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74VCX162245 Low Voltage 16-Bit Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26: Series Resistors in A Port Outputs
October 1996 Revised June 2005
74VCX162245 Low Voltage 16-Bit Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26: Series Resistors in A Port Outputs
General Description
The VCX162245 contains sixteen non-inverting bidirectional buffers with 3-STATE outputs and is intended for bus oriented applications. The device is byte controlled. Each byte has separate 3-STATE control inputs which can be shorted together for full 16-bit operation. The T/R inputs determine the direction of data flow through the device. The OE inputs disable both the A and B ports by placing them in a high impedance state. The 74VCX162245 is designed for low voltage (1.4V to 3.6V) VCC applications with I/O compatibility up to 3.6V. The 74VCX162245 is also designed with 26: series resistance in the A Port outputs. This design reduces line noise in applications such as memory address drivers, clock drivers, and bus transceivers/transmitters. The 74VCX162245 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation.
Features
s 1.4V to 3.6V VCC supply operation s 3.6V tolerant inputs and outputs s 26: series resistors in A port outputs s tPD (B to A)
3.4 ns max for 3.0V to 3.6V VCC
s Power-down high impedance inputs and outputs s Supports live insertion/withdrawal (Note 1) s Static Drive (IOH/IOL A outputs)
r12 mA @ 3.0V VCC
s Uses patented noise/EMI reduction circuitry s Latchup performance exceeds 300 mA s ESD performance:
Human body model ! 2000V Machine model !200V
Note 1: To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pull-up resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver.
Ordering Code:
Order Number 74VCX162245MTD Package Number MTD48 Package Description 48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Pin Descriptions
Pin Description Names OEn T/Rn A0–A15 B0–B15 Output Enable Input Transmit/Receive Input Side A Inputs or 3-STATE Outputs Side B Inputs or 3-STATE Outputs
© 2005 Fairchild Semiconductor Corporation
DS500048
www.fairchildsemi.com
74VCX162245
Connection Diagram
Truth Tables
Inputs OE1 L L H Inputs OE2 L L H T/R2 L H X Bus B8–B15 Data to Bus A8–A15 Bus A8–A15 Data to Bus B8–B15 HIGH Z State on A8–A15, B8–B15 T/R1 L H X Bus B0–B7 Data to Bus A0–A7 Bus A0–A7 Data to Bus B0–B7 HIGH Z State on A0–A7, B0–B7 Outputs Outputs
H HIGH Voltage Level L LOW Voltage Level X Immaterial (HIGH or LOW, inputs and I/O’s may not float) Z High Impedance
Logic Diagram
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2
74VCX162245
Absolute Maximum Ratings(Note 2)
Supply Voltage (VCC) DC Input Voltage (VI) Output Voltage (VO) Outputs 3-State Outputs Active (Note 3) DC Input Diode Current (IIK) VI 0V DC Output Diode Current (IOK) VO 0V VO ! VCC DC Output Source/Sink Current (IOH/IOL) DC VCC or Ground Current per Supply Pin (ICC or Ground) Storage Temperature Range (TSTG)
0.5V to 4.6V 0.5V to 4.6V 0.5V to 4.6V 0.5 to VCC 0.5V 50 mA 50 mA 50 mA r50 mA r100 mA 65qC to 150qC
Recommended Operating Conditions (Note 4)
Power Supply Operating Data Retention Only Input Voltage Output Voltage (VO) Output in Active States Output in 3-STATE Output Current in IOH/IOL-A Outputs VCC VCC VCC VCC VCC VCC 3.0V to 3.6V 2.3V to 2.7V 1.65V to 1.95V 3.0V to 3.6V 2.3V to 2.7V 1.65V to 2.3V 0V to VCC 0.0V to 3.6V 1.4V to 3.6V 1.2V to 3.6V
0.3V to 3.6V
r12 mA r8 mA r3 mA r 24mA r 18mA r6mA 40qC to 85qC
10 ns/V
Output Current in r IOH/IOL-B Outputs
Free Air Operating Temperature (TA) Minimum Input Edge Rate ('t/'V) VIN 0.8V to 2.0V, VCC 3.0V
Note 2: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The Recommended Operating Conditions tables will define the conditions for actual device operation. Note 3: IO Absolute Maximum Rating must be observed. Note 4: Floating or unused pins (inputs or I/O's) must be held HIGH or LOW.
DC Electrical Characteristics
Symbol VIH Parameter HIGH Level Input Voltage Conditions VCC (V) 2.7 - 3.6 2.3 - 2.7 1.65 - 2.3 1.4 - 1.6 VIL LOW Level Input Voltage 2.7 - 3.6 2.3 - 2.7 1.65 - 2.3 1.4 - 1.6 VOH HIGH Level Output Voltage A Outputs IOH IOH IOH IOH IOH IOH IOH IOH IOH IOH IOH IOH Min 2.0 1.6 0.65 x VCC 0.65 x VCC 0.8 0.7 0.35 x VCC 0.35 x VCC VCC - 0.2 2.2 2.4 2.2 VCC - 0.2 2.0 1.8 1.7 VCC - 0.2 1.4 VCC - 0.2 1.05 V V V Max Units
100 PA 6 mA 8 mA 12 mA 100 PA 4 mA 6 mA 8 mA 100 PA 3 mA 10.