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74LV245D 数据表(PDF) 2 Page - NXP Semiconductors |
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74LV245D 数据表(HTML) 2 Page - NXP Semiconductors |
2 / 12 page Philips Semiconductors Product specification 74LV245 Octal bus transceiver (3-State) 2 1998 Apr 20 853–1931 19258 FEATURES • Wide operating voltage: 1.0 to 5.5 V • Optimized for low voltage applications: 1.0 to 3.6 V • Accepts TTL input levels between V CC = 2.7 V and VCC = 3.6 V • Typical V OLP (output ground bounce) < 0.8 V at VCC = 3.3 V, Tamb = 25°C • Typical V OHV (output VOH undershoot) > 2 V at VCC = 3.3 V, Tamb = 25°C • Output capability: bus driver • I CC category: MSI DESCRIPTION The 74LV245 is a low-voltage Si-gate CMOS device and is pin and function compatible with 74HC/HCT245. The 74LV245 is an octal transceiver featuring non-inverting 3-State bus compatible outputs in both send and receive directions. The 74LV245 features an output enable (OE) input for easy cascading and a send/receive (DIR) input for direction control. OE controls the outputs so that the buses are effectively isolated. QUICK REFERENCE DATA GND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5 ns SYMBOL PARAMETER CONDITIONS TYPICAL UNIT tPHL/tPLH Propagation delay An to Bn; Bn to An CL = 15 pF; VCC = 3.3 V 7.0 ns CI Input capacitance 3.5 pF CI/O Input/output capacitance 10 pF CPD Power dissipation capacitance per buffer VCC = 3.3 V VI = GND to VCC, note 1 40 pF NOTE: 1. CPD is used to determine the dynamic power dissipation (PD in µW) PD = CPD VCC2 fi ) (CL VCC2 fo) where: fi = input frequency in MHz; CL = output load capacitance in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL VCC2 fo) = sum of the outputs. ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. # 20-Pin Plastic DIL –40 °C to +125°C 74LV245 N 74LV245 N SOT146-1 20-Pin Plastic SO –40 °C to +125°C 74LV245 D 74LV245 D SOT163-1 20-Pin Plastic SSOP Type II –40 °C to +125°C 74LV245 DB 74LV245 DB SOT339-1 20-Pin Plastic TSSOP Type I –40 °C to +125°C 74LV245 PW 74LV245PW DH SOT360-1 PIN DESCRIPTION PIN NUMBER SYMBOL FUNCTION 1 DIR Direction 2, 3, 4, 5, 6, 7, 8, 9 A0 to A7 Data inputs/outputs 10 GND Ground (0 V) 18, 17, 16, 15, 14, 13, 12, 11 B0 to B7 Data inputs/outputs 19 OE Output enable input (active LOW) 20 VCC Positive supply voltage FUNCTION TABLE INPUTS INPUTS/OUTPUT OE DIR An Bn L L A = B Inputs L H Inputs B = A H X Z Z NOTES: H = HIGH voltage level L = LOW voltage level X = don’t care Z = high impedance OFF-state |
类似零件编号 - 74LV245D |
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类似说明 - 74LV245D |
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