PERICOM PI74VCX16245

PI74VCX16245
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2.5V 16-Bit Bidirectional Transceiver
with 3-State Outputs
Product Features
Product Description
• The PI74VCX family is designed for low voltage operation
VDD = 1.8V to 3.6V
• 3.6V I/O Tolerant Inputs and Outputs
• Supports Live Insertion
• Balanced output drive, ±24mA
• Uses patented Noise Reduction Circuitry
• Typical VOLP (Output Ground Bounce)
< 0.6V at VDD = 2.5V, TA = 25ºC
• Typical VOHV (Output VOH Undershoot)
< -0.6V at VDD = 2.5V, TA = 25ºC
• Power-Off High Impedance inputs and outputs
• 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)
Pericom Semiconductor’s PI74VCX series of logic circuits are
produced in the Company’s advanced 0.35 micron CMOS
technology, achieving industry leading speed.
The PI74VCX16245 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 Vcc through a pull-up resistor; the
minimum value of the resistor is determined by the current sinking
ability of the driver.
The PI74VCX family is I/O Tolerant, allowing it to operate in
mixed 1.8V/3.6V systems.
Logic Block Diagram
1DIR
2DIR
1OE
2OE
1A0
2A0
1B0
2B0
1A1
2A1
1B1
2B1
1A2
2A3
1B2
2B2
1A3
2 A4
1B3
2B3
1A4
2A5
1B4
2B4
1A5
2A6
1B5
2B5
1A6
2A7
1B6
2B6
1A7
2A8
1B7
2B7
1
PS8325
09/14/98
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
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Truth Table(1)
Product Pin Description
Pin Name
Inputs (1)
D e s cription
Outputs (1)
xOE
xDIR
Direction Control Input
L
L
Bus B Data to Bus A
xAx
Side A Inputs or 3- STATE Inputs
L
H
Bus A Data to Bus B
xBx
Side B Inputs or 3- STATE O utputs
H
X
High Z State
GND
Ground
VCC
Power
xO E
3- STATE O utput Enable Inputs (Active LO W)
xDIR
Notes:
1. H = High Signal Level
L = Low Signal Level
X = Don’t Care or Irrelevant
Z = High Impedance
Product Pin Configuration
1DIR
1
48
1OE
1B0
2
47
1A0
1B1
3
46
1A1
GND
4
45
GND
1B2
5
44
1A2
43
1A3
48-PIN
A48
V48
1B3
6
VCC
7
42
VCC
1B4
8
41
1A4
1B5
9
40
1A5
GND
10
39
GND
1B6
11
38
1A6
1B7
12
37
1A7
2B0
13
36
2A0
2B1
14
35
2A1
GND
15
34
GND
2B2
16
33
2A2
2B3
17
32
2A3
VCC
18
31
VCC
2B4
19
30
2A4
2B5
20
29
2A5
GND
21
28
GND
2B6
22
27
2A6
2B7
23
26
2A7
2DIR
24
25
2OE
2
PS8325
09/14/98
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Supply Voltage Range, VDD ................................................ –0.5V to 4.6V
Input Voltage Range, VI ......................................................... -0.5V to 4.6V
Output Voltage Range, VO (3-Stated) .......................... -0.5V to 4.6V
Output Voltage Range, VO(1) (Active) ............ –0.5V to VDD + 0.5V
DC Input Diode Current (IIK) VI < 0V .................................... -50mA
DC Output Diode Current (IOK)
VO < 0V ................................................................................ -50mA
VO > VDD ............................................................................................ -50mA
DC Output Source/Sink Current (IOH/IOL) ............................ ±50mA
DC VDD or GND Current per Supply Pin (ICC or GND) .... ±100mA
Storage Temperature Range, TSTG ............................ –65°C to150°C
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
f
o
r
extended periods may affect reliability.
Recommended Operating Conditions(2)
Parame te rs
De s cription
VDD
Supply voltage
VI
Input voltage
VO
Output voltage
Output current in IOH/IOL
Dt/Dv
TA
M in.
M ax.
Operating
1.8
3.6
Data Retention Only
1.2
3.6
- 0.3
3.6
Active State
0
VDD
Off State
0
3.6
VDD = 3.0V to 3.6V
VDD = 2.3V to 2.7V
VDD = 1.8V
Input transistion rise or fall rate(3)
Operating free- air temperature
Units
V
±24
±18
±6
mA
0
10
ns/V
-40
85
ºC
Notes:
1. Absolute maximum of IO must be observed
2. Unused control inputs must be held HIGH or LOW to prevent them from floating
3. As measured between 0.8V and 2.0V, VDD = 3.0V
3
PS8325
09/14/98
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
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Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted)
DC Characteristics (2.7V < VDD ≤ 3.6V)
Parame te rs
De s cription
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
Conditions
VDD
HIGH Level
Output Voltage
2.7 - 3.6
LO W Level
O utput Voltage
M ax.
IOH = -12mA
2.7
IOH = -18mA
3.0
0.8
2.2
2.4
V
2.2
IOL = 100mA
2.7 - 3.6
0.2
IOL = 12mA
2.7
0.4
IOL = 18mA
3.0
0.4
IOL = 24mA
0.55
Input Leakage Current
OV £ VI £ 3.6V
2.7 - 3.6
±5.0
IOZ
3- STATE
Output Leakage
0 £ VO £ 3.6V
VI = VIH or VIL
2.7 - 3.6
±10
IOFF
Power- OFF
Leakage Current
0 £ (VI,VO) £ 3.6V
0
10
IDD
Quiescent Supply Current
II
DIDD
Increase in IDD per input
Units
VDD - 0.2
IOH = -24mA
VOL
Typ.
2.0
IOH = -100mA
VOH
M in.
VI = VDD to GND
mA
20
VDD £ (VI,VO) £ 3.6V
VIH = VDD - 0.6V,
Other inputs at VDD or GND
4
2.7 - 3.6
±20
750
PS8325
09/14/98
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
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DC Characteristics (2.3V ≤ VDD ≤ 2.7V)
Parame te rs
De s cription
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
Conditions
VDD
VOL
HIGH Level
Output Voltage
LOW Level
Output Voltage
Typ.
M ax.
0.7
2.3 - 2.7
VDD - 0.2
IOH = - 6mA
2.3
2.0
IOH = - 12mA
1.8
IOH = - 18mA
1.7
IOL = 100mA
V
2.3 - 2.7
IOL = 12mA
0.2
0.4
2.3
IOL = 18mA
0.6
Input Leakage Current
0V £ V1 £ 3.6V
2.3 - 2.7
±5.0
IOZ
3- STATE Output Leakage
0 £ VO £ 3.6V
VI = VIH or VIL
2.3 - 2.7
±10
IOFF
Power- OFF Leakage Current 0 £ (VI,VO) £ 3.6V
0
10
IDD
Quiescent Supply Current
II
Units
1.6
IOH = - 100mA
VOH
M in.
VI = VDD or GND
VDD £ (V1, V0) £ 3.6V
mA
20
2.3 - 2.7
±20
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
DC Characteristics (1.8V ≤ VDD ≤ 2.3V)
Parame te rs
D e s cription
VIH
HIGH Level Input Voltage
VIL
LO W Level Input Voltage
VOH
HIGH Level O utput Voltage
VOL
LO W Level O utput Voltage
Conditions
VDD
1.8 - 2.3
IOH = - 100mA
M in.
Typ.
M ax.
0.7 x VDD
0.2 x VDD
VDD - 0.2
IOH = - 6mA
V
1.4
IOL = 100mA
Units
0.2
1.8
IOH = - 6mA
0.3
II
Input Leakage Current
0V £ V1 £ 3.6V
±5.0
IOZ
3- State O utput Leakage
0V £ V0 £ 3.6V
VI = VIH or VIL
±10
IOFF
Power- O FF Leakage Current 0V £ (V1,V0) £ 3.6V
IDD
Q uiescent Supply Current
0
10
VI = VDD or GND
1.8
20
VDD £ (V1,V0) £ 3.6V
1.8
±20
5
mA
PS8325
09/14/98
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
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AC Electrical Characteristics
TA = -40°C to +85°C, CL = 30pF, RL = 500W
Symbol
Parame te rs
VDD = 3.3V ± 0.3V VDD = 2.5V ± 0.2V
VDD = 1.8V
M in.
M ax.
M in.
M ax.
M in.
M ax.
tPHL, tPLH Prop Delay
0.8
2.5
1.0
3.2
1.5
5.7
tPZL, tPZH O utput Enable Time
0.8
3.8
1.0
4.9
1.5
7.5
tPLZ, tPHZ O utput Disable Time
0.8
3.7
1.0
4.2
1.5
5.5
tOSHL
tOSLH
O utput to O utput
Skew(2)
0.5
0.5
Units
ns
0.5
Notes:
1. For CL = 50pF, add approximately 300ps to the maximum AC specification
2. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate
outputs of the same device. The specification applies to any outputs switching in the same direction, either HIGH
or LOW (tOSHL) or LOW to HIGH (tOSLH).
Dynamic Switching Characteristics
Symbol
Parame te rs
Conditions
VDD
TA = +25°C Typical
VOLP
Q uiet O utput
Dynamic Peak VOL
CL = 30pF
VIH = VDD
VIL = 0V
1.8
2.5
3.3
0.25
0.6
0.8
VOLV
Q uiet O utput
Dynamic Valley VOL
CL = 30pF
VIH = VDD
VIL = 0V
1.8
2.5
3.3
- 0.25
- 0.6
- 0.8
VOHV
Q uiet O utput
Dynamic Valley VOH
CL = 30pF
VIH = VDD
VIL = 0V
1.8
2.5
3.3
1.5
1.9
2.2
Units
V
Capacitance
Symbols
Parame te rs
TA = +25°C
Typical
Conditions
CIN
Input Capacitance
VDD = 1.8, 2.5V or 3.3V, VI = 0V or VDD
6
COUT
Output Capacitance
VI = 0V or VDD, VDD = 1.8V, 2.5V or 3.3V
7
CPD
Power Dissipation
Capacitance
VI = 0V or VDD, F = 10 MHz
VDD = 1.8V, 2.5V or 3.3V
20
6
Units
pF
PS8325
09/14/98
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
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Test Circuits and Switching Waveforms
Switch Position
Te s t
Parameter Measurement Information (VDD = 1.8V - 3.6V)
2 x VDD
R1
500Ω
From Output
Under Test
Open
RL
500Ω
30pF
CL
S1
tPD
Open
tPLZ/tPZL
2 x VDD
tPHZ/tPZH
GND
GND
Pulse Width
(See Note A)
VDD
Low-High-Low
Pulse
VDD/2
0V
tW
Setup, Hold, and Release Timing
Data
Input
tSU
Timing
Input
tH
VDD
High-Low-High
Pulse
VDD
VDD/2
0V
VDD/2
0V
Propagaton Delay
VDD
VDD/2
0V
VDD
VDD/2
Input
0V
tPHL
tPLH
VDD
Notes:
A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that
the output is LOW except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that
the output is HIGH except when disabled by the output
control.
C. All input pulses are supplied by generators having the follow
ing characteristics:
PRR ≤ 10 MHz, ZO = 50Ω,
tR ≤ 2ns,
tF ≤ 2ns,
measured from 10% to 90%, unless otherwise specified.
D. The outputs are measured one at a time with one transition per
measurement.
Output
VDD/2
VOL
tPHL
tPLH
VDD
Opposite Phase
Input Transition
VDD/2
0V
Enable Disable Timing
VDD
Output
Control
(Active LOW)
VDD/2
0V
tPLZ
tPZL
VDD
Output
Waveform 1
S1 at 2xVDD
(see Note B)
Output
Waveform 2
S1 at GND
VDD
VDD/2
+0.15V
tPZH
VOL
tPHZ
-0.15V
VOH
VDD/2
0V
(see Note B)
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
7
PS8325
09/14/98