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74FCT162H245CTPVC Datasheet(PDF) 1 Page - Texas Instruments |
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74FCT162H245CTPVC Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page 16-Bit Transceivers CY74FCT16245T CY74FCT162245T CY74FCT162H245T SCCS026B - July 1994 - Revised September 2001 Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. Copyright © 2001, Texas Instruments Incorporated 1CY74FCT16445T/2 H245T Features • Ioff supports partial-power-down mode operation • Edge-rate control circuitry for significantly improved noise characteristics • Typical output skew < 250 ps • ESD > 2000V • TSSOP (19.6-mil pitch) and SSOP (25-mil pitch) packages • Industrial temperature range of –40˚C to +85˚C • VCC = 5V ± 10% CY74FCT16245T Features: • 64 mA sink current, 32 mA source current • Typical VOLP (ground bounce)<1.0V at VCC = 5V, TA = 25˚C CY74FCT162245T Features: • Balanced output drivers: 24 mA • Reduced system switching noise • Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25˚C CY74FCT162H245T Features: • Bus hold on data inputs • Eliminates the need for external pull-up or pull-down resistors Functional Description These 16-bit transceivers are designed for use in bidirectional synchronous communication between two buses, where high speed and low power are required. With the exception of the CY74FCT16245T, these devices can be operated either as two independent octals or a single 16-bit transceiver. Direction of data flow is controlled by (DIR), the Output Enable (OE) transfers data when LOW and isolates the buses when HIGH. This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The CY74FCT16245T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The CY74FCT162245T has 24-mA balanced output drivers with current limiting resistors in the outputs. This reduces the need for external terminating resistors and provides for mini- mal undershoot and reduced ground bounce. The CY74FCT162245T is ideal for driving transmission lines. The CY74FCT162H245T is a 24-mA balanced output part that has bus hold on the data inputs. The device retains the input’s last state whenever the input goes to high impedance. This eliminates the need for pull-up/down resistors and prevents floating inputs. GND Logic Block Diagrams CY74FCT16245T,CY74FCT162245T, CY74FCT162H245T Pin Configuration 1 2 3 4 5 6 7 8 9 10 11 12 33 32 31 30 29 25 26 27 28 36 35 1DIR 34 SSOP/TSSOP Top View 13 14 15 16 17 18 19 20 21 22 23 24 45 44 43 42 41 37 38 39 40 48 47 46 1B1 1B2 1B3 1B4 1A1 1A2 1A3 1A4 1OE GND GND VCC 1B7 1B8 1B5 1B6 1A5 1A6 1A7 1A8 VCC GND GND 2B3 2B4 2B1 2B2 2A1 2A2 2A3 2A4 GND GND VCC 2B7 2B8 2B5 2B6 2A5 2A6 2A7 2A8 VCC GND 2DIR 2OE FCT16245–1 1A1 1A2 1A3 1A4 1A5 1A6 1A7 1OE 1B1 1B2 1B3 1B4 1B5 1B6 1B7 1DIR 1A8 1B8 FCT16245–2 2A1 2A2 2A3 2A4 2A5 2A6 2A7 2OE 2B1 2B2 2B3 2B4 2B5 2B6 2B7 2DIR 2A8 2B8 FCT16245–3 16245T 162245T 162H245T |
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