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To Seven Other Channels 2CLKENAB 2CLKAB 2OEBA 26 27 29 31 30 28 2CLKENBA 2CLKBA 2OEAB
One of Eight Channels 2A1 15
V
To Seven Other Channels
V
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PI74ALVCH16952
16-Bit Registered Transceiver With 3-STATE Outputs
Product Features
* * * * * * * * PI74ALVCH16952 is designed for low voltage operation VCC = 2.3V to 3.6V Hysteresis on all inputs Typical VOLP (Output Ground Bounce) < 0.8V at VCC = 3.3V, TA = 25C Typical VOHV (Output VOH Undershoot) < 2.0V at VCC = 3.3V, TA = 25C Bus Hold retains last active bus state during 3-STATE eliminating the need for external pullup resistors 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 PI74ALVCH series of logic circuits are produced using the Companys advanced 0.5 micron CMOS technology, achieving industry leading speed. The PI74ALVCH16952 16-bit registered transceiver is designed for 2.3V to 3.6V VCC operation. The product contains two sets of D-type flip-flops for temporary storage of data flowing in either direction. The device can be used as two 8-bit transceivers or one 16-bit tranceiver. Data on the A or B bus is stored in the registers on the low-to-high transition of the clock (CLKAB or CLKBA) input provided that the clock-enable (CLKENAB or CLKENBA) input is low. Taking the output-enable (OEAB or OEBA) input low accesses the data on either port. 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 capability of the driver. The PI74ALVCH16952 has Bus Hold which retains the data inputs last state whenever the data input goes to high-impedance preventing floating inputs and eliminating the need for pullup/ down resistors.
3 2 56 54 55 1 1CLKENBA 1CLKBA 1OEAB
Logic Block Diagram
1CLKENAB 1CLKAB 1OEBA
One of Eight Channels 1A1 5
C1 CE 1D C1 CE 1D
C1 CE 1D C1 CE 1D
V
52 1B1 42 2B1
PS8197A 10/16/00
V
1
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PI74ALVCH16952 16-Bit Registered Transceiver
Product Pin Description
Pin Name CLKEN OE CLK Ax Bx GND VCC Description Clock Enable Input (Active LOW) Output Enable Input (Active LOW) Clock Input (Active HIGH) Data I/O Data I/O Ground Power
Truth Table(1)
Inputs CLKENAB CLKAB H X L L X X L X OEAB L L L L H A X X L H X Output B B0 B0 L H Z
Product Pin Configuration
1OEBA CLKBA 1CLKENBA GND 1B1 1B2 VCC 1B3 1B4 1B5 GND 1B6 1B7 1B8 2B1 2B2 2B3 GND 2B4 2B5 2B6 VCC 2B7 2B8 GND 2CLKENBA 2CLKBA 2OEAB
1OEAB 1CLKAB 1CLKENAB GND 1A1 1A2 VCC 1A3 1A4 1A5 GND 1A5 1A7 1A8 2A1 2A2 2A3 GND 2A4 2A5 2A6 VCC 2A7 2A8 GND 2CLKENAB 2CLKAB 2OEAB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
56 55 54 53 52
56-PIN 51 A-56 50 V-56
49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29
Note: 1. H = High Signal Level L = Low Signal Level Z = High Impedance = LOW-to-HIGH Transition A-to-B data flow is shown: B-to-A flow is similar but uses OEBA, CLKBA, and CLKENBA. Output level of B before the indicated steady-state input conditions were established.
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PS8197A
10/16/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCH16952 16-Bit Registered Transceiver
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ........................................................... 65C to +150C Ambient Temperature with Power Applied ........................ 40C to +85C Input Voltage Range, VIN ...................................................... 0.5V to VCC +0.5V Output Voltage Range, VOUT ............................................... 0.5V to VCC +0.5V DC Input Voltage .................................................................... 0.5V to +5.0V DC Output Current ............................................................................. 100mA Power Dissipation .................................................................................. 1.0W
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(1)
Parame te rs VCC VIH VIL VIN VOUT IOH De s cription Supply Voltage Input HIGH Voltage VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V 0 0 VCC = 2.3V High- level Output Current VCC = 2.7V VCC = 3.0V VCC = 2.3V IOL TA Low- level Output Current VCC = 2.7V VCC = 3.0V Operating Free- Air Temperature - 40 Te s t Conditions M in. 2.3 1.7 2.0 0.7 0.8 VCC VCC - 12 - 12 - 24 12 12 24 85 C mA V Typ. M ax. 3.6 Units
Input LOW Voltage Input Voltage Output Voltage
Note: 1. Unused control inputs must be held HIGH or LOW to prevent them from floating.
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PS8197A
10/16/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCH16952 16-Bit Registered Transceiver
DC Electrical Characteristics (Over the Operating Range, TA = 40C to +85C, VCC = 3.3V 10%)
Parame te rs IOH = - 100 A IOH = - 6 MA VOH IOH = - 12 mA VIH = 1.7V VIH = 1.7V VIH = 2.0V VIH = 2.0V IOH = - 24 mA IOL = 100 A IOL = 6 mA VOL IOL = 12 mA IOL = 24 mA II VI = VCC or GND VI = 0.7V VI = 1.7V II (Hold)(3) VI = 0.8V VI = 2.0V VI = 0 to 3.6V IOZ(4) ICC ICC VO = VCC or GND VI = VCC or GND IO = 0 One input at VCC - 0.6V, Other inputs at VCC or GND VIL = 0.7V VIL = 0.7V VIL = 0.8V VIL = 0.8V VIH = 2.0V Te s t Conditions VCC(1) Min. to Max. 2.3V 2.3V 2.7V 3.0V 3.0V Min. to Max. 2.3V 2.3V 2.7V 3.0V 3.6V 2.3V 45 - 45 75 - 75 500 10 40 750 3.5 8.5 pF A M in. VCC - 0.2 2.0 1.7 2.2 2.4 2.0 0.2 0.4 0.7 0.4 0.55 5 V Typ.(2) M ax. Units
3.0V 3.6V 3.6V 3.6V 3V to 3.6V 3.3V 3.3V
CI Control Inputs VI = VCC or GND CIO A or B ports VO = VCC or GND
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, +25C ambient and maximum loading. 3. Bus Hold maximum dynamic current required to switch the input from one state to another. 4. For I/O ports, the IOZ includes the input leakage current.
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PS8197A
10/16/00
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74ALVCH16952 16-Bit Registered Transceiver
Timing Requirements over Operating Range
Parame te rs fCLOCK tW Pulse Duration tSU Setup time tH Hold time t/v(1) D e s cription Clock frequency CLK EN high CLK high or low Data before CLK CLK EN before CLK Data after CL CLK EN after CLK Input Transition Rise or Fall VCC = 2.5V 0.2V M in. 0 3.3 3.3 1.7 1.2 0.6 1.1 0 10 M ax. 150 VCC = 2.7V M in. 0 3.3 3.3 1.9 1.0 0.6 0.9 0 10 M ax. 150 VCC = 3.3V 0.3V M in. 0 3.3 3.3 1.5 1.0 0.8 1.1 0 10 ns/V ns M ax. 150 Units MHz
Notes: 1. See test circuit and waveforms.
Switching Characteristics Over Operating Range(1)
Parame te rs fMAX tPD tEN tDIS CLK O EBA or O EAB O EBA or O EAB A or B 1.0 From (Input) To (Output) VCC = 2.5V 0.2V M in.(2) 150 4.1 5.4 5.3 M ax. VCC = 2.7V M in.(2) 150 4.6 5.3 4.4 M ax. VCC = 3.3V 0.V M in.(2) 150 1.0 1.0 1.1 3.9 4.4 4.0 ns M ax. Units MHz
Notes: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays.
Operating Characteristics, TA = 25C
Parame te r CPD Power Dissipation Capacitance Outputs Enabled Outputs Disabled Te s t Conditions CL = 50pF f = 10 MHz VCC = 2.5V 0.2V VCC = 3.3V 0.3V Typical 53 34 71 40 Units
pF
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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PS8197A 10/16/00

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