器件名称: 74ALVC164245DGGRG4
功能描述: 16-BIT 3.3-V TO 5-V LEVEL SHIFTING TRANSCEIVER WITH 3-STATE OUTPUTS
文件大小: 489.96KB 共20页
简 介:SN74ALVC164245 16-BIT 2.5-V TO 3.3-V/3.3-V TO 5-V LEVEL-SHIFTING TRANSCEIVER WITH 3-STATE OUTPUTS
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SCAS416P – MARCH 1994 – REVISED NOVEMBER 2005
FEATURES
Member of the Texas Instruments Widebus Family Max tpd of 5.8 ns at 3.3 V ±24-mA Output Drive at 3.3 V Control Inputs VIH/VIL Levels Are Referenced to VCCA Voltage Latch-Up Performance Exceeds 250 mA Per JESD 17
NOTE: New and improved versions of the SN74ALVC164245 are available. The new part numbers are SN74LVC16T245 and SN74LVCH16T245 and should be considered for new designs.
DGG OR DL PACKAGE (TOP VIEW)
DESCRIPTION/ORDERING INFORMATION
This 16-bit (dual-octal) noninverting bus transceiver contains two separate supply rails. B port has VCCB, which is set to operate at 3.3 V and 5 V. A port has VCCA, which is set to operate at 2.5 V and 3.3 V. This allows for translation from a 2.5-V to a 3.3-V environment, and vice versa, or from a 3.3-V to a 5-V environment, and vice versa. The SN74ALVC164245 is designed for asynchronous communication between data buses. The control circuitry (1DIR, 2DIR, 1OE, and 2OE) is powered by VCCA. To ensure the high-impedance state during power up or power down, the output-enable (OE) input should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
1DIR 1B1 1B2 GND 1B3 1B4 (3.3 V, 5 V) VCCB 1B5 1B6 GND 1B7 1B8 2B1 2B2 GND 2B3 2B4 (3.3 V, 5 V) VCCB 2B5 2B6 GND 2B7 2B8 2DIR
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