PI74LPT16827 3.3V 20-BIT BUFFERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI74LPT16827 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS 3.3V 20-Bit Buffers 1 2 Product Features Product Description • Compatible with LCX™ and LVT™ 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 • Industrial operating temperature range: –40°C to +85°C • Multiple center pins and distributed Vcc/GND pins minimize switching noise • Packages available: – 56-pin 240 mil wide plastic TSSOP (A) – 56-pin 300 mil wide plastic SSOP (V) 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 PI74LPT16827 is a 20-bit wide bus driver designed to provide buffering and high-performance bus interfacing for wide data/ address paths or busses with parity. Two pairs of nanded output enable controls allow the device to be operated as two 10-bit buffers or as one 20-bit buffer. Signal pins are arranged in a flow-through organization for ease of layout and hysteresis is designed into all inputs to improve noise margin. The PI74LPT16827 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. 3 4 5 6 7 8 Logic Block Diagram 1OE1 2OE1 1OE2 2OE2 10 2 Y1 2A1 1 Y1 1A1 9 11 To 9 other channels To 9 other channels 12 13 14 15 1 PS2075A 01/16/97 PI74LPT16827 3.3V 20-BIT BUFFERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Product Pin Configuration Product Pin Description 1OE1 1 56 1OE2 1Y1 55 54 1A1 1Y2 2 3 GND 1Y3 4 5 53 52 GND 1A3 1Y4 6 7 51 50 1A4 8 9 49 48 10 11 56-Pin 12 V-56 13 A56 14 15 16 17 18 19 20 47 46 45 44 43 42 41 40 39 38 37 21 22 23 24 25 26 27 28 36 35 34 33 32 VCC 1Y5 1Y6 1Y7 GND 1Y8 1Y9 1Y10 2Y1 2Y2 2Y3 GND 2Y4 2Y5 2Y6 VCC 2Y7 2Y8 GND 2Y9 2Y10 2OE1 31 30 29 Pin Name xOEx xAx xYx 1A2 VCC 1A5 1A6 Description Output Enable Inputs (Active LOW) Data Inputs 3-State Outputs Truth Table(1) Inputs 1A7 GND 1A8 1A9 1A10 2A1 2A2 2A3 GND 2A4 2A5 1. Outputs xOE1 xOE2 xAx xYx L L H X L L X H L H X X L H Z Z H = High Voltage Level L = Low Voltage Level X = Don't Care Z = High Impedance 2A6 VCC 2A7 2A8 GND 2A9 2A10 2OE2 Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) CIN COUT Description Test Conditions Typ Max. Units Input Capacitance Output Capacitance VIN = 0V VOUT = 0V 4.5 5.5 6 8 pF pF Note: 1. This parameter is determined by device characterization but is not production tested. 2 PS2075A 01/16/97 PI74LPT16827 3.3V 20-BIT BUFFERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Maximum Ratings (Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................ –55°C to +125°C Ambient Temperature with Power Applied ........................... –40°C to +85°C 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. VIH IOZH IOZL VIK IODH IODL VOH 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 VOL Output LOW Voltage IOS IOFF VH Short Circuit Current(4) Power Down Disable Input Hysteresis VIL IIH IIL Test Conditions(1) Description Guaranteed Logic HIGH Level Guaranteed Logic LOW Level Min. Typ(2) Max. Units 2.2 2.0 –0.5 — — — 5.5 5.5 0.8 V V V — — — — — — –0.7 –60 90 — 3.0 3.0 — — 0.2 0.3 –85 — 150 ±1 ±1 ±1 ±1 ±1 ±1 –1.2 –110 200 — — — — 0.2 0.4 0.5 –240 ±100 — µA µA µA µA µA µA V mA mA V V V 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 — — 2 3 4 DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V) Parameters 1 V V V mA µA mV 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, +25°C 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. 5 6 7 8 9 10 11 12 13 14 15 3 PS2075A 01/16/97 PI74LPT16827 3.3V 20-BIT BUFFERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Power Supply Characteristics Parameters Description Test Conditions(1) Min. Typ(2) Max. Units ICC Quiescent Power Supply Current VCC = Max. VIN = GND or VCC 0.1 10 µA ∆ICC Quiescent Power Supply Current TTL Inputs HIGH VCC = Max. VIN = VCC – 0.6V(3) 2.0 30 µA ICCD Dynamic Power Supply(4) VCC = Max., Outputs Open XOE = GND One Bit Toggling 50% Duty Cycle VIN = VCC VIN = GND 50 75 µA/ MHz IC Total Power Supply Current(6) VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle XOE = GND One Bit Toggling VIN = VCC – 0.6V VIN = GND 0.6 2.3 mA VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle XOE = GND 16 Bits Toggling 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, +25°C 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. 4 PS2075A 01/16/97 PI74LPT16827 3.3V 20-BIT BUFFERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 1 Switching Characteristics over Operating Range(1) LPT16827A Com. Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ tSK(o) LPT16827B Com. LPT16827C Com. Description Conditions(2) Min.(3) Max. Min.(3) Max. Min.(3) Max. Units Propagation Delay DN to YN CL = 50 pF RL = 500 Ω CL = 300 pF(4) RL = 500 Ω CL = 50 pF RL = 500 Ω CL = 300 pF(4) RL = 500 Ω CL = 50 pF(4) RL = 500 Ω CL = 50 pF RL = 500 Ω 1.5 6.5 1.5 5.0 1.5 4.4 ns 1.5 15.0 1.5 13.0 1.5 10.0 ns 1.5 9.5 1.5 8.0 1.5 7.0 ns 1.5 23.0 1.5 15.0 1.5 14.0 ns 1.5 8.5 1.5 6.0 1.5 5.7 ns 1.5 10.0 1.5 7.0 1.5 6.0 ns — 0.5 — 0.5 — 0.5 ns Output Enable Time OEN to YN Output Disable Time OEN to YN Output Skew(5) (4) 2 3 4 5 6 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. 7 8 9 10 11 12 13 14 15 Pericom Semiconductor Corporation 2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com 5 PS2075A 01/16/97