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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74VCX16245
2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
Product Features
* 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 = 25C * Typical VOHV (Output VOH Undershoot) < -0.6V at VDD = 2.5V, TA = 25C * Power-Off High Impedance inputs and outputs * Industrial operation at 40C to +85C * Packages available: 48-pin 240 mil. wide plastic TSSOP (A) 48-pin 300 mil. wide plastic SSOP (V)
Product Description
Pericom Semiconductors PI74VCX series of logic circuits are produced in the Companys 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 1OE 1A0 1B0 1A1 1B1 1A2 1B2 1A3 1B3 1A4 1B4
1A5 2A6 2A5 2 A4 2A3 2A1
2DIR
2OE
2A0
2B0
2B1
2B2
2B3
2B4
1B5 1A6 1B6 1A7 1B7
2A8 2A7
2B5
2B6
2B7
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PI74VCX16245 2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
Truth Table(1)
Product Pin Description
Pin Name xO E xDIR xAx xBx GND VCC D e s cription 3- STATE O utput Enable Inputs (Active LO W) Direction Control Input Side A Inputs or 3- STATE Inputs Side B Inputs or 3- STATE O utputs Ground Power
Inputs (1) xOE L L H xDIR L H X
Outputs (1) Bus B Data to Bus A Bus A Data to Bus B High Z State
Notes: 1. H = High Signal Level L = Low Signal Level X = Don't Care or Irrelevant Z = High Impedance
Product Pin Configuration
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
1DIR 1B0 1B1 GND 1B2 1B3 VCC 1B4 1B5 GND 1B6 1B7 2B0 2B1 GND 2B2 2B3 VCC 2B4 2B5 GND 2B6 2B7 2DIR
1OE 1A0 1A1 GND 1A2 1A3 VCC 1A4 1A5 GND 1A6 1A7 2A0 2A1 GND 2A2 2A3 VCC 2A4 2A5 GND 2A6 2A7 2OE
48-PIN A48 V48
45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
2
PS8325
09/14/98
PI74VCX16245 2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
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 ............................ -65C to150C
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 VDD VI VO Supply voltage Input voltage Output voltage Active State Off State VDD = 3.0V to 3.6V VDD = 2.3V to 2.7V VDD = 1.8V 0 -40 De s cription Operating Data Retention Only M in. 1.8 1.2 - 0.3 0 0 M ax. 3.6 3.6 3.6 VDD 3.6 24 18 6 10 85 mA ns/V C V Units
Output current in IOH/IOL Dt/Dv TA
Input transistion rise or fall rate(3) Operating free- air temperature
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
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PI74VCX16245 2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted)
DC Characteristics (2.7V < VDD 3.6V)
Parame te rs VIH VIL De s cription HIGH Level Input Voltage LOW Level Input Voltage IOH = -100mA VOH HIGH Level Output Voltage IOH = -12mA IOH = -18mA IOH = -24mA IOL = 100mA VOL LO W Level O utput Voltage IOL = 12mA IOL = 18mA IOL = 24mA II IOZ IOFF IDD DIDD Input Leakage Current 3- STATE Output Leakage Power- OFF Leakage Current Quiescent Supply Current Increase in IDD per input OV VI 3.6V 0 VO 3.6V VI = VIH or VIL 0 (VI,VO) 3.6V VI = VDD to GND VDD (VI,VO) 3.6V VIH = VDD - 0.6V, Other inputs at VDD or GND 2.7 - 3.6 2.7 - 3.6 2.7 - 3.6 0 2.7 3.0 2.7 - 3.6 2.7 3.0 2.7 - 3.6 VDD - 0.2 2.2 2.4 2.2 0.2 0.4 0.4 0.55 5.0 10 10 20 20 750 V Conditions VDD M in. 2.0 0.8 Typ. M ax. Units
mA
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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 VIH VIL De s cription HIGH Level Input Voltage LOW Level Input Voltage IOH = - 100mA VOH HIGH Level Output Voltage IOH = - 6mA IOH = - 12mA IOH = - 18mA VOL II IOZ IOFF IDD LOW Level Output Voltage Input Leakage Current 3- STATE Output Leakage IOL = 100mA IOL = 12mA IOL = 18mA 0V V1 3.6V 0 VO 3.6V VI = VIH or VIL VI = VDD or GND VDD (V1, V0) 3.6V 2.3 - 2.7 2.3 2.3 - 2.7 2.3 - 2.7 0 2.3 - 2.7 2.3 2.3 - 2.7 VDD - 0.2 2.0 1.8 1.7 0.2 0.4 0.6 5.0 10 10 20 20 mA V Conditions VDD M in. 1.6 0.7 Typ. M ax. Units
Power- OFF Leakage Current 0 (VI,VO) 3.6V Quiescent Supply Current
Electrical Characteristics over Recommended Operating Free-Air Temperature Range DC Characteristics (1.8V VDD 2.3V)
Parame te rs VIH VIL VOH VOL II IOZ IOFF IDD D e s cription HIGH Level Input Voltage LO W Level Input Voltage HIGH Level O utput Voltage IOH = - 100mA IOH = - 6mA IOL = 100mA IOH = - 6mA 0V V1 3.6V 0V V0 3.6V VI = VIH or VIL 0 1.8 1.8 VI = VDD or GND VDD (V1,V0) 3.6V 1.8 Conditions VDD 1.8 - 2.3 M in. 0.7 x VDD 0.2 x VDD VDD - 0.2 1.4 0.2 0.3 5.0 10 10 20 20 mA V Typ. M ax. Units
LO W Level O utput Voltage Input Leakage Current 3- State O utput Leakage
Power- O FF Leakage Current 0V (V1,V0) 3.6V Q uiescent Supply Current
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PI74VCX16245 2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
AC Electrical Characteristics
TA = -40C to +85C, CL = 30pF, RL = 500W Symbol Parame te rs VDD = 3.3V 0.3V VDD = 2.5V 0.2V M in. tPHL, tPLH Prop Delay tPZL, tPZH O utput Enable Time tPLZ, tPHZ O utput Disable Time tOSHL tOSLH
Notes:
VDD = 1.8V M in. 1.5 1.5 1.5 M ax. 5.7 7.5 5.5 0.5
Units
M ax. 2.5 3.8 3.7 0.5
M in. 1.0 1.0 1.0
M ax. 3.2 4.9 4.2 0.5
0.8 0.8 0.8
ns
O utput to O utput Skew(2)
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 VOLP Parame te rs Q uiet O utput Dynamic Peak VOL Q uiet O utput Dynamic Valley VOL Q uiet O utput Dynamic Valley VOH Conditions CL = 30pF VIH = VDD VIL = 0V CL = 30pF VIH = VDD VIL = 0V CL = 30pF VIH = VDD VIL = 0V VDD 1.8 2.5 3.3 1.8 2.5 3.3 1.8 2.5 3.3 TA = +25C Typical 0.25 0.6 0.8 - 0.25 - 0.6 - 0.8 1.5 1.9 2.2 V Units
VOLV
VOHV
Capacitance
Symbols CIN COUT CPD Parame te rs Input Capacitance Output Capacitance Power Dissipation Capacitance Conditions VDD = 1.8, 2.5V or 3.3V, VI = 0V or VDD VI = 0V or VDD, VDD = 1.8V, 2.5V or 3.3V VI = 0V or VDD, F = 10 MHz VDD = 1.8V, 2.5V or 3.3V TA = +25C Typical 6 7 20 pF Units
6
PS8325
09/14/98
PI74VCX16245 2.5V 16-Bit Bidirectional Transceiver with 3-State Outputs
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Test Circuits and Switching Waveforms
Parameter Measurement Information (VDD = 1.8V - 3.6V)
2 x VDD R1 500 Open 30pF CL
(See Note A)
Switch Position
Te s t tPD tPLZ/tPZL tPHZ/tPZH Open 2 x VDD GND S1
From Output Under Test
RL 500
GND
Pulse Width
VDD Low-High-Low Pulse VDD/2 0V tW VDD High-Low-High Pulse VDD/2 0V
Setup, Hold, and Release Timing
VDD VDD/2 0V VDD VDD/2 0V
Input tPLH
Data Input tSU Timing Input tH
Propagaton Delay
VDD VDD/2 tPHL 0V VDD Output tPHL Opposite Phase Input Transition tPLH VDD VDD/2 0V VDD/2 VOL
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 = 50, 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.
Enable Disable Timing
VDD Output Control
(Active LOW)
VDD/2 tPZL VDD VDD/2 +0.15V tPZH VDD/2 0V tPHZ -0.15V VOH VOL tPLZ 0V VDD
Output Waveform 1 S1 at 2xVDD
(see Note B)
Output Waveform 2 S1 at GND
(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
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PS8325 09/14/98

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