21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74AVC+16245
2.5V 16-Bit Bidirectional Transceiver
with 3-State Outputs
Product Features
PI74AVC+16245 is designed for low-voltage operation,
V
CC
= 1.65V to 3.6V
True ±24mA Balanced Drive @ 3.3V
Compatible with Philips and T.I. AVC Logic family
I
OFF
supports partial power-down operation
3.6V I/O Tolerant inputs and outputs
All outputs contain a patented DDC
(Dynamic Drive Control) circuit that reduces noise
without degrading propagation delay
Industrial operation: 40°C to +85°C
Available Packages:
48-pin 240-mil wide plastic TSSOP
48-pin 173-mil wide plastic TVSOP
Product Description
Pericom Semiconductors PI74AVC+ series of logic circuits are
produced using the Companys advanced submicron CMOS
technology, achieving industry leading speed.
The PI74AVC+16245 is a 16-bit bidirectional transceiver designed
for asynchronous two-way communication between data buses.
The direction control input pin (xDIR) determines the direction of
data flow through the bidirectional transceiver. The Direction and
Output Enable controls are designed to operate this device as either
two independent 8-bit transceivers or one 16-bit transceiver. The
output enable (OE) input, when HIGH, disables both A and B ports
by placing them in HIGH Z condition.
To ensure the high-impedance state during power up or power
down, OE should be tied to V
CC
through a pull-up resistor; the
minimum value of the resistor is determined by the current sinking
ability of the driver.
Logic Block Diagram
1DIR
1OE
1A0
1B0
1A1
1B1
1A2
1B2
1A3
1B3
1A4
1B4
1A5
1B5
1A6
1B6
1A7
1B7
2DIR
2OE
2A0
2B0
2A1
2B1
2A2
2B2
2A3
2B3
2A4
2B4
2A5
2B5
2A6
2B6
2A7
2B7
1
PS8524
12/10/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74AVC+16245
2.5V 16-Bit Bidirectional
Transceiver with 3-State Outputs
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Supply voltage range, V
CC
.............................. 0.5V to +4.6V
Input voltage range, V
I
....................................0.5V to +4.6V
Voltage range applied to any output in the
high-impedance or power-off state, V
O
(1)
........0.5V to +4.6V
Voltage range applied to any output in the
high or low state, V
O
(1,2)
........................... 0.5V to V
CC
+0.5V
Input clamp current, I
IK
(V
I
< 0) ................................... 50mA
Output clamp current, I
OK
(V
O
< 0) .............................. 50mA
Continuous output current, I
O
.................................... ±50mA
Continuous current through each V
CC
or GND .......... ±100mA
Package thermal impedance,
θ
JA
(3)
: package A .......... 64°C/W
package K ......... 48°C/W
Storage Temperature range, T
stg
......................65°C to 150°C
Notes:
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.
1. Input & output negative-voltage ratings may be
exceeded if the input and output curent rating are observed.
2. Output positive-voltage rating may be exceeded up to 4.6V
maximum if the output current rating is observed.
3. The package thermal impedance is calculated in accordance with
JESD 51.
Product Pin Configuration
1DIR
1B0
1B1
GND
1B2
1B3
VCC
1B4
1B5
GND
1B6
1B7
2B0
2B1
GND
2B2
2B3
VCC
2B4
2B5
GND
2B6
2B7
2DIR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE
1A0
1A1
GND
1A2
1A3
VCC
1A4
1A5
GND
1A6
1A7
2A0
2A1
GND
2B2
2A3
VCC
2A4
2A5
GND
2A6
2A7
2OE
Product Pin Description
Pin Name
xO E
xDIR
X
A
X
X
B
X
De s cription
3- State Output Enable Inputs (Active LOW)
Direction Control Input
Side A Inputs or 3- State Inputs
Side B Outputs or 3- State Outputs
Ground
Power
GND
V
CC
48-Pin
A,V
Truth Table
(1)
Inputs
(1)
xOE
L
L
H
xDIR
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
Z
Outputs
(1)
Notes:
1. H = High Signal Level
L = Low Signal Level
X = Dont Care or Irrelevant
Z = High Impedance
2
PS8524
12/10/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74AVC+16245
2.5V 16-Bit Bidirectional
Transceiver with 3-State Outputs
Recommended Operating Conditions
(1)
M in.
V
CC
Supply Voltage
Operating
Data retention only
V
CC
= 1.2V
V
IH
High- level Input Voltage
V
CC
= 1.4V to 1.6V
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
CC
= 1.2V
V
CC
= 1.4V to 1.6V
V
IL
Low- level Input Voltage
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
I
V
O
Input Voltage
Output Voltage
Active State
3- State
V
CC
= 1.4V to 1.6V
I
OHS
High- level output current
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
CC
= 1.4V to 1.6V
I
OLS
Low- level output current
V
CC
= 1.65V to 1.95V
V
CC
= 2.3V to 2.7V
V
CC
= 3V to 3.6V
V
CC
= 1.4V to 3.6V
40
0
0
0
1.4
1.2
V
CC
0.65 x V
CC
0.65 x V
CC
1.7
2
GND
0.35 x V
CC
0.35 x V
CC
0.7
0.8
3.6
V
CC
3.6
4
6
12
24
4
6
12
24
5
85
ns/V
°C
mA
V
M ax.
3.6
Units
D
t
D
v Input transition rise or fall rate
T
A
Operating free- air temperature
Notes:
1. All unused inputs must be held at V
CC
or GND to ensure proper device operation.
3
PS8524
12/10/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74AVC+16245
2.5V 16-Bit Bidirectional
Transceiver with 3-State Outputs
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40°C +85°C)
Parame te rs
Te s t Conditions
(1)
I
O H
= 100µA
I
O HS
= 4mA
V
O H
I
O HS
= 6mA
I
O HS
= 12mA
I
O HS
= 24mA
I
O LS
= 100µA
I
O LS
= 4mA
V
O L
I
O LS
= 6mA
I
O LS
= 12mA
I
O LS
= 24mA
I
I
I
O FF
I
O Z
I
C C
Control Inputs
C
I
Data Inputs
C
O
Outputs
V
O
= V
C C
or GND
V
I
= V
C C
or GND
V
I
= V
C C
or GND
V
I
or V
O
= 3.6V
V
O
= V
C C
or GND
V
I
= V
C C
or GND
I
O
= 0
V
IL
= 0.49V
V
IL
= 0.57V
V
IL
= 0.7V
V
IL
= 0.8V
V
IH
= 0.91V
V
IH
= 1.07V
V
IH
= 1.7V
V
IH
= 2V
V
CC
1.4V to 3.6V
1.4V
1.65V
2.3V
3V
1.4V to 3.6V
1.4V
1.65V
2.3V
3V
3.6V
0
3.6V
3.6V
2.5V
3.3V
2.5V
3.3V
2.5V
3.3V
3.5
3.5
6
6
6.5
6.5
pF
M in.
V
C C
0.2V
1.05
1.2
1.75
2.0
0.2
0.4
0.45
0.55
0.8
±2.5
±10
±10
40
µA
V
Typ.
M ax.
Units
Note:
1. Typical values are measured at T
A
= 25°C.
4
PS8524
12/10/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74AVC+16245
2.5V 16-Bit Bidirectional
Transceiver with 3-State Outputs
Switching Characteristics
From
(Input)
A
OE
OE
(Over recommended operating free-air temperature range, unless otherwise noted, see Figures 1 thru 4)
Parame te rs
t
pd
t
en
t
dis
To
(Output)
Y
Y
Y
V
CC
= 1.2V
Typ.
3.9
8.4
8.4
V
CC
= 1.5V
± 0.1V
M in.
0.8
1.5
2.3
4.0
9.2
9.3
V
CC
= 1.8V
± 0.15V
M ax.
3.0
7.0
7.0
0.7
1.4
2.2
V
CC
= 2.5V
± 0.2V
M in.
0.6
1.0
1.1
M ax.
1.9
4.3
4.0
V
CC
= 3.3V
± 0.3V
M in.
0.5
0.7
1.2
M ax.
1.7
3.7
3.9
Units
M ax. M in.
ns
Operating Characteristics,
T
A
= 25°C
Parame te rs
C
pd
Power Dissipation
Capacitance
O utputs Enabled
O utputs Disabled
Te s t Conditions
C
L
= 0pF,
f = 10 MHz
V
CC
= 1.8V
±0.15V
Typical
35
6
V
CC
= 2.5V
±0.2V
Typical
38
6
V
CC
= 3.3V
±0.3V
Typical
44
7
pF
Units
5
PS8524
12/10/01
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