PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI74LPT16952 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Fast CMOS 3.3V 16-Bit Registered Transceivers 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 PI74LPT16952 is a 16-bit registered transceivers organized with two sets of eight D-type latches with separate input and output controls for each set. For data flow from A to B, for example, the Ato-B Enable (xCEAB) input must be LOW to enter data from xAx. The data present on the A port will be clocked on the B register when xCLKAB toggles from LOW-to-HIGH. The xOEAB control performs the output enable function on the B port. Control of data from B to A is similar, but uses the xCEAB, xCLKAB, and xOEAB inputs. By connecting the control pins of the two independent transceivers together, a full 16-bit operation can be achieved. The output buffers are designed with a Power-Off disable allowing “live insertion” of boards when used as backplane drivers. The PI74LPT16952 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 1OEBA 2OEBA 1CEBA 2CEBA 9 10 1CLKBA 2CLKBA 1OEAB 2OEAB 1CEAB 2CEAB 1CLKAB 2CLKAB 11 12 C 13 C 1A0 2A0 D 1B0 D C 2B0 14 C D D 15 TO 7 OTHER CHANNELS TO 7 OTHER CHANNELS 1 PS2076A 02/4/97 PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Product Pin Description Pin Name xOEAB xOEBA xCEAB xCEBA xCLKAB xCLKBA xAx xBx GND VCC Truth Table(1,2) Description A-to-B Output Enable Input (Active LOW) B-to-A Output Enable Input (Active LOW) A-to-B Clock Enable Input (Active LOW) B-to-A Clock Enable Input (Active LOW) A-to-B Clock Input B-to-A Clock Input A-to-B Data Inputs or B-to-A 3-State Outputs B-to-A Data Inputs or B-to-A 3-State Outputs Ground Power Inputs 1 2 3 4 56 55 54 1OEBA 53 52 51 50 GND 49 48 47 46 1 B2 45 13 44 14 56-PIN 43 15 V56 42 16 A56 41 17 40 1 B5 18 19 20 21 22 39 38 37 36 GND 2A7 35 34 33 VCC 23 24 GND 25 32 GND 2CEAB 26 27 28 31 30 29 2CEBA 1OEAB 1CEAB GND 1A0 1A1 VCC 1A2 1A3 1A4 GND 1A5 1A6 1A7 2A0 2A1 2A2 GND 2A3 2A4 2A5 VCC 2A6 2CLKAB 2OEAB 5 6 7 8 9 10 11 12 XCLKAB XOEAB XAX H X X L L L X X Outputs XBX B(3) B(3) L ↑ L L L L X ↑ X L H H X H High Z Notes: 1. H = High Voltage Level L = Low Voltage Level X = Don't Care or Irrelevant ↑ = LOW-to-HIGH Transition Z = High Impedance 2. A-to-B data flow shown. B-to-A flow control is the same, except using xCEBA, xCLKBA, and xOEBA. 3. Level of B before the indicated steady-state input conditions were established. Product Pin Configuration 1CLKAB XCEAB 1CLKBA 1CEBA 1 B0 1 B1 VCC 1 B3 1 B4 GND 1 B6 1 B7 2 B0 2 B1 2 B2 2 B3 2 B4 2 B5 2 B6 2 B7 2CLKBA 2OEBA 2 PS2076A 02/4/97 PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS 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. DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 2.7V to 3.6V) Parameters 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 — — — — — — –70 –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 V V V V mA µA mV 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 — (3) VCC = Max. , 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, +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. 3 PS2076A 02/4/97 PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS 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 PS2076A 02/4/97 PI74LPT16952 3.3V 16-BIT REGISTERED TRANSCEIVERS 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 Switching Characteristics over Operating Range(1) LPT16952A Com. Parameters tPLH tPHL tPZH tPZL tPHZ tPLZ tSU tH tSU tH tW tSK(o) Description Propagation Delay XCLKAB, XCLKBA to XBX, XAX Output Enable Time XOEBA, XOEAB to XAX, XBX Output Disable Time(4) XOEBA, XOEAB to XAX, XBX Set-up Time HIGH or LOW xAx, xBx to xCLKAB, xCLKBA Hold Time HIGH or LOW xAx, xBx to xCLKAB, xCLKBA Setup Time HIGH or LOW xCEAB, xCEBA to xCLKAB, xCLKBA Hold Time HIGH or LOW xCEAB, xCEBA to xCLKAB, xCLKBA Pulse Width HIGH(4) or LOW, xCLKAB or xCLKBA Output Skew(5) Conditions(2) CL = 50 pF RL = 500Ω LPT16952B Com. 1 LPT16952C Com. Min.(3) Max. Min.(3) Max. Min.(3) Max. Units 2.0 10.0 2.0 7.5 2.0 6.3 ns 1.5 10.5 1.5 8.0 1.5 7.0 ns 1.5 10.0 1.5 7.5 1.5 6.5 ns 2.5 — 2.5 — 2.5 — ns 2.0 — 2.0 — 2.0 — ns 3.0 — 3.0 — 3.0 — ns 2 3 4 5 2.0 — 2.0 — 2.0 — ns 3.0 — 3.0 — 3.0 — ns — 0.5 — 0.5 — 0.5 ns 6 7 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 wave forms. 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. 8 9 10 Capacitance (TA = 25°C, f = 1 MHz) Parameters(1) CIN COUT Description Test Conditions Input Capacitance Output Capacitance VIN = 0V VOUT = 0V Typ. Max. Units 11 4.5 5.5 6 8 pF pF 12 Note: 1. This parameter is determined by device characterization but is not production tested. 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 PS2076A 02/4/97