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74ABTH16952DGG Folha de dados(PDF) 2 Page - NXP Semiconductors |
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2 / 12 page Philips Semiconductors Product specification 74ABT16952 74ABTH16952 16-bit registered transceiver (3-State) 2 1998 Feb 25 853-1814 19018 FEATURES • Two 8-bit registered transceivers • Live insertion/extraction permitted • Power-up 3-State • 74ABTH16952 incorporates bus-hold data inputs which eliminate the need for external pull-up resistors to hold unused inputs • Power-up reset • Multiple V CC and GND pins minimize switching noise • Independent registers for A and B buses • Output capability: +64mA/–32mA • Latch-up protection exceeds 500mA per Jedec Std 17 • ESD protection exceeds 2000V per MIL STD 883 Method 3015 and 200V per Machine Model • Bus-hold data inputs eliminate the need for external pull-up resistors to hold unused inputs DESCRIPTION The 74ABT16952 high-performance BiCMOS device combines low static and dynamic power dissipation with high speed and high output drive. The 74ABT16952 is a dual octal registered transceiver. Two 8-bit registers store data flowing in both directions between two bidirectional buses. Data applied to the inputs is entered and stored on the rising edge of the Clock (nCPXX) provided that the Clock Enable (nCEXX) is Low. The data is then present at the 3-State output buffers, but is only accessible when the Output Enable (nOEXX) is Low. Data flow from A inputs to B outputs is the same as for B inputs to A outputs. Two options are available, 74ABT16952 which does not have the bus-hold feature and 74ABTH16952 which incorporates the bus-hold feature. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS Tamb = 25°C; GND = 0V TYPICAL UNIT tPLH tPHL Propagation delay nCPBA to nAx or nCPAB to nBx CL = 50pF; VCC = 5V 2.8 2.3 ns CIN Input capacitance VI = 0V or VCC 4 pF CI/O I/O capacitance VO = 0V or VCC; 3-State 7 pF ICCZ Quiescent supply current Outputs disabled; VCC = 5.5V 500 µA ICCL Quiescent su ly current Outputs LOW; VCC = 5.5V 8 mA ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER 56-Pin Plastic SSOP Type III –40 °C to +85°C 74ABT16952 DL BT16952 DL SOT371-1 56-Pin Plastic TSSOP Type II –40 °C to +85°C 74ABT16952 DGG BT16952 DGG SOT364-1 56-Pin Plastic SSOP Type III –40 °C to +85°C 74ABTH16952 DL BH16952 DL SOT371-1 56-Pin Plastic TSSOP Type II –40 °C to +85°C 74ABTH16952 DGG BH16952 DGG SOT364-1 PIN DESCRIPTION PIN NUMBER SYMBOL NAME AND FUNCTION 2, 55 18, 22 1CPAB / 1CPBA 2CPAB / 2CPBA Clock input A to B / Clock input B to A 3, 54, 26, 31 1CEAB / 1CEBA 2CEAB / 2CEBA Clock enable input A to B / Clock enable input B to A 52, 51, 49, 48, 47, 45, 44, 43 42, 41, 40, 38, 37, 36, 34, 33 1A0 – 1A7 2A0 – 2A7 Data inputs/outputs (A side) 1, 56 8, 29 1B0 – 1B7 2B0 – 2B7 Data inputs/outputs (B side) 4, 11, 18, 25, 32, 39, 45, 53 1OEAB / 1OEBA 2OEAB / 2OEBA Output enable inputs 4, 17, 30, 43 GND Ground (0V) 7, 22, 35, 50 VCC Positive supply voltage |
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