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| Ordering number : EN4627 CMOS LSI LC74FCT16425T, 74FCT162245T Fast 16-Bit CMOS Bidirectional Transceiver Overview The LC74FCT16245T and LC74FCT162245T 16-bit transceivers are fabricated in an advanced two-metal-layer CMOS technology. These fast, low-power transceivers are optimal for synchronous communication between two buses, referred to as the A and B busses. The directionality and output enable control in these products is designed to allow them to be used as either two independent 8-bit transceivers or as a single 16-bit transceiver. The direction control pin (x DIR) controls the data flow direction and the output enable pin (x OE) disables directionality control and disables both ports. The LC74FCT16245T is optimal for driving largecapacitance loads and low-impedance loads. The LC74FCT162245T provides a balanced output drive function that incorporates current limiting resistors. These minimize ground bounce and undershoot, and limit the output fall time. As a result, external series terminating resistors are no longer required. The LC74FCT162245T is a plug-in replacement for the LC74FCT16245T in on-board interface applications. Package Dimensions unit: mm 3163A-SQFP48 [LC74FCT16245T, 74FCT162245T] SANYO: SQFP48 Features * 0.8 m CMOS technology * Fast, low-power CMOS replacement products for use in ABT function applications * ESD tolerance > 2000 V; MIL-STD-883 (when tested with the 3015 method) * ESD tolerance > 200 V; For a machine model with C = 200 pF and R = 0 * Bidirectional data transfer * 20 mil center SQFP * Expanded temperature range: -40 to +85C * VCC = 5 V 10% LC74FCT16245T Features * High drive output levels (IOH: -32 mA, IOL: 40 mA) LC74FCT162245T Features * Balanced output drive: 24 mA * Reduced system switching noise SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 63095HA (OT) No. 4627-1/8 LC74FCT16245T, 74FCT162245T Function Block Diagram No. 4627-2/8 LC74FCT16245T, 74FCT162245T Pin Functions Pin x OE x DIR x AX x BX Function Output enable input (active low) Direction control input A side input or three-state output B side input or three-state output Specifications Absolute Maximum Ratings*1 Parameter Pin voltage referenced to GND Pin voltage referenced to GND Operating temperature Temperature when bias is applied Storage temperature Power dissipation DC output current Symbol VTERM*2 VTERM*3 Topr TBIAS Tstg PT IOUT Conditions Ratings -0.5 to +7.0 -0.5 to VCC + 0.5 -40 to +85 -55 to +125 -55 to +125 *4 -60 to +60 Unit V V C C C W mA Note: 1. Applying stresses in excess of the absolute maximum ratings may permanently damage the device. The values specified here are stress ratings only, and do not refer to operation under conditions outside either these conditions or the operating conditions. Operating for extended periods at the absolute maximum ratings may adversely influence device reliability. Unless otherwise specified, pin voltages must not exceed V CC + 0.5 V. 2. All pins except the FCT162xxxT output and I/O pins 3. All FCT162xxxT output and I/O pins 4. See Figure 1. Function Truth Table* Input x OE L L H x DIR L H ! Output Bus B data output to bus A Bus A data output to bus B High-impedance state. Note: * H = High level L = Low level ! = Don't care Figure 1 Capacitances (Ta = 25C) Parameter* Input capacitance I/O capacitance Symbol CIN CI/O Conditions min typ 5.5 4.5 max 8.0 6.0 Unit pF pF Note: * These capacitance values are logic values, and are not tested. No. 4627-3/8 LC74FCT16245T, 74FCT162245T DC Electrical Characteristics in the Operating Ranges The following conditions apply unless otherwise specified. Ta = -40 to +85C, VCC = +5.0 V 10% Parameter Input high level voltage Input low level voltage Input high level current (input pins) Input high level current (I/O pins) Input low level current (input pins) Input low level current (I/O pins) Quiescent current Symbol VIH VIL Conditions* Logic high level guaranteed Logic low level guaranteed min 2.0 0.8 5 IIH VCC = max 5 IIL VI = GND 15 ICCL, ICCH, ICCZ VI = VCC 15 A typ max Unit V V VCC = max, VIN = GND or VCC 0.05 1.5 mA Note: * Values stipulated in the electrical characteristics for the corresponding product must be used for the test conditions for the maximum and minimum values. LC74FCT16245T Output Drive Characteristics Parameter Symbol Conditions*1 IOH = -3 mA Output high level voltage VOH VOL VCC = min, VIN = VIH or VIL VCC = min, VIN = VIH or VIL IOH = -15 mA IOH = -32 mA*3 Output low level voltage IOL = 40 mA min 2.5 2.4 2.0 typ*2 3.5 3.5 3.0 0.2 0.55 max Unit V V V V Note: 1. Values stipulated in the electrical characteristics for the corresponding product must be used for the test conditions for the maximum and minimum values. 2. Typical values are values for VCC = 5.0 V, and an ambient temperature of +25C. 3. The test time must not exceed 1 second. LC74FCT162245T Output Drive Characteristics Parameter Output low level current Output high level current Output high level voltage Output low level voltage Symbol IODL IODH VOH VOL Conditions*1 VCC = 5 V, VIN = VIH or VIL, VOUT = 1.5 V*3 VCC = 5 V, VIN = VIH or VIL, VOUT = 1.5 V*3 VCC = min, VIN = VIH or VIL VCC = min, VIN = VIH or VIL IOH = -24 mA*4 IOL = 24 mA min 60 -60 2.4 typ*2 115 -115 3.3 0.3 0.55 max 150 -150 Unit mA mA V V Note: 1. Values stipulated in the electrical characteristics for the corresponding product must be used for the test conditions for the maximum and minimum values. 2. Typical values are values for VCC = 5.0 V, and an ambient temperature of +25C. 3. Do not test more than one output at a time. The test time must not exceed 1 second. 4. The test time must not exceed 1 second. No. 4627-4/8 LC74FCT16245T, 74FCT162245T Power Supply Current Characteristics Parameter Quiescent current high-level TTL inputs Symbol ICC Conditions*1 VCC = max, VIN = 3.4 V*3 VCC = max, outputs open, x OE = x DIR = GND, toggling a single input, 50% duty cycle VCC = max, outputs open, fi = 10 MHz, x OE = x DIR = GND, toggling a single bit, 50% duty cycle IC VCC = max, outputs open, fi = 2.5 MHz, x OE = x DIR = GND, toggling a 16 bits, 50% duty cycle VIN = VCC, VIN = GND VIN = VCC, VIN = GND VIN = 3.4 V, VIN = GND VIN = VCC, VIN = GND VIN = 3.4 V, VIN = GND min typ*2 0.5 max 1.5 Unit A Operating supply current*4 ICCD 100 160 A/MHz 0.7 0.9 2.5 6.5 2.5 3.3 mA 5.5*5 17.5*5 Total supply current*6 Note: 1. Values stipulated in the electrical characteristics for the corresponding product must be used for the test conditions for the maximum and minimum values. 2. Typical values are values for VCC = 5.0 V, and at an ambient temperature of +25C. 3. For the TTL drive inputs (VIN = 3.4 V), connect all the other inputs to VCC or GND. 4. Although this parameter cannot be directly measured, it is provided for calculating the total power dissipation. 5. The values for these conditions are values with respect to the ICC rating. Although these values are guaranteed, they are not tested. 6. IC + IQUIESCENT + IINPUTS + IDYNAMIC IC + ICC + ICC, DHNT + ICCD (fCPNCP/2 + fiNi) ICC = Quiescent current (ICCL, ICCH, and ICCZ) ICC = Supply current for the high-level TTL inputs (VIN = 3.4 V) DH = Duty cycle for the high-level TTL inputs NT = The number of TTL inputs in DH ICCD = Operating current due to input transition pairs (HLH or LHL) fCP = Clock frequency for register devices (zero for non-register devices) NCP = The number of clocks input in fCP fi = Input frequency Ni = The number of inputs in fi. LC74FCT16245T/162245T Switching Characteristics in the Operating Ranges Parameter Transmission delay (From A to B or from B to A) Output enable time (From x OE to A or B) Output disable time (From x OE to A or B) Output enable time (From x DIRS to A or B*3) Output disable time (From x DIRS to A or B*3) Output skew*4 Note: 1. 2. 3. 4. Symbol tPLH, tPHL tPZH*1, tPZL*1 tPHZ*1, tPLZ*1 tPZH*2, tPZL*2 tPHZ*2, tPLZ*2 tSK (O) Conditions*1 min 1.5 1.5 1.5 1.5 1.5 typ max 7.0 12.0 7.5 9.5 7.5 0.5 Unit ns ns ns ns ns ns CL = 50 pF, RL = 500 See the figures for the test circuit and waveforms. Although the minimum values are guaranteed, the transmission delay is not tested. Although these items are guaranteed, they are not tested. The skew between two outputs in the same package switched in the same direction. This parameter is a design guarantee. No. 4627-5/8 LC74FCT16245T, 74FCT162245T Pin Assignment Test Circuit and Waveform Diagrams Test Circuit for All Outputs Switch Positions Test Open drain, Disable low level, Enable low level All other tests Switch Closed Open Definitions: CL = Load capacitance: including the jig and probe capacitances RT = Terminating resistance: equivalent to the pulse generator's Zout. No. 4627-6/8 LC74FCT16245T, 74FCT162245T Setup, Hold, and Release Timing Transmission Delay Pulse Width No. 4627-7/8 LC74FCT16245T, 74FCT162245T Enable and Disable Timing Note: 1. These diagrams are for the input enable low level and the input control disable high level cases. 2. Pulse generator setup for all pulses: rate 1.0 MHz, Zo 50 , tf 2.5 ns, tr 2.5 ns s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of June, 1995. Specifications and information herein are subject to change without notice. PS No. 4627-8/8 |
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