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PI74VCX16244
16-Bit Buffer/Driver with 3-State Outputs
Features
* The PI74VCX Family is designed for low voltage operation, CD = 1.8V to 3.6V * 3.6V Tolerant Inputs and Outputs * Supports Live Insertion * Balanced 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 * Packaging (Pb-free & Green available): - 48-pin 240-mil wide plastic TSSOP (A)
Description
Pericom Semiconductor's PI74VCX16244 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 true 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; the minimum value of the resistor is determined by the current-sinking capability of the driver. The PI74VCX family is I/O Tolerant, allowing it to operate in 1.8/3.6V systems.
Block Diagram
1OE
1
3OE
25
1A1
47
2
1Y1
3A1
36
13
3Y1
1A2
46
3
1Y2
3A2
35
14
3Y2
1A3
44
5
1Y3
3A3
33
16
3Y3
1A4
43
6
1Y4
3A4
32
17
3Y4
2OE
48
4OE
24
2A1
41
8
2Y1
4A1
30
19
4Y1
40
2A2
9
29
2Y2 4A2
20
4Y2
2A3
38
11
27
2Y3 4A3
22
4Y3
2A4
37
12
26
2Y4 4A4
23
4Y4
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PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
Pin Description
Pin Name nOE nAx nYx GND VCC Description 3-State Output Enable Inputs (Active LOW) Inputs 3-State Outputs Ground Power
Truth Table(1)
Inputs nOE L L H nAX H L X Outputs nYx H L Z
Pin Configuration
Notes: 1. H = High Signal Level L = Low Signal Level X = Don't Care or Irrelevant Z = High Impedance
1OE 1Y1 1Y2
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
2OE 1A1 1A2
GND
1Y3 1Y4
GND
1A3 1A4
VCC
2Y1 2Y2
VCC
2A1 2A2
GND
2Y3 2Y4 3Y1 3Y2
GND
2A3 2A4 3A1 3A2
GND
3Y3 3Y4
GND
3A3 3A4
VCC
4Y1 4Y2
VCC
4A1 4A2
GND
4Y3 4Y4 4OE
GND
4A3 4A4 3OE
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PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
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 VCC+0.5 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 to 150C 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.
Recommended Operating Conditions(2)
M in. VDD VIH VIL VI VO Supply voltage High- level input voltage Low- level input 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 Operating Data Retention Only VDD = 2.7V to 3.6V VDD = 2.7V to 3.6V - 0.3 0 0 1.8 1.2 2.0 0.8 3.6 VDD 3.6 24 18 6 10 85 mA ns/V C V M a x. 3.6 3.6 Units
IO t/v TA
Output current in IOH/IOL 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.
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PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted)
DC Characteristics (2.7VParame te r VIH VIL HIGH Level Input Voltage LOW Level Input Voltage IOH = -100A VOH HIGH Level Output Voltage IOH = -12mA IOH = -18mA IOH = -24mA IOL = 100A VOL LOW Level Output Voltage IOL = 12mA IOL = 18mA IOL = 24mA II IOZ IOFF IDD IDD Input Leakage Current 3- STATE Output Leakage Power- OFF Leakage Current Quiescent Supply Current Increase in IDD per input VI = 0.0V, 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 3.0 2.7 - 3.6 2.7 3.0 3.6 2.7 - 3.6 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 A V Conditions VDD M in. 2.0 0.8 Typ. M ax. Units
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PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
Electrical Characteristics over Recommended Operating Free-Air Temperature Range
(unless otherwise noted) (continued from previous page)
DC Characteristics (2.3V VDD 2.7V)
Parame te rs VIH VIL HIGH Level Input Voltage LOW Level Input Voltage IOH = - 100A VOH HIGH Level Output Voltage IOH = - 6mA IOH = - 12mA IOH = - 18mA IOL = 100A VOL LOW Level Output Voltage IOL = 12mA IOL = 18mA II IOZ IOFF IDD Input Leakage Current 3- STATE Output Leakage Power- OFF Leakage Current Quiescent Supply Current VI = 0.0V, VI = 2.7V 0 VO 3.6V VI = VIH or VIL 0 (VI,VO) 3.6V VI = VDD or GND VDD (VI,VO) 3.6V 2.3 - 2.7 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 A V Conditions VDD M in. 1.6 0.7 Typ. M ax. Units
DC Characteristics (1.8V VDD 2.3V)
Parame te rs VIH VIL VOH HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage IOH = - 100 A IOH = - 6 mA VOL LOW Level Output Voltage IOL = 100 A IOL = 6 mA II IOZ IOFF IDD Input Leakage Current 3- STATE Output Leakage VI = 0.0V, VI = 1.8V 0 VO 3.6V VI = VIH or VIL 0 1.8 1.8 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 A V Typ. M a x. Units
Power- OFF Leakage Current 0 (VI,VO) 3.6V Quiescent Supply Current VI = VDD or GND VDD (VI,VO) 3.6V
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Dynamic Switching Characteristics
Symbol Parame te r Conditions 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
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
AC Electrical Characteristics(1)
TA = -40C to +85C, CL = 30pF, RL = 500 Symbol Parame te r VDD = 3.3V 0.3V M in. tPHL, tPLH tPZL, tPZH tPLZ, tPHZ tOSHL tOSLH Prop Delay Output Enable Time Output Disable Time Output to Output Skew(2) 0.8 0.8 0.8 M a x. 2.5 3.5 3.5 0.5 VDD = 2.5V 0.2V M in. 1.0 1.0 1.0 M a x. 3.0 4.1 3.8 0.5 VDD = 1.8V M in. 1.5 1.5 1.5 M a x. 5.0 6.5 5.0 0.5 ns Units
Notes 1. For CL = 50pF add approximatly 300ps to AC maximum 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).
VOLP
Quiet Output Dynamic Peak VOL
CL = 50pF, VIH= VDD, VIL= 0V
VOLV
Quiet Output Dynamic Valley VOL
CL = 50pF, VIH= VDD, VIL= 0V
VOHV
Quiet Output Dynamic Valley VOH
CL = 50pF, VIH= VDD, VIL= 0V
Capacitance
Symbol
CIN COUT
Parame te r
Input Capacitance Output Capacitance
Conditions
VDD = 1.8V, 2.5V or 3.3V, V1 = 0V or VDD V1 = 0V or VDD, VDD = 1.8V, 2.5V or 3.3V V1 = 0V or VDD, F = 10MHz VDD = 1.8V, 2.5V or 3.3V
TA = +25C Typical
6 7
Units
pF
CPD
Power Dissipation Capacitance
20
6
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09/27/04
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PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
Test Circuits and Switching Waveforms
Parameter Measurement Information (VDD = 1.8V - 3.6V)
2 x VDD R1 500 Open 50pF 3 CL
(See Note A)
Switch Position
Te s t tpd tPLZ/tPZL tPHZ/tPZH S1 Open 2 x VDD GND
From Output Under Test
RL 500
GND
Pulse Width
VDD Low-High-Low Pulse tW VDD High-Low-High Pulse VDD/2 0V VDD/2 0V
Setup, Hold, and Release Timing
Data Input tSU Timing Input tH VDD VDD/2 0V VDD VDD/2 0V
Propagaton Delay
Input tPLH Output tPHL tPLH tPHL
VDD VDD/2 0V VDD VDD/2 VOL 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 following 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.
Opposite Phase Input Transition
VDD/2 0V
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)
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PS8160C
09/27/04
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PI74VCX16244 16-Bit Buffer/Driver with 3-State Outputs
Packaging Mechanical: 48-pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.488 12.4 .496 12.6 .047 1.20 Max SEATING PLANE
.004 0.09 .008 0.20 0.45 .018 0.75 .030 .319 BSC 8.1
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010 0.17 0.27
.002 .006 0.05 0.15
Ordering Information
Ordering Code PI74VCX16244A PI74VCX16244AE Package Code A A Package Description 48-pin TSSOP Pb-free & Green, 48-pin TSSOP
Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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PS8160C 09/27/04

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