IDT74FCT621T_16 IDT | Alldatasheet

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INDUSTRIAL TEMPERATURE RANGE IDT74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) NOVEMBER 2016INDUSTRIAL TEMPERATURE RANGE IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. © 2016 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. DSC-2538/13 FEATURES:

  • Std. and A grades
  • Low input and output leakage ≤ ≤≤ ≤≤1µA (max.)
  • CMOS power levels
  • True TTL input and output compatibility: –V OH = 3.3V (typ.) –V OL = 0.3V (typ.)
  • Meets or exceeds JEDEC standard 18 specifications
  • Power off disable outputs permit "live insertion"
  • Available in SOIC package FUNCTIONAL BLOCK DIAGRAM IDT74FCT621T/A TFAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) DESCRIPTION: The IDT74FCT621T is an octal transceiver with non-inverting Open- Drain bus compatible outputs in both send and receive directions. The B bus outputs are capable of sinking 64mA providing very good capacitive drive characteristics. These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. GBA GAB A 1 B1 A2-A8 B2-B8 SEVEN OTHER TRANSCEIVERS 21 8

INDUSTRIAL TEMPERATURE RANGE IDT74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) PIN CONFIGURATION Symbol Description Max Unit VTERM(2) Terminal Voltage with Respect to GND –0.5 to +7 V VTERM(3) Terminal Voltage with Respect to GND –0.5 to V CC+0.5 V TSTG Storage Temperature –65 to +150 ° C IOUT DC Output Current –60 to +120 mA ABSOLUTE MAXIMUM RATINGS (1) NOTES: 1. Stresses greater than those listed under ABSOLUTE 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. No terminal voltage may exceed Vcc by +0.5V unless otherwise noted. 2. Inputs and Vcc terminals only. 3. Output and I/O terminals only. Symbol Parameter (1) Conditions Typ. Max. Unit CIN Input Capacitance V IN = 0V 6 10 pF COUT Output Capacitance V OUT = 0V 8 12 pF CAPACITANCE (TA = +25°C, F = 1.0MHz) NOTE: 1. This parameter is measured at characterization but not tested. SOIC TOP VIEW VCC GND GBA GAB PIN DESCRIPTION Pin Names Description GBA, GAB Enable Inputs A1 – A 8 A Inputs or Open-drain Outputs B1 – B 8 B Inputs or Open-drain Outputs FUNCTION TABLE (1) Enable Inputs GBA GAB Function L L B data to A bus H H A data to B bus H L OFF L H B data to A bus A data to B bus NOTE: 1. H = HIGH Voltage Level. L = LOW Voltage Level. OFF = HIGH if pull-up resistor is connected to Open-Drain output.

INDUSTRIAL TEMPERATURE RANGE IDT74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE Following Conditions Apply Unless Otherwise Specified: Industrial: TA = –40°C to +85°C, V CC = 5.0V ±5% Symbol Parameter Test Conditions(1) Min. Typ. (2) Max. Unit VIH Input HIGH Level Guaranteed Logic HIGH Level 2 — — V VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V IIH Input HIGH Current(4) VCC = Max., VI = 2.7V — — ±1 µA IIL Input LOW Current(4) VCC = Max., VI = 0.5V — — ±1 µA II Input HIGH Current(4) VCC = Max., VI = VCC (Max.) — — ±1 µA VIK Clamp Diode Voltage V CC = Min., IN= –18mA — –0.7 –1.2 V IOH Output HIGH Current V CC = Max. V OH = Vcc (Max.) — — 20 µA VIN = VIH or VIL VOL Output LOW Voltage V CC = Min. I OL = 64mA (3) — 0.3 0.55 V (B Bus) V IN = VIH or VIL VOL Output LOW Voltage V CC = Min. I OL = 48mA (3) — 0.3 0.5 V (A Bus) V IN = VIH or VIL IOFF Input/Output Power Off V CC = 0V, VIN or VO - 4.5V — — ±1 µA Leakage(4) VH Input Hysteresis — — 200 — mV ICC Quiescent Power Supply V CC = max., VIN = GND or Vcc — 0.01 1 mA Current NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at V CC = 5.0V, +25°C ambient. 3. These are maximum I OL values per output, for 8 outputs turned on simultaneously. Total maximum I OL (all outputs) is 512mA for commercial and 384mA for military. Derate IOL for number of outputs exceeding 8 turned on simultaneously. 4. The test limit for this parameter is ±5µA at T A = –55°C.

INDUSTRIAL TEMPERATURE RANGE IDT74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) NOTES: 1. See test circuit and waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. IDT74FCT621T IDT74FCT621AT Symbol Parameter Condition (1) Min.(2) Max. Min.(2) Max. Unit tPLH Propagation Delay, A to B C L = 50pF 5.5 13 5.5 12 ns tPHL RL = 500Ω 1.5 8.5 1.5 6.8 tPLH Propagation Delay, B to A 5.5 12.5 5.5 12 ns tPHL 1.5 8 1.5 6.4 tPLH Propagation Delay, GBA to A 5.5 14 5.5 13 ns tPHL 1.5 8.5 1.5 6.8 tPLH Propagation Delay, GAB to B 5.5 14 5.5 13 ns tPHL 1.5 8 1.5 6.4 SWITCHING CHARACTERISTICS OVER OPERATING RANGE POWER SUPPLY CHARACTERISTICS Symbol Parameter Test Conditions(1) Min. Typ. (2) Max. Unit ΔICC Quiescent Power Supply Current V CC = Max. — 0.5 2 mA TTL Inputs HIGH V IN = 3.4V(3) ICCD Dynamic Power Supply Current(4) Vcc = Max. V IN = VCC — 0.15 0.25 mA/MHz Outputs Open V IN = GND GBA = GAB = GND or V CC One Input Toggling 50% Duty Cycle IC Total Power Supply Current(6,7) Vcc = Max. V IN = VCC — 1.5 3.5 mA Outputs Open V IN = GND GBA = GAB = GND or V CC One Bit Toggling V IN = 3.4V — 1.8 4.5 at fi =10MHz V IN = GND 50% Duty Cycle Vcc = Max. V IN = VCC —36 (5) Outputs Open V IN = GND GBA = GAB = GND or V CC Eight Bits Toggling V IN = 3.4V — 5 14 (5) at fi = 2.5MHz V IN = GND 50% Duty Cycle NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at V CC = 5.0V, +25°C ambient. 3. Per TTL driven input (V IN = 3.4V); all other inputs at V CC 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 I CC formula. These limits are guaranteed but not tested. 6. I C = IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ΔICC DHNT + ICCD (fCP/2 + f iNi) ICC = Quiescent Current ΔICC = Power Supply Current for a TTL High Input (V IN = 3.4V) DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at D H ICCD = Dynamic Current Caused by an Output Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) fi = Input Frequency Ni = Number of Inputs at f i All currents are in milliamps and all frequencies are in megahertz. 7. This test is performed with outputs tied to GND through a pull-down resistor.

INDUSTRIAL TEMPERATURE RANGE IDT74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN) Pulse Generator R T D.U.T VCC VIN C L VOUT 50pF 500W 500W 7.0V 1.5V 1.5V 1.5V 1.5V DATA INPUT TIMING INPUT ASYNCHRONOUS CONTROL PRESET CLEAR ETC. SYNCHRONOUS CONTROL tSU tH tREM tSU tH HIGH-LOW-HIGH PULSE LOW-HIGH-LOW PULSE tW 1.5V 1.5V SAME PHASE INPUT TRANSITION 1.5V 1.5V VOH tPLH OUTPUT OPPOSITE PHASE INPUT TRANSITION 1.5V tPLH tPHL tPHL VOL CONTROL INPUT 1.5V 3.5V OUTPUT NORMALLY LOW OUTPUT NORMALLY HIGH SWITCH CLOSED SWITCH OPEN VOL 0.3V 0.3V tPLZtPZL tPZH tPHZ 3.5V 1.5V 1.5V ENABLE DISABLE VOH PRESET CLEAR CLOCK ENABLE ETC. Octal Link Octal Link Octal Link Octal Link Octal Link TEST CIRCUITS AND WAVEFORMS Propagation Delay Test Circuits for All Outputs Enable and Disable Times Set-Up, Hold, and Release Times Pulse Width NOTES: 1. Diagram shown for input Control Enable-LOW and input Control Disable-HIGH. Test Switch Open Drain Disable Low Closed Enable Low All Other Tests Open SWITCH POSITION DEFINITIONS: CL = Load capacitance: includes jig and probe capacitance. RT = Termination resistance: should be equal to Z OUT of the Pulse Generator.

INDUSTRIAL TEMPERATURE RANGE IDT74FCT621T/AT FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)

ORDERING INFORMATION

SO Small Outline IC (PSG20) − 40°C to +85°C74 Tube Tape and Reel X Blank X G Green 621T 621AT Octal Bus Transceiver (Open Drain) CORPORATE HEADQUARTERS for SALES: for Tech Support: 6024 Silver Creek Valley Road 800-345-7015 or 408-284-8200 logichelp@idt.com San Jose, CA 95138 fax: 408-284-2775 www.idt.com Datasheet Document History 10/10/2009 Pg. 6 Updated the ordering information by removing the "IDT" notation and non RoHS part. 10/22/2014 Pg. 6 Added Tape & Reel to ordering information. 11/26/2016 Pg. 6 Updated ordering information diagram temperature symbol, removed tray and created Green option in greater detail.