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74FCT162H952CTPVCT Datasheet(PDF) 1 Page - Texas Instruments |
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74FCT162H952CTPVCT Datasheet(HTML) 1 Page - Texas Instruments |
1 / 8 page 16-Bit Registered Transceivers CY74FCT16952T CY74FCT162952T CY74FCT162H952T Data sheet acquired from Cypress Semiconductor Corporation. Data sheet modified to remove devices not offered. SCCS065A - August 1994 - Revised March 2000 Copyright © 2000, Texas Instruments Incorporated 1CY74FCT162H952 T Features • FCT-E speed at 3.7 ns • Power-off disable outputs permits live insertion • 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% CY74FCT16952T Features: • 64 mA sink current, 32 mA source current • Typical VOLP (ground bounce) <1.0V at VCC = 5V, TA = 25˚C CY74FCT162952T Features: • Balanced 24 mA output drivers • Reduced system switching noise • Typical VOLP (ground bounce) <0.6V at VCC = 5V, TA= 25˚C CY74FCT162H952T Features: • Bus hold retains last active state • Eliminates the need for external pull-up or pull-down resistors Functional Description These 16-bit registered transceivers are high-speed, low-power devices. 16-bit operation is achieved by connecting the control lines of the two 8-bit registered transceivers together. For data flow from bus A-to-B, CEAB must be LOW to allow data to be stored when CLKAB transitions from LOW-to-HIGH. The stored data will be present on the output when OEAB is LOW. Control of data from B-to-A is similar and is controlled by using the CEBA, CLKBA, and OEBA inputs. The output buffers are designed with a power-off disable feature to allow for live insertion of boards. The CY74FCT16952T is ideally suited for driving high-capacitance loads and low-impedance backplanes. The CY74FCT162952T has 24-mA balanced output drivers with current-limiting resistors in the outputs. This reduces the need for external terminating resistors and provides for minimal undershoot and reduced ground bounce. The CY74FCT162952T is ideal for driving transmission lines. The CY74FCT162H952T 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. Logic Block Diagrams Pin Configuration 1 OEAB SSOP/TSSOP Top View 1 CLKBA 1B1 1B2 GND VCC GND GND FCT16952–1 1B1 TO 7 OTHER CHANNELS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 1CEBA 1OEAB 1CEAB 1 CLKAB 1 OEBA 1A1 D C CE D C CE 1 CEAB 1 CLKAB GND 1A1 1A2 1A3 1A4 GND 2A1 2A2 2A3 2A4 VCC 1A5 1A6 1A7 1A8 GND 2A5 2A6 2A7 2A8 2 CLKAB GND 2OEAB 2CEAB VCC 1 OEBA 1CEBA 1 CLKBA GND 2 CLKBA 2 OEBA 2CEBA 1B3 1B6 1B7 1B8 1B4 1B5 2B1 2B3 2B4 2B2 2B5 2B6 2B7 2B8 VCC 2 CLKBA 2B 1 2OEAB 2CEAB 2 CLKAB 2 OEBA 2A1 D C CE D C CE 2CEBA FCT16952–2 FCT16952–3 TO 7 OTHER CHANNELS |
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