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IDT74CBTLV3245 LOW-VOLTAGE OCTAL BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
LOW-VOLTAGE OCTAL BUS SWITCH
IDT74CBTLV3245
FEATURES:
– – – – – – – – Pin-out compatible with standard '245 logic 5Ω A/B bidirectional switch Isolation Under Power-Off Conditions Over-voltage tolerant Latch-up performance exceeds 100mA VCC = 2.3V - 3.6V, Normal Range ESD > 2000V per MIL-STD-883, Method 3015; > 200V using machine model (C = 200pF, R = 0) Available in SSOP, QSOP, and TSSOP packages
DESCRIPTION:
The octal bus switch has standard 245 pinouts. The CBTLV3245 is designed for asynchronous communication between data buses. When Output Enable (OE) is low, the 8-bit bus switch is on and port A is connected to Port B. When OE is high, the switch is off and a high impedance exists between Port A and Port B. To ensure the high-impedance state during power up or power down, OE should be tied to V CC through a pullup resistor.
APPLICATIONS:
– 3.3V High Speed Bus Switching and Bus Isolation
FUNCTIONAL BLOCK DIAGRAM
2 A1 SW
18 B1
A 9 A8 SW 11 B8
B
19 OE
OE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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c 2001 Integrated Device Technology, Inc.
JANUARY 2001
DSC-5170/-
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IDT74CBTLV3245 LOW-VOLTAGE OCTAL BUS SWITCH
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI Description Supply Voltage Range Input Voltage Range Continuous Channel Current IIK TSTG Input Clamp Current, , VI/O < 0 Storage Temperature Max. –0.5 to 4.6 –0.5 to 4.6 128 –50
(1)
Unit V V mA mA °C
NC A1 A2 A3 A4 A5 A6 A7 A8 GND
1 2 3 4 5 6 7 8 9 10 SO20-7 SO20-8 SO20-9
20 19 18 17 16 15 14 13 12 11
V CC OE B1 B2 B3 B4 B5 B6 B7 B8
–65 to +150
NOTE: 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.
PIN DESCRIPTION
Pin Names OE Ax Bx Description Output Enable (Active LOW) Port A Inputs or Outputs Port B Inputs or Outputs
SSOP/ TSSOP/ QSOP TOP VIEW
FUNCTION TABLE
Input OE L H
NOTE: 1. H = HIGH Voltage Level L = LOW Voltage Level
(1)
Operation A Port = B Port Isolation
OPERATING CHARACTERISTICS, TA = 25ºC
Symbol VCC VIH VIL TA Parameter Supply Voltage High-Level Control Input Voltage Low-Level Control Input Voltage Operating Free-Air Temperature VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V VCC = 2.3V to 2.7V VCC = 2.7V to 3.6V Test Conditions Min. 2.3 1.7 2 — — −40 Max. 3.6 — — 0.7 0.8 +85 °C V Unit V V
NOTE: 1. All unused control inputs must be held at VCC or GND to ensure proper device operation.
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IDT74CBTLV3245 LOW-VOLTAGE OCTAL BUS SWITCH
INDUSTRIAL TEMPERAT.