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PI74FCT827/828T (25 Series) P174FCT2827/2828T 10-BIT BUFFERS PI74FCT827T, PI74FCT828T
(25 Series) PI74FCT2827T (25 Series) PI74FCT2828T
Fast CMOS 10-Bit Buffers
Product Features
PI74FCT827/828/2827/2828T are pin compatible with bipolar FASTTM Series at a higher speed and lower power consumption 25 series resistor on all outputs (FCT2XXX only) TTL input and output levels Low ground bounce outputs Extremely low static power Hysteresis on all inputs Industrial operating temperature range: -40C to +85C Packages available: - 24-pin 300-mil wide plastic DIP (P) - 24-pin 150-mil wide plastic QSOP (Q) - 24-pin 150-mil wide plastic TQSOP (R) - 24-pin 300-mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor's PI74FCT series of logic circuits are produced in the Company's advanced 0.8 micron CMOS technology, achieving industry leading speed grades. All PI74FCT2XXX devices have a built-in 25-ohm series resistor on all outputs to reduce noise because of reflections, thus eliminating the need for an external terminating resistor. The PI74FCT827/828T and the PI74FCT2827/2828T are 10-bit wide bus drivers providing high-performance bus interface buffering for wide address/data paths or buses carrying parity. The 10-bit buffers have NAND-ed output enables for maximum control flexibility. They are designed for high-capacitance load drive capability, while providing low-capacitance bus loading at both inputs and outputs. The PI74FCT827/2827T is a non-inverting of the PI74FCT828/2828T. Device models available upon request.
Logic Block Diagram
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
NOTE: PI74FCT827 is shown.
OE1 OE2
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PI74FCT827/828T (25 Series) P174FCT2827/2828T 10-BIT BUFFERS
Product Pin Configuration
OE D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 GND 1 2 3 4 5 6 7 8 9 10 11 12
24-PIN P24 Q24 R24 S24
Product Pin Description
24 23 22 21 20 19 18 17 16 15 14 13 Vcc Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 OE2
Pin Name OEN D0-D9 Y0-Y9 GND VCC
Description Output Enable Input (Active LOW) 10-bit Data Inputs 10-bit Data Outputs Ground Power
PI74FCT827/2827T Truth Table (Non-Inverting)(1)
Function Transparent Three-State Inputs OE1 OE2 L L H X L L X H DN L H X X Outputs YN L H Z Z
PI74FCT828/2828T Truth Table (Inverting)(1)
Inputs Outputs
Function Transparent Three-State
OE1 L L H X
OE2 L L X H
DN L H X X
YN H L Z Z
1.
H = High Voltage Level L = Low Voltage Level X = Don't Care Z = High Impedance
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PI74FCT827/828T (25 Series) P174FCT2827/2828T 10-BIT BUFFERS
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 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 .................................................................................... 120mA Power Dissipation ......................................................................................... 0.5W 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 = 5.0V 5%)
Parameters Description VOH VOL VOL VIH VIL IIH IIL IOZH IOZL VIK IOFF IOS VH Output HIGH Voltage Output LOW Current Output LOW Current Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Power Down Disable Short Circuit Current Input Hysteresis VCC = Min., IIN = -18mA VCC = GND, VOUT = 4.5V VCC = Max.(3), VOUT = GND -- -60 Test Conditions(1) VCC = Min., VIN = VIH or VIL VCC = Min., VIN = VIH or VIL VCC = Min., VIN = VIH or VIL Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VCC = Max. VCC = MAX. VIN = VCC VIN = GND VOUT = 2.7V VOUT = 0.5V -0.7 -- -120 200 IOH = -15.0mA IOL = 48mA IOL = 12mA (25 Series) 2.0 0.8 1 -1 1 -1 -1.2 100 Min. Typ(2) Max. Units 2.4 3.0 0.3 0.3 0.50 0.50 V V V V V A A A A V A mA mV
Capacitance (TA = 25C, f = 1 MHz)
Parameters(4) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ 6 8 Max. 10 12 Units pF pF
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 = 5.0V, +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 determined by device characterization but is not production tested.
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PI74FCT827/828T (25 Series) P174FCT2827/2828T 10-BIT BUFFERS
Power Supply Characteristics
Parameters Description ICC ICC ICCD Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) VCC = Max. VCC = Max. VCC = Max., Outputs Open OE1 = OE2 = GND One Input Toggling 50% Duty Cycle VCC = Max., Outputs Open fCP = 10 MHZ 50% Duty Cycle OE1 = OE2 = GND fI = 5 MHZ One Bit Toggling VCC = Max., Outputs Open fCP = 10 MHZ 50% Duty Cycle OE1 = OE2 = GND Eight Bits Toggling fI = 2.5 MHZ 50% Duty Cycle Test Conditions(1) VIN = GND or VCC VIN = 3.4V(3) VIN = VCC VIN = GND Min. Typ(2) 0.1 0.5 0.15 Max. 500 2.0 0.25 Units A mA mA/ MHz
IC
Total Power Supply Current(6)
VIN = VCC VIN = GND VIN = 3.4V VIN = GND
1.5
3.5(5)
mA
1.8
4.5(5)
VIN = VCC VIN = GND VIN = 3.4V VIN = GND
3.0
6.0(5)
5.0
14.0(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 = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V); 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 ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) 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) fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
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PI74FCT828/2828T (inverting) Switching Characteristics over Operating Range
828AT/2828AT 828BT/2828BT 828CT
Notes: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT827/828T (25 Series) P174FCT2827/2828T 10-BIT BUFFERS
PI74FCT827/2827T (non-inverting) Switching Characteristics over Operating Range
827AT/2827AT 827BT/2827BT 827CT/2827CT 827DT
Com. Parameters tPLH tPHL Description Propagation Delay DN to YN Conditions(1) CL = 50pF RL = 500 CL = 300pF(3) RL = 500 CL = 50pF RL = 500 CL = 300pF(3) RL = 500 CL = 5pF(3) RL = 500 CL = 50pF RL = 500 Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 6.5 15.0 9.5 23.0 8.5 10.0
Com. Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 5.0 13.0 8.0 15.0 6.0 7.0
Com. Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 4.4 10.0 7.0 14.0 5.7 6.0
Com. Min. Max. 1.5 1.5 1.5 1.5 1.5 1.5 3.8 7.5 5.0 9.0 4.3 4.3 ns Units
tPZH tPZL
Output Enable Time OEN to YN
tPHZ tPLZ
Output Disable Time(3) OEN to YN
Com. Parameters tPLH tPHL Description Propagation Delay DN to YN Conditions
(1)
Com. Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 5.5 13.0 8.0 15.0 6.0 7.0
Com. Min. 1.5 1.5 1.5 1.5 1.5 1.5 Max. 4.4 10.0 7.0 14.0 5.7 6.0 Units ns ns ns ns ns ns
Min. 1.5 1.5 1.5 1.5 1.5 1.5
Max. 6.5 15.0 9.5 23.0 8.5 10.0
tPZH tPZL
Output Enable Time OEN to YN
tPHZ tPLZ
Output Disable Time(3) OEN to YN
CL = 50 pF RL = 500 CL = 300 pF(3) RL = 500 CL = 50 pF RL = 500 CL = 300 pF(3) RL = 500 CL = 5 pF(3) RL = 500 CL = 50 pF RL = 500
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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PS2029B 10/27/98

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