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PI74AUC16244
1.8V 16-Bit Buffer/Driver with 3-State Outputs
Features
* PI74AUC16244 is designed for low-voltage operation, VCC = 0.8V to 2.7V, optimized at 1.8V. * 3.6V I/O Tolerant inputs and outputs * IOFF supports partial power-down operation * Latch-Up Performance exceeds 100mA per JESD 78 * ESD Protection Exceeds JESD 22 - 2000V Human-Body Model (A114-B) - 200V Machine Model (A115-A) * Industrial operation: -40C to +85C * Packaging: - 48-pin TSSOP (A) - 48-pin TSSOP (K)
Description
Pericom Semiconductor's PI74AUC series of logic circuits are produced using the Company's advanced submicron CMOS technology, achieving industry leading speeds. The PI74AUC16244 is a 16-bit buffer driver 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 non-inverting 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 pull-up resistor; the minimum value of the resistor is determined by the current-sinking ability of the driver. The PI74AUC16244 is specified for partial power down applications using IOFF. The IOFF circuitry disables the outputs preventing current backflow through the device when it is powered down.
Block Diagram
1OE 1A1 1A2 1A3 1A4
1 47 46 44 43 48 41 40 38 37 8 9
2Y0 2Y1
3OE
25 36 35 33 32 24 30 29 27 26 19 Y 41 20
4Y2
2 3
1 Y1 1 Y2
3A1 3A2 3A3 3A4
13 Y 31 14
3Y2
5Y 13 6
1 Y4
16 3Y3 17 Y 34
2OE 2A1 2A2 2A3 2A4
4OE 4A1 4A2 4A3 4A4
11 2Y2 12
2Y3
22 4Y3 23
4Y4
A
PS8731
08/16/04
PI74AUC16244 1.8V 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, VCC .................................. -0.5V to +3.6V Input voltage range, VI(1) ..................................... -0.5V to +3.6V Voltage range applied to any output in the high-impedance or power-off state, VO(1) .... -0.5V to +3.6V Output voltage range VO(1, 2) ............... -0.5V to VCC +0.5V Input clamp current, IIK (VI < 0) .................................. -50mA Output clamp current, IOK (VO < 0) ............................. -50mA Continuous output current, IO .................................... 20mA Continuous current through each VCC or GND ......... 100mA Package thermal impedance, JA(3): package A........ 104C/W package K........ 107C/W Storage Temperature range, Tstg ....................-65C to 150C
Notes: 1. Input negative voltage & output voltage ratings may be exceeded if the input and output current rating are observed. 2. This value is limited to 3.6V maximium. 3. The package thermal impedance is calculated in accordance with JESD 51. 4. 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.
Pin Configuration

Pin Description
Pin Name

Description 3-State Output Enable Inputs (Active LOW) Inputs 3-State Outputs Ground Power

XOE XAX XYX

GND VCC

Truth Table
Inputs
XOE XAX

Outputs
XYX
L L H
H L X
H L

Note: 1. H = High Signal Level, L = Low Signal Level X = Don't Care or Irrelevant, Z = High Impedance

2
PS8731
08/16/04
PI74AUC16244 1.8V 16-Bit Buffer Driver with 3-State Outputs Recommended Operating Conditions(1)
Parameters VCC VIH Description SupplyVoltage VCC = 0.8V High-Level Input Voltage VCC = 1.1V to 1.95V VCC = 2.3V to 2.7V VCC = 0.8V VIL VI VO Low-Level Input Voltage Input Voltage Output Voltage Active State 3-state VCC = 0.8V VCC = 1.1V IOH High-Level Output Current VCC = 1.4V VCC = 1.65V VCC = 2.3V VCC = 0.8V VCC = 1.1V IOL Low-Level Output Current VCC = 1.4V VCC = 1.65V VCC = 2.3V t/v TA Input Transition Rise or Fall Rate Operating Free-Air Temperature -40 5 85 ns/V C mA VCC = 1.1V to 1.95V VCC = 2.3V to 2.7V 0 0 0 Operating Conditions Min. 0.8 VCC 0.65 x VCC 1.7 0 0.35 x VCC 0.7 3.6 VCC 3.6 V Max. 2.7 Units
Note: 1. All unused inputs must be held at VCC or GND to ensure proper device operation.
3
PS8731
08/16/04
PI74AUC16244 1.8V 16-Bit Buffer Driver with 3-State Outputs DC Electrical Characteristics (Over the Operating Range, TA = -40C +85C)
Parameters Test Conditions(1) IOH = -100A IOH = -0.7mA VOH IOH = -3mA IOH= -5mA IOH = -8mA IOH = -9mA IOL = 100A IOL = 0.7mA VOL IOL = 3mA IOL = 5mA IOL = 8mA II
(2)
VCC 0.8V to 2.7V 0.8V 1.1V 1.4V 1.65V 2.3V 0.8V to 2.7V 0.8V 1.1V 1.4V 1.65V 2.3V 0 to 2.7V 0V 0.8V to 2.7V 0.8V to 2.7V 2.5V 2.5V
Min. VCC -0.1V
Typ.(1) 0.55
Max.
Units
0.8 1 1.2 1.8 0.2 0.25 0.3 0.4 0.45 0.6 5 10 10 20 3 4 pF A V
IOL = 9mA VI = VCC or GND VI or VO = 2.7V VO = VCC or GND VI = VCC or GND, IO = 0 VI = VCC or GND VO = VCC or GND
IOFF IOZ ICC CI CO
Note: 1. Typical values are measured at TA = 25C. 2. II - A Port or OE inputs.
Switching Characteristics
Parameters tpd ten tdis
(Over recommended operating free-air temperature range, unless otherwise noted, see Figure 1) From To (Input) (Output) A OE OE Y Y Y VCC = 0.8V Typ. 5.4 8 12 VCC = 1.2V 0.1V Min. 0.8 1 1.9 Max. 2.8 4.4 4.9 VCC = 1.5V 0.1V Min. 0.6 0.7 1 Max. 1.9 2.6 4.6 0.7 0.8 1.5 VCC = 1.8V 0.15V Min. Typ. 1.3 1.4 2.6 Max. 1.8 2.5 4 VCC = 2.5V 0.2V Min. 0.5 0.6 0.5 Max. 1.8 1.9 3 ns Units
Operating Characteristics, TA= 25C
Parameters Cpd Power Dissipation Capacitance Outputs Enabled Outputs Disabled Test Conditions CL = 0pF, f = 10 MHz VCC = 0.8V Typical 21 1 VCC = 1.2V Typical 22 1 VCC = 1.5V Typical 23 1 VCC = 1.8V Typical 25 1 VCC = 2.5V Typical 30 pF 1 Units
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PS8731
08/16/04
PI74AUC16244 1.8V 16-Bit Buffer Driver with 3-State Outputs Parameter Measurement Information
RL S1 2xVCC Open GND
Test tPLH/tPHL tPLZ/tPZL tPHZ/tPZH VCC CL 15pF 15pF 15pF 30pF 30pF
tW
S1 Open 2 x VCC GND RL 2k 2k 2k 1k 500 V 0.1V 0.1V 0.1V 0.15V 0.15V
From Output Under Test CL (See Note 1) RL
Load Circuit
Timing Input VCC
VCC/2
0.8V 1.2V 0.1V 1.5V 0.1V 1.8V 0.15V 2.5V 0.2V
0V
tsu Data Input
VCC/2
th
VCC VCC/2 0V
Input
VCC VCC/2 VCC/2 0V
Voltage Waveforms Setup and Hold Times
Voltage Waveforms Pulse Duration
VCC Input VCC/2 tPLH Output Output tPHL VCC /2 VCC /2 tPLH VCC /2 VCC/2 0V tPHL VOH VCC/2 VOL VOH VOL
Output Control (Low Level Enabling)
VCC VCC/2 tPZL VCC/2 VCC/2 tPLZ VCC VOL +V tPHZ VCC/2 VOH -V VOH 0V VOL 0V
Output Waveform 1 S1 at 2 x VCC (see Note 2) t PZH Output Waveform 2 S1 at GND (see Note 2)
Voltage Waveforms Propagation Delay Times
Voltage Waveforms Enable and Disable Times
Figure 1. Load Circuit and Voltage Waveforms
Notes: 1. CL includes probe and jig capacitance. 2. 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. 3. All input pulses are supplied by generators having the following characteristics: PRR 10 MHz, ZO = 50, slew rate 1V/ns 4. The outputs are measured one at a time with one transition per measurement. 5. tPLZ and tPHZ are the same as tdis 6. tPZL and tPZH are the same as ten 7. tPLH and tPHL are the same as tpd 8. All parameters and waveforms are not applicable to all devices.
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PS8731
08/16/04
PI74AUC16244 1.8V 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
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010
0.17 0.27
.002 .006 0.05 0.15
0.45 .018 0.75 .030
.319 BSC 8.1
Packaging Mechanical: 48-pin TSSOP (K)
48
.169 .177
4.30 4.50
.0035 .008
1
.378 9.60 .386 9.80
0.09 0.20
.031 .041 0.80 1.05
0.45 .018 0.75 .030
.252 BSC 6.4
SEATING PLANE
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
.016 BSC 0.40
.0051 .009 0.13 0.23
.002 .006 0.05 0.15
Max. .047 1.20
6
PS8731
08/16/04
PI74AUC16244 1.8V 16-Bit Buffer Driver with 3-State Outputs Ordering Information
Ordering Code PI74AUC16244A PI74AUC16244K Packaging Code A K 48-pin TSSOP 48-pin TVSOP Package Description
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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PS8731 08/16/04

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