state
input conditions were established.
Product Pin Configuration
56-PIN
A56 V56
OEA
CLKEN1B
2B3
GND
2B2 2B1
V
CC
A1 A2 A3
GND
A4 A5 A6 A7 A8 A9
GND
A10 A11 A12
V
CC
1B1 1B2
GND
1B3
CLKEN2B
SEL
OEB CLKENA2 2B4 GND 2B5 2B6 V
CC 2B7 2B8 2B9 GND 2B10 2B11 2B12 1B12 1B11 1B10 GND 1B9 1B8 1B7 V
CC 1B6
1B5 GND 1B4 CLKENA1 CLK
Truth Tables
(1)
A to B Storage (OEB = L)
B to A Storage (OEA = L)
Page 3
PI74ALVCH16270
12-Bit To 24-Bit Registered Bus Exchanger with 3-State Outputs
3
PS8171A 03/17/98
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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.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ± 10%)
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
Page 4
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PS8171A 03/17/98
PI74ALVCH16270
12-Bit To 24-Bit Registered Bus Exchanger with 3-State Outputs
sretemaraPnoitpircseD
V
CC
V2.0±V5.2=V
CC
V7.2=V
CC
V3.0±V3.3=
stinU
.niM.xaM.niM.xaM.niM.xaM
f
KCOLC
ycneuqerfkcolC005100510 051zhM
t
W
,noitarudesluP
woLroHGIHKLC
3.33.33.3
sn
t
US
emitputeS
KLCerofebatadA 1.48.31.3 KLCerofebatadB 9.02.19.0
2ANEKLCro1ANEKLC
KLCerofeb
5.32.37.2
B2NEKLCroB1NEKLC
KLCerofeb
4.336.2
KLCerofebatadEO 4.49.32.3
t
H
emitdloH
KLCretfaatadA 002.0 KLCretfaatadB 4.117.1
2ANEKLCro1ANEKLC
KLCerofeb
01.03.0
B2NEKLCroB1NEKLC
KLCerofeb
006.0
KLCretfaEO 001.0
D /t DV
)1(
noitisnarTtupnI
llaFroesiR
0010010 01V/sn
Timing Requirements over Operating Range
Notes:
1. Unused control inputs must be held HIGH or LOW to prevent them from floating.
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
stupnIlortnoCV
NI
V=
CC
V,DNGro
CC
V3.3=5.3
Fp
C
O
stuptuOV
O
V=
CC
V,DNGro
CC
V3.3=9
Page 5
PI74ALVCH16270
12-Bit To 24-Bit Registered Bus Exchanger with 3-State Outputs
5
PS8171A 03/17/98
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Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
Switching Characteristics over Operating Range
(1)
sretemaraP
morF
)TUPNI(
oT
)TUPTUO(
V
CC
V2.0±V5.2=VCCV7.2=V
CC
V3.0±V3.3=
stinU
.niM
)2(
.xaM.niM
)2(
.xaM.niM
)2(
.xaM
)2(
F
XAM
051051051
sn
KLCB25.68.51.11.5
KLCA7.16 4.51 7.4
t
DP
LESA9.18.64.61 5.5
t
NE
KLCBroA6.15.78.616
t
SID
KLCBroA6.24.75.61.18.5
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
78021
Fp
delbasiDstuptuO5.08811
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