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Logic Block Diagram
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PI74LPT16374 3.3V 16-BIT REGISTER (3-STATE)
PI74LPT16374
Fast CMOS 3.3V 16-Bit Register (3-State)
Product Features
* Compatible with LCXTM and LVTTM families of products * Supports 5V Tolerant Mixed Signal Mode Operation - Input can be 3V or 5V - Output can be 3V or connected to 5V bus * Advanced Low Power CMOS Operation * Excellent output drive capability: Balanced drives (24 mA sink and source) * Pin compatible with industry standard double-density pinouts * Low ground bounce outputs * Hysteresis on all inputs * ESD Protection exceeds 2000V * Industrial operating temperature range: -40C to +85C * Multiple center pins and distributed Vcc/GND pins minimize switching noise * Packages available: - 48-pin 240 mil wide plastic TSSOP (A) - 48-pin 300 mil wide plastic SSOP (V)
Product Description
Pericom Semiconductor's PI74LPT series of logic circuits are produced in the Company's advanced 0.6 micron CMOS technology, achieving industry leading speed grades. The PI74LPT16374 is a 16-bit octal register designed with 16 D-type flip-flops with a buffered common clock and 3-state outputs. The Output Enable (xOE) and clock (xCLK) controls are organized to operate as two 8-bit registers or one 16-bit register. When OE is HIGH, the outputs are in the high impedance state. Input data meeting the setup and hold time requirements of the D inputs is transferred to the O outputs on the LOW-to-HIGH transition of the clock input. The PI74LPT16374 can be driven from either 3.3V or 5.0V devices allowing this device to be used as a translator in a mixed 3.3/5.0V system.
1OE
2OE
1CLK
2CLK
1D0
D
1O0
2D0
D
2O0
C
C
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
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Product Pin Configuration
1OE 1O0 1O1
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PI74LPT16374 3.3V 16-BIT REGISTER (3-STATE)
Product Pin Description
Pin Name xOE xCLK xDx xOx GND VCC Description 3-State Output Enable Inputs (Active LOW) Clock Inputs Data Inputs 3-State Outputs Ground Power
Truth Table
Function High-Z Load Register Inputs(1) xDx xCLK xOE X L H X H H L L H L L H H H Outputs(1) xOx Z Z L H Z Z
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
1CLK 1D0 1D1
Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance
GND
1O2 1O3
GND
1D2 1D3
VCC
1O4 1O5
VCC
1D4 1D5
GND
1O6 1O7 2O0 2O1
GND
1D6 1D7 2D0 2D1
48-PIN 37 V48 A48 36
35 34 33 32 31 30 29 28 27 26 25
GND
2O2 2O3
GND
2D2 2D3
VCC
2O4 2O5
VCC
2D4 2D5
GND
2O6 2O7 2OE
GND
2D6 2D7 2CLK
Capacitance (TA = 25C, f = 1 MHz)
Parameters(1) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ. 4.5 5.5 Max. 6 8 Units pF pF
Note: 1. This parameter is determined by device characterization but is not production tested.
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PI74LPT16374 3.3V 16-BIT REGISTER (3-STATE)
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .............................................................. -55C to +125C Ambient Temperature with Power Applied ............................. -40C to +85C Supply Voltage to Ground Potential (Inputs & Vcc Only) ....... -0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ... -0.5V to +7.0V DC Input Voltage ..................................................................... -0.5V to +7.0V DC Output Current ............................................................................... 120 mA 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.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 2.7V to 3.6V)
Parameters VIH VIL IIH IIL IOZH IOZL VIK IODH IODL VOH Description Input HIGH Voltage (Input pins) Input HIGH Voltage (I/O pins) Input LOW Voltage (Input and I/O pins) Input HIGH Current (Input pins) Input HIGH Current (I/O pins) Input LOW Current (Input pins) Input LOW Current (I/O pins) High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Output HIGH Current Output LOW Current Output HIGH Voltage Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level Min. 2.2 2.0 -0.5 Typ(2) -- -- -- -- -- -- -- -- -- -0.7 -60 90 -- 3.0 3.0 -- -- 0.2 0.3 -85 -- 150 Max. 5.5 5.5 0.8 1 1 1 1 1 1 -1.2 -110 200 -- -- -- -- 0.2 0.4 0.5 -240 100 -- Units V V V A A A A A A V mA mA V V V V V V mA A mV
VOL
Output LOW Voltage
IOS IOFF VH
Short Circuit Current(4) Power Down Disable Input Hysteresis
VCC = Max. VIN = 5.5V -- VCC = Max. VIN = VCC -- VCC = Max. VIN = GND -- VCC = Max. VIN = GND -- VCC = Max. VOUT = 5.5V -- VCC = Max. VOUT = GND -- VCC = Min., IIN = -18 mA -- VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) -36 (3) VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V 50 VCC = Min. IOH = -0.1 mA Vcc-0.2 VIN = VIH or VIL IOH = -3 mA 2.4 VCC = 3.0V, IOH = -8 mA 2.4(5) VIN = VIH or VIL IOH = -24 mA 2.0 VCC = Min. IOL = 0.1 mA -- VIN = VIH or VIL IOL = 16 mA -- IOL = 24 mA -- VCC = Max.(3), VOUT = GND -60 VCC = 0V, VIN or VOUT 4.5V -- --
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. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not tested. 5. VOH = VCC - 0.6V at rated current.
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PI74LPT16374 3.3V 16-BIT REGISTER (3-STATE)
Power Supply Characteristics
Parameters Description ICC ICC ICCD Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply(4) Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., Outputs Open XOE = GND One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle XOE = GND One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle XOE = GND 16 Bits Toggling VIN = GND or VCC VIN = VCC - 0.6V(3) VIN = VCC VIN = GND Min. Typ(2) 0.1 2.0 50 Max. 10 30 75 Units A A A/ MHz
IC
Total Power Supply Current(6)
VIN = VCC - 0.6V VIN = GND
0.6
2.3
mA
VIN = VCC - 0.6V VIN = GND
2.1
4.7(5)
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at Vcc = 3.3V, +25C ambient. 3. Per TTL driven input; all other inputs at Vcc or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested. 6. IC =IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ICC = Power Supply Current for a TTL High Input DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
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PS2070A 01/16/97
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PI74LPT16374 3.3V 16-BIT REGISTER (3-STATE)
Switching Characteristics over Operating Range(1)
LPT16374 Com. Parameters
tPLH
LPT16374A Com. Min. 2.0 1.5 1.5 2.0 1.5 5.0
(3)
LPT16374C Com. Min. 2.0 1.5 1.5 2.0 1.5 5.0
(3)
Description Propagation Delay xCLK to xOx Output Enable Time xOE to xOx Output Disable Time(4) xOE to xOx Setup Time HIGH or LOW, xDx to xCLK Hold Time HIGH or LOW, xDx to xCLK xCLK Pulse Width(4) HIGH Output Skew(5)
Conditions CL = 50 pF RL = 500
(2)
Min. 2.0 1.5 1.5 2.0 1.5 7.0
(3)
Max. 7.0 7.2 7.2
Max. 6.5 6.5 5.5
Max. 5.2 5.5 5.0
Units ns ns ns ns ns ns
tPHL tPZH tPZL tPHZ tPLZ tSU tH tW tSK(o)
0.5
0.5
0.5
ns
Notes: 1. Propagation Delays and Enable/Disable times are with Vcc = 3.3V 0.3V, normal range. For Vcc = 2.7V, extended range, all Propagation Delays and Enable/Disable times should be degraded by 20%. 2. See test circuit and waveforms. 3. Minimum limits are guaranteed but not tested on Propagation Delays. 4. This parameter is guaranteed but not production tested. 5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
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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PS2070A 01/16/97

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