74LVCH8T245PW

74LVC8T245; 74LVCH8T245 8-bit dual supply translating transceiver; 3-state Rev. 3 — 12 December 2011 Product data sheet 1. General description The 74LVC8T245; 74LVCH8T245 are 8-bit dual supply translating transceivers with 3-state outputs that enable bidirectional level translation. They feature two data input-output ports (pins An and Bn), a direction control input (DIR), an output enable input (OE) and dual supply pins (VCC(A) and VCC(B)). Both VCC(A) and VCC(B) can be supplied at any voltage between 1.2 V and 5.5 V making the device suitable for translating between any of the low voltage nodes (1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V and 5.0 V). Pins An, OE and DIR are referenced to VCC(A) and pins Bn are referenced to VCC(B). A HIGH on DIR allows transmission from An to Bn and a LOW on DIR allows transmission from Bn to An. The output enable input (OE) can be used to disable the outputs so the buses are effectively isolated. The devices are fully specified for partial power-down applications using IOFF. The IOFF circuitry disables the output, preventing any damaging backflow current through the device when it is powered down. In suspend mode when either VCC(A) or VCC(B) are at GND level, both A port and B port are in the high-impedance OFF-state. Active bus hold circuitry in the 74LVCH8T245 holds unused or floating data inputs at a valid logic level. 2. Features and benefits  Wide supply voltage range:  VCC(A): 1.2 V to 5.5 V  VCC(B): 1.2 V to 5.5 V  High noise immunity  Complies with JEDEC standards:  JESD8-7 (1.2 V to 1.95 V)  JESD8-5 (1.8 V to 2.7 V)  JESD8C (2.7 V to 3.6 V)  JESD36 (4.5 V to 5.5 V)  ESD protection:  HBM JESD22-A114F Class 3A exceeds 4000 V  MM JESD22-A115-B exceeds 200 V  CDM JESD22-C101E exceeds 1000 V  Maximum data rates:  420 Mbps (3.3 V to 5.0 V translation)  210 Mbps (translate to 3.3 V))  140 Mbps (translate to 2.5 V)  75 Mbps (translate to 1.8 V) 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state          60 Mbps (translate to 1.5 V) Suspend mode Latch-up performance exceeds 100 mA per JESD 78B Class II 24 mA output drive (VCC = 3.0 V) Inputs accept voltages up to 5.5 V Low power consumption: 30 A maximum ICC IOFF circuitry provides partial Power-down mode operation Multiple package options Specified from 40 C to +85 C and 40 C to +125 C 3. Ordering information Table 1. Ordering information Type number Package 74LVC8T245PW Temperature range Name Description Version 40 C to +125 C TSSOP24 plastic thin shrink small outline package; 24 leads; body width 4.4 mm SOT355-1 40 C to +125 C DHVQFN24 plastic dual in-line compatible thermal enhanced very SOT815-1 thin quad flat package; no leads; 24 terminals; body 3.5  5.5  0.85 mm 74LVCH8T245PW 74LVC8T245BQ 74LVCH8T245BQ 4. Functional diagram B1 B2 21 VCC(A) OE DIR Fig 1. B3 20 B4 19 B5 18 B6 17 B7 16 B8 15 14 VCC(B) 22 2 3 4 5 6 7 8 9 A1 A2 A3 A4 A5 A6 A7 10 A8 001aai472 Logic symbol 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 2 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state DIR OE A1 B1 VCC(B) VCC(A) to other seven channels Fig 2. 001aai473 Logic diagram (one channel) 5. Pinning information 5.1 Pinning terminal 1 index area 1 74LVC8T245 74LVCH8T245 24 VCC(B) VCC(A) 74LVC8T245 74LVCH8T245 DIR 2 23 VCC(B) VCC(A) 1 24 VCC(B) A1 3 22 OE DIR 2 23 VCC(B) A2 4 21 B1 A1 3 22 OE A3 5 20 B2 A2 4 21 B1 A4 6 19 B3 A3 5 20 B2 A5 7 18 B4 A4 6 19 B3 A6 8 17 B5 A5 7 18 B4 A7 9 A6 8 17 B5 A7 9 16 B6 A8 10 15 B7 GND 11 14 B8 GND 12 13 GND 16 B6 A8 10 15 B7 GND(1) GND 13 14 B8 GND 12 GND 11 001aak437 Transparent top view 001aak436 (1) This is not a supply pin, the substrate is attached to this pad using conductive die attach material. There is no electrical or mechanical requirement to solder this pad however if it is soldered the solder land should remain floating or be connected to GND. Fig 3. Pin configuration SOT355-1 (TSSOP24) 74LVC_LVCH8T245 Product data sheet Fig 4. Pin configuration SOT815-1 (DHVQFN24) All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 3 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 5.2 Pin description Table 2. Pin description Symbol Pin Description VCC(A) 1 supply voltage A (An inputs/outputs, OE and DIR inputs are referenced to VCC(A)) DIR 2 direction control A1 to A8 3, 4, 5, 6, 7, 8, 9, 10 data input or output GND[1] 11 ground (0 V) GND[1] 12 ground (0 V) GND[1] 13 ground (0 V) B1 to B8 21, 20, 19, 18, 17, 16, 15, 14 data input or output OE 22 output enable input (active LOW) VCC(B) 23 supply voltage B (Bn inputs/outputs are referenced to VCC(B)) VCC(B) 24 supply voltage B (Bn inputs/outputs are referenced to VCC(B)) [1] All GND pins must be connected to ground (0 V). 6. Functional description Table 3. Function table[1] Input/output[3] Supply voltage Input VCC(A), VCC(B) OE[2] DIR[2] An[2] Bn[2] 1.2 V to 5.5 V L L An = Bn input 1.2 V to 5.5 V L H input Bn = An 1.2 V to 5.5 V H X Z Z GND[3] X X Z Z [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state. [2] The An inputs/outputs, DIR and OE input circuit is referenced to VCC(A); The Bn inputs/outputs circuit is referenced to VCC(B). [3] If at least one of VCC(A) or VCC(B) is at GND level, the device goes into suspend mode. 7. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter VCC(A) Min Max Unit supply voltage A 0.5 +6.5 V VCC(B) supply voltage B 0.5 +6.5 V 50 - mA 0.5 +6.5 V IIK input clamping current VI input voltage IOK output clamping current VO output voltage Conditions VI < 0 V [1] 50 - mA [1][2][3] 0.5 VCCO + 0.5 V 0.5 +6.5 V - 50 mA - 100 mA VO < 0 V Active mode Suspend or 3-state mode [1] IO output current VO = 0 V to VCCO [2] ICC supply current ICC(A) or ICC(B); per VCC pin 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 4 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 4. Limiting values …continued In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit IGND ground current per GND pin 100 - mA Tstg storage temperature 65 +150 C - 500 mW Tamb = 40 C to +125 C total power dissipation Ptot [4] [1] The minimum input voltage ratings and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] VCCO is the supply voltage associated with the output port. [3] VCCO + 0.5 V should not exceed 6.5 V. [4] For TSSOP24 package: Ptot derates linearly at 5.5 mW/K above 60 C. For DHVQFN24 package: Ptot derates linearly at 4.5 mW/K above 60 C. 8. Recommended operating conditions Table 5. Recommended operating conditions Symbol Parameter Conditions VCC(A) supply voltage A VCC(B) supply voltage B 1.2 5.5 V VI input voltage 0 5.5 V VO output voltage 0 VCCO V 0 5.5 V Active mode [1] Suspend or 3-state mode Tamb ambient temperature t/V input transition rise and fall rate Min Max Unit 1.2 5.5 V 40 +125 C - 20 ns/V VCCI = 1.4 V to 1.95 V - 20 ns/V VCCI = 2.3 V to 2.7 V - 20 ns/V VCCI = 1.2 V [2] VCCI = 3 V to 3.6 V - 10 ns/V VCCI = 4.5 V to 5.5 V - 5 ns/V [1] VCCO is the supply voltage associated with the output port. [2] VCCI is the supply voltage associated with the input port. 9. Static characteristics Table 6. Typical static characteristics at Tamb = 25 C At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter VOH HIGH-level output voltage Conditions VI = VIH or VIL Min Typ Max Unit - 1.09 - V [1] [1] IO = 3 mA; VCCO = 1.2 V VOL LOW-level output voltage VI = VIH or VIL IO = 3 mA; VCCO = 1.2 V - 0.07 - V II input leakage current DIR, OE input; VI = 0 V to 5.5 V; VCCI = 1.2 V to 5.5 V [2] - - 1 A IBHL bus hold LOW current A or B port; VI = 0.42 V; VCCI = 1.2 V [2] - 19 - A A or B port; VI = 0.78 V; VCCI = 1.2 V [2] - 19 - A IBHH bus hold HIGH current 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 5 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 6. Typical static characteristics at Tamb = 25 C …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Typ Max Unit - 19 - A IBHLO bus hold LOW overdrive current A or B port; VCCI = 1.2 V [2][3] IBHHO bus hold HIGH overdrive current A or B port; VCCI = 1.2 V [2][3] - 19 - A IOZ OFF-state output current A or B port; VO = 0 V or VCCO; VCCO = 1.2 V to 5.5 V [1] - - 1 A suspend mode A port; VO = 0 V or VCCO; VCC(A) = 5.5 V; VCC(B) = 0 V [1] - - 1 A suspend mode B port; VO = 0 V or VCCO; VCC(A) = 0 V; VCC(B) = 5.5 V [1] - - 1 A A port; VI or VO = 0 V to 5.5 V; VCC(A) = 0 V; VCC(B) = 1.2 V to 5.5 V - - 1 A B port; VI or VO = 0 V to 5.5 V; VCC(B) = 0 V; VCC(A) = 1.2 V to 5.5 V - - 1 A IOFF power-off leakage current CI input capacitance DIR, OE input; VI = 0 V or 3.3 V; VCC(A) = 3.3 V - 3 - pF CI/O input/output capacitance A and B port; VO = 3.3 V or 0 V; VCC(A) = VCC(B) = 3.3 V - 6.5 - pF [1] VCCO is the supply voltage associated with the output port. [2] VCCI is the supply voltage associated with the data input port. [3] To guarantee the node switches, an external driver must source/sink at least IBHLO / IBHHO when the input is in the range VIL to VIH. Table 7. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter VIH HIGH-level input voltage 40 C to +85 C Conditions 40 C to +125 C Unit Min Max Min Max VCCI = 1.2 V 0.8VCCI - 0.8VCCI - V VCCI = 1.4 V to 1.95 V 0.65VCCI - 0.65VCCI - V [1] data input VCCI = 2.3 V to 2.7 V 1.7 - 1.7 - V VCCI = 3.0 V to 3.6 V 2.0 - 2.0 - V VCCI = 4.5 V to 5.5 V 0.7VCCI - 0.7VCCI - V DIR, OE input 74LVC_LVCH8T245 Product data sheet VCCI = 1.2 V 0.8VCC(A) - 0.8VCC(A) - V VCCI = 1.4 V to 1.95 V 0.65VCC(A) - 0.65VCC(A) - V VCCI = 2.3 V to 2.7 V 1.7 - 1.7 - V VCCI = 3.0 V to 3.6 V 2.0 - 2.0 - V VCCI = 4.5 V to 5.5 V 0.7VCC(A) - 0.7VCC(A) - V All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 6 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 7. Static characteristics …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter 40 C to +85 C Conditions Min VIL LOW-level input voltage 40 C to +125 C Max Min Unit Max [1] data input VCCI = 1.2 V - 0.2VCCI - 0.2VCCI V VCCI = 1.4 V to 1.95 V - 0.35VCCI - 0.35VCCI V VCCI = 2.3 V to 2.7 V - 0.7 - 0.7 V VCCI = 3.0 V to 3.6 V - 0.8 - 0.8 V VCCI = 4.5 V to 5.5 V - 0.3VCCI - 0.3VCCI V VCCI = 1.2 V - 0.2VCC(A) - 0.2VCC(A) V VCCI = 1.4 V to 1.95 V - 0.35VCC(A) - 0.35VCC(A) V DIR, OE input VOH HIGH-level output voltage VCCI = 2.3 V to 2.7 V - 0.7 - 0.7 V VCCI = 3.0 V to 3.6 V - 0.8 - 0.8 V VCCI = 4.5 V to 5.5 V - 0.3VCC(A) - VCCO  0.1 - VCCO  0.1 - V IO = 6 mA; VCCO = 1.4 V 1.0 - 1.0 - V IO = 8 mA; VCCO = 1.65 V 1.2 - 1.2 - V IO = 12 mA; VCCO = 2.3 V 1.9 - 1.9 - V IO = 24 mA; VCCO = 3.0 V 2.4 - 2.4 - V 3.8 - 3.8 - V IO = 100 A; VCCO = 1.2 V to 4.5 V - 0.1 - 0.1 V IO = 6 mA; VCCO = 1.4 V - 0.3 - 0.3 V IO = 8 mA; VCCO = 1.65 V - 0.45 - 0.45 V IO = 12 mA; VCCO = 2.3 V - 0.3 - 0.3 V IO = 24 mA; VCCO = 3.0 V - 0.55 - 0.55 V IO = 32 mA; VCCO = 4.5 V - 0.55 - 0.55 V - 2 - 10 A 15 - 10 - A 25 - 20 - A VI = VIH IO = 100 A; VCCO = 1.2 V to 4.5 V [2] IO = 32 mA; VCCO = 4.5 V VOL LOW-level output voltage [2] VI = VIL II input leakage current IBHL bus hold LOW A or B port current VI = 0.49 V; VCCI = 1.4 V DIR, OE input; VI = 0 V to 5.5 V; VCCI = 1.2 V to 5.5 V VI = 0.58 V; VCCI = 1.65 V 74LVC_LVCH8T245 Product data sheet 0.3VCC(A) V [1] VI = 0.70 V; VCCI = 2.3 V 45 - 45 - A VI = 0.80 V; VCCI = 3.0 V 100 - 80 - A VI = 1.35 V; VCCI = 4.5 V 100 - 100 - A All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 7 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 7. Static characteristics …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter IBHH 40 C to +85 C Conditions bus hold HIGH A or B port current VI = 0.91 V; VCCI = 1.4 V IOFF - 10 - A - 20 - A VI = 1.70 V; VCCI = 2.3 V 45 - 45 - A VI = 2.00 V; VCCI = 3.0 V 100 - 80 - A 100 - 100 - A 125 - 125 - A 200 - 200 - A VCCI = 2.7 V 300 - 300 - A VCCI = 3.6 V 500 - 500 - A 900 - 900 - A 125 - 125 - A 200 - 200 - A VCCI = 2.7 V 300 - 300 - A VCCI = 3.6 V 500 - 500 - A [1][3] [1][3] bus hold HIGH A or B port overdrive VCCI = 1.6 V current VCCI = 1.95 V power-off leakage current 74LVC_LVCH8T245 Product data sheet Max 25 bus hold LOW A or B port overdrive VCCI = 1.6 V current VCCI = 1.95 V OFF-state output current Min 15 900 - 900 - A A or B port; VO = 0 V or VCCO; VCCO = 1.2 V to 5.5 V [2] - 2 - 10 A suspend mode A port; VO = 0 V or VCCO; VCC(A) = 5.5 V; VCC(B) = 0 V [2] - 2 - 10 A suspend mode B port; VO = 0 V or VCCO; VCC(A) = 0 V; VCC(B) = 5.5 V [2] - 2 - 10 A A port; VI or VO = 0 V to 5.5 V; VCC(A) = 0 V; VCC(B) = 1.2 V to 5.5 V - 2 - 10 A B port; VI or VO = 0 V to 5.5 V; VCC(B) = 0 V; VCC(A) = 1.2 V to 5.5 V - 2 - 10 A VCCI = 5.5 V IOZ Max VI = 1.07 V; VCCI = 1.65 V VCCI = 5.5 V IBHHO Min Unit [1] VI = 3.15 V; VCCI = 4.5 V IBHLO 40 C to +125 C All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 8 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 7. Static characteristics …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter ICC supply current 40 C to +85 C Conditions 40 C to +125 C Unit Min Max Min Max VCC(A), VCC(B) = 1.2 V to 5.5 V - 15 - 20 A VCC(A) = 5.5 V; VCC(B) = 0 V - 15 - 20 A VCC(A) = 0 V; VCC(B) = 5.5 V 2 - 4 - A A port; VI = 0 V or VCCI; IO = 0 A [1] B port; VI = 0 V or VCCI; IO = 0 A - 15 - 20 A VCC(B) = 0 V; VCC(A) = 5.5 V 2 - 4 - A VCC(B) = 5.5 V; VCC(A) = 0 V - 15 - 20 A - 25 - 30 A - 50 - 75 A VCC(A), VCC(B) = 1.2 V to 5.5 V A plus B port (ICC(A) + ICC(B)); IO = 0 A; VI = 0 V or VCCI VCC(A), VCC(B) = 1.2 V to 5.5 V ICC additional per input; supply current VCC(A), VCC(B) = 3.0 V to 5.5 V DIR and OE input; DIR or OE input at VCC(A)  0.6 V; A port at VCC(A) or GND; B port = open A port; A port at VCC(A)  0.6 V; DIR at VCC(A); B port = open [4] - 50 - 75 A B port; B port at VCC(B)  0.6 V; DIR at GND; A port = open [4] - 50 - 75 A [1] VCCI is the supply voltage associated with the data input port. [2] VCCO is the supply voltage associated with the output port. [3] To guarantee the node switches, an external driver must source/sink at least IBHLO / IBHHO when the input is in the range VIL to VIH. [4] For non bus hold parts only (74LVC8T245). 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 9 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 10. Dynamic characteristics Table 8. Typical dynamic characteristics at VCC(A) = 1.2 V and Tamb = 25 C[1] Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7; for waveforms see Figure 5 and Figure 6. Symbol Parameter Conditions VCC(B) 1.2 V tpd tdis ten [1] propagation delay disable time enable time Unit 1.5 V 1.8 V 2.5 V 3.3 V 5.0 V An to Bn 11.0 8.5 7.4 6.2 5.7 5.4 ns Bn to An 11.0 10.0 9.5 9.1 8.9 8.9 ns OE to An 9.5 9.5 9.5 9.5 9.5 9.5 ns OE to Bn 10.2 8.2 7.8 6.7 7.3 6.4 ns OE to An 13.5 13.5 13.5 13.5 13.5 13.5 ns OE to Bn 13.6 10.3 8.9 7.5 7.1 7.0 ns tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH. Table 9. Typical dynamic characteristics at VCC(B) = 1.2 V and Tamb = 25 C[1] Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7; for waveforms see Figure 5 and Figure 6. Symbol Parameter tpd tdis ten [1] Conditions propagation delay disable time enable time VCC(A) 1.2 V 1.5 V 1.8 V An to Bn 11.0 10.0 9.5 Bn to An 11.0 8.5 7.3 OE to An 9.5 6.8 5.4 OE to Bn 10.2 9.1 8.6 Unit 2.5 V 3.3 V 5.0 V 9.1 8.9 8.8 ns 6.2 5.7 5.4 ns 3.8 4.1 3.1 ns 8.1 7.8 7.8 ns OE to An 13.5 9.0 6.9 4.8 3.8 3.2 ns OE to Bn 13.6 12.5 12.0 11.5 11.4 11.4 ns tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH. Table 10. Typical power dissipation capacitance at VCC(A) = VCC(B) and Tamb = 25 C[1][2] Voltages are referenced to GND (ground = 0 V). Symbol Parameter CPD [1] power dissipation capacitance Conditions VCC(A) and VCC(B) Unit 1.8 V 2.5 V 3.3 V 5.0 V A port: (direction A to B); B port: (direction B to A) 1 1 1 2 pF A port: (direction B to A); B port: (direction A to B) 13 13 13 13 pF CPD is used to determine the dynamic power dissipation (PD in W). PD = CPD  VCC2  fi  N + (CL  VCC2  fo) where: fi = input frequency in MHz; fo = output frequency in MHz; CL = load capacitance in pF; VCC = supply voltage in V; N = number of inputs switching; (CL  VCC2  fo) = sum of the outputs. [2] fi = 10 MHz; VI = GND to VCC; tr = tf = 1 ns; CL = 0 pF; RL =  . 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 10 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 11. Dynamic characteristics for temperature range 40 C to +85 C[1] Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7; for wave forms see Figure 5 and Figure 6. Symbol Parameter Conditions VCC(B) Unit 1.5 V  0.1 V 1.8 V  0.15 V 2.5 V  0.2 V 3.3 V  0.3 V 5.0 V  0.5 V Min Max Min Max Min Max Min Max Min Max 13 ns VCC(A) = 1.5 V  0.1 V tpd propagation delay An to Bn 1.7 27 1.7 23 1.3 18 1.0 15 0.8 Bn to An 0.9 27 0.9 25 0.8 23 0.7 23 0.7 22 ns tdis disable time OE to An 1.5 30 1.5 30 1.5 30 1.5 30 1.4 30 ns OE to Bn 2.4 34 2.4 33 1.9 15 1.7 14 1.3 12 ns OE to An 0.4 34 0.4 34 0.4 34 0.4 34 0.4 34 ns OE to Bn 1.8 36 1.8 34 1.5 18 1.2 15 0.9 13 ns An to Bn 1.7 25 1.7 21.9 1.3 9.2 1.0 7.4 0.8 7.1 ns Bn to An 0.9 23 0.9 23.8 0.8 23.6 0.7 23.4 0.7 23.4 ns ten enable time VCC(A) = 1.8 V  0.15 V tpd propagation delay OE to An 1.5 30 1.5 29.6 1.5 29.4 1.5 29.3 1.4 29.2 ns OE to Bn 2.4 33 2.4 32.2 1.9 13.1 1.7 12.0 1.3 10.3 ns OE to An 0.4 24 0.4 24.0 0.4 23.8 0.4 23.7 0.4 23.7 ns OE to Bn 1.8 34 1.8 32.0 1.5 16.0 1.2 12.6 0.9 10.8 ns propagation delay An to Bn 1.5 23 1.5 21.4 1.2 9.0 0.8 6.2 0.6 4.8 ns Bn to An 1.2 18 1.2 9.3 1.0 9.1 1.0 8.9 0.9 8.8 ns tdis disable time OE to An 1.4 9.0 1.4 9.0 1.4 9.0 1.4 9.0 1.4 9.0 ns ns ten enable time tdis ten disable time enable time VCC(A) = 2.5 V  0.2 V tpd OE to Bn 2.3 31 2.3 29.6 1.8 11.0 1.7 9.3 0.9 6.9 OE to An 1.0 10.9 1.0 10.9 1.0 10.9 1.0 10.9 1.0 10.9 ns OE to Bn 1.7 32 1.7 28.2 1.5 12.9 1.2 9.4 1.0 6.9 ns VCC(A) = 3.3 V  0.3 V tpd tdis ten propagation delay An to Bn 1.5 23 1.5 21.2 1.1 8.8 0.8 6.3 0.5 4.4 ns Bn to An 0.8 15 0.8 7.2 0.8 6.2 0.7 6.1 0.6 6.0 ns disable time OE to An 1.6 8.2 1.6 8.2 1.6 8.2 1.6 8.2 1.6 8.2 ns OE to Bn 2.1 30 2.1 29.0 1.7 10.3 1.5 8.6 0.8 6.3 ns enable time OE to An 0.8 8.1 0.8 8.1 0.8 8.1 0.8 8.1 0.8 8.1 ns OE to Bn 1.8 31 1.8 27.7 1.4 12.4 1.1 8.5 0.9 6.4 ns 22 1.5 21.4 1.0 8.8 0.7 6.0 0.4 4.2 ns VCC(A) = 5.0 V  0.5 V tpd propagation delay An to Bn 1.5 Bn to An 0.7 13 0.7 7.0 0.4 4.8 0.3 4.5 0.3 4.3 ns tdis disable time OE to An 0.3 5.4 0.3 5.4 0.3 5.4 0.3 5.4 0.3 5.4 ns OE to Bn 2.0 30 2.0 28.7 1.6 9.7 1.4 8.0 0.7 5.7 ns OE to An 0.7 6.4 0.7 6.4 0.7 6.4 0.7 6.4 0.7 6.4 ns OE to Bn 1.5 31 1.5 27.6 1.3 11.4 1.0 8.1 0.9 6.0 ns ten [1] enable time tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH. 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 11 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state Table 12. Dynamic characteristics for temperature range 40 C to +125 C[1] Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7; for wave forms see Figure 5 and Figure 6. Symbol Parameter Conditions VCC(B) Unit 1.5 V  0.1 V 1.8 V  0.15 V 2.5 V  0.2 V 3.3 V  0.3 V 5.0 V  0.5 V Min Max Min Max Min Max Min Max Min Max 16 ns VCC(A) = 1.5 V  0.1 V tpd propagation delay An to Bn 1.7 32 1.7 27 1.3 21 1.0 18 0.8 Bn to An 0.9 32 0.9 30 0.8 28 0.7 28 0.7 26 ns tdis disable time OE to An 1.5 34 1.5 34 1.5 34 1.5 34 1.4 34 ns OE to Bn 2.4 41 2.4 40 1.9 18 1.7 17 1.3 15 ns OE to An 0.4 40 0.4 40 0.4 40 0.4 40 0.4 40 ns OE to Bn 1.8 43 1.8 41 1.5 22 1.2 18 0.9 16 ns An to Bn 1.7 30 1.7 25.9 1.3 13.2 1.0 11.4 0.8 11.1 ns Bn to An 0.9 27 0.9 28.8 0.8 27.6 0.7 27.4 0.7 27.4 ns ten enable time VCC(A) = 1.8 V  0.15 V tpd propagation delay OE to An 1.5 34 1.5 33.6 1.5 33.4 1.5 33.3 1.4 33.2 ns OE to Bn 2.4 40 2.4 36.2 1.9 17.1 1.7 16.0 1.3 14.3 ns OE to An 0.4 28 0.4 28 0.4 27.8 0.4 27.7 0.4 27.7 ns OE to Bn 1.8 41 1.8 40 1.5 20 1.2 16.6 0.9 14.8 ns propagation delay An to Bn 1.5 28 1.5 25.4 1.2 13 0.8 10.2 0.6 8.8 Bn to An 1.2 23 1.2 13.3 1.0 13.1 1.0 12.9 0.9 12.8 ns tdis disable time OE to An 1.4 13 1.4 13 1.4 13 1.4 13 1.4 ten enable time tdis ten disable time enable time VCC(A) = 2.5 V  0.2 V tpd 13 ns ns OE to Bn 2.3 37 2.3 33.6 1.8 15 1.7 14.3 0.9 10.9 ns OE to An 1.0 17.2 1.0 17.2 1.0 17.3 1.0 17.2 1.0 17.3 ns OE to Bn 1.7 38 1.7 32.2 1.5 18.1 1.2 14.1 1.0 11.2 propagation delay An to Bn 1.5 28 1.5 25.2 1.1 12.8 0.8 10.3 0.5 10.4 ns Bn to An 0.8 18 0.8 11.2 0.8 10.2 0.7 10.1 0.6 disable time OE to An 1.6 12.2 1.6 12.2 1.6 12.2 1.6 12.2 1.6 12.2 ns OE to Bn 2.1 36 2.1 33 1.7 14.3 1.5 12.6 0.8 10.3 ns ns VCC(A) = 3.3 V  0.3 V tpd tdis ten enable time 10 ns OE to An 0.8 14.1 0.8 14.1 0.8 13.6 0.8 13.2 0.8 13.6 ns OE to Bn 1.8 37 1.8 31.7 1.4 18.4 1.1 12.9 0.9 10.9 ns 1.5 26 1.5 25.4 1.0 12.8 0.7 10 0.4 8.2 ns VCC(A) = 5.0 V  0.5 V tpd propagation delay An to Bn Bn to An 0.7 16 0.7 11 0.4 8.8 0.3 8.5 0.3 8.3 ns tdis disable time OE to An 0.3 9.4 0.3 9.4 0.3 9.4 0.3 9.4 0.3 9.4 ns OE to Bn 2.0 36 2.0 32.7 1.6 13.7 1.4 12 0.7 9.7 ns OE to An 0.7 10.9 0.7 10.9 0.7 10.9 0.7 10.9 0.7 10.9 ns OE to Bn 1.5 37 1.5 31.6 1.3 18.4 1.0 13.7 0.9 10.7 ns ten [1] enable time tpd is the same as tPLH and tPHL; tdis is the same as tPLZ and tPHZ; ten is the same as tPZL and tPZH. 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 12 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 11. Waveforms VI VM An, Bn input GND tPHL tPLH VOH VM Bn, An output VOL 001aai475 Measurement points are given in Table 13. VOL and VOH are typical output voltage levels that occur with the output load. Fig 5. The data input (An, Bn) to output (Bn, An) propagation delay times VI OE input VM GND tPLZ tPZL VCCO output LOW-to-OFF OFF-to-LOW VM VX VOL tPZH tPHZ VOH VY output HIGH-to-OFF OFF-to-HIGH VM GND outputs enabled outputs enabled outputs disabled 001aai474 Measurement points are given in Table 13. VOL and VOH are typical output voltage levels that occur with the output load. Fig 6. Enable and disable times Table 13. Measurement points Supply voltage Input[1] Output[2] VCC(A), VCC(B) VM VM VX VY 1.2 V to 1.6 V 0.5VCCI 0.5VCCO VOL + 0.1 V VOH  0.1 V 1.65 V to 2.7 V 0.5VCCI 0.5VCCO VOL + 0.15 V VOH  0.15 V 3.0 V to 5.5 V 0.5VCCI 0.5VCCO VOL + 0.3 V VOH  0.3 V [1] VCCI is the supply voltage associated with the data input port. [2] VCCO is the supply voltage associated with the output port. 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 13 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state tW VI 90 % negative pulse VM VM 10 % 0V tf tr tr tf VI 90 % positive pulse VM VM 10 % 0V tW VEXT VCC VI RL VO G DUT RT RL CL 001aae331 Test data is given in Table 14. RL = Load resistance. CL = Load capacitance including jig and probe capacitance. RT = Termination resistance. VEXT = External voltage for measuring switching times. Fig 7. Load circuitry for switching times Table 14. Test data Supply voltage Input VCC(A), VCC(B) VI[1] t/V[2] Load CL RL tPLH, tPHL tPZH, tPHZ tPZL, tPLZ[3] 1.2 V to 5.5 V VCCI  1.0 ns/V 15 pF 2 k open GND 2VCCO [1] VCCI is the supply voltage associated with the data input port. [2] dV/dt  1.0 V/ns. [3] VCCO is the supply voltage associated with the output port. 74LVC_LVCH8T245 Product data sheet VEXT All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 14 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 12. Typical propagation delay characteristics 001aal268 14 tPHL (ns) 12 (1) 10 001aal269 14 tPLH (ns) 12 (1) 10 (2) (3) (4) (5) (6) 8 6 (2) (3) 8 (4) (5) (6) 6 4 4 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 a. HIGH to LOW propagation delay (A to B) 001aal270 14 tPHL (ns) 12 (1) (2) (3) (4) (5) (6) 10 0 10 15 20 25 30 CL (pF) 35 b. LOW to HIGH propagation delay (A to B) 001aal271 14 tPLH (ns) 12 (1) (2) (3) (4) (5) (6) 10 8 8 6 6 4 4 2 2 0 5 0 0 5 10 15 20 25 30 CL (pF) 35 c. HIGH to LOW propagation delay (B to A) 0 5 10 15 20 25 30 CL (pF) 35 d. LOW to HIGH propagation delay (B to A) (1) VCC(B) = 1.2 V. (2) VCC(B) = 1.5 V. (3) VCC(B) = 1.8 V. (4) VCC(B) = 2.5 V. (5) VCC(B) = 3.3 V. (6) VCC(B) = 5.0 V. Fig 8. Typical propagation delay versus load capacitance; Tamb = 25 C; VCC(A) = 1.2 V 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 15 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 001aal272 14 tPHL (ns) 12 001aal273 14 tPLH (ns) 12 (1) (1) 10 10 (2) (2) 8 8 (3) (4) (5) (6) 6 (3) (4) (5) (6) 6 4 4 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 a. HIGH to LOW propagation delay (A to B) 001aal274 14 tPHL (ns) 12 10 6 5 10 15 20 25 30 CL (pF) 35 b. LOW to HIGH propagation delay (A to B) 001aal275 14 tPLH (ns) 12 10 (1) (2) (3) (4) (5) (6) 8 0 (1) (2) (3) (4) (5) (6) 8 6 4 4 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 c. HIGH to LOW propagation delay (B to A) 0 5 10 15 20 25 30 CL (pF) 35 d. LOW to HIGH propagation delay (B to A) (1) VCC(B) = 1.2 V. (2) VCC(B) = 1.5 V. (3) VCC(B) = 1.8 V. (4) VCC(B) = 2.5 V. (5) VCC(B) = 3.3 V. (6) VCC(B) = 5.0 V. Fig 9. Typical propagation delay versus load capacitance; Tamb = 25 C; VCC(A) = 1.5 V 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 16 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 001aal276 14 tPHL (ns) 12 001aal277 14 tPLH (ns) 12 (1) (1) 10 10 8 (2) 8 (2) (3) (3) 6 6 (4) (5) (6) 4 4 2 2 0 (4) (5) (6) 0 0 5 10 15 20 25 30 CL (pF) 35 a. HIGH to LOW propagation delay (A to B) 001aal278 14 tPHL (ns) 12 10 0 5 10 15 20 25 8 6 35 b. LOW to HIGH propagation delay (A to B) 001aal279 14 tPLH (ns) 12 10 (1) (2) (3) (4) (5) (6) 30 CL (pF) (1) (2) (3) (4) (5) (6) 8 6 4 4 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 c. HIGH to LOW propagation delay (B to A) 0 5 10 15 20 25 30 CL (pF) 35 d. LOW to HIGH propagation delay (B to A) (1) VCC(B) = 1.2 V. (2) VCC(B) = 1.5 V. (3) VCC(B) = 1.8 V. (4) VCC(B) = 2.5 V. (5) VCC(B) = 3.3 V. (6) VCC(B) = 5.0 V. Fig 10. Typical propagation delay versus load capacitance; Tamb = 25 C; VCC(A) = 1.8 V 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 17 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 001aal280 14 tPHL (ns) 12 (1) (1) 10 001aal281 14 tPLH (ns) 12 10 8 8 (2) (2) 6 (3) 6 4 (4) (5) (6) 4 2 (3) (4) (5) (6) 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 a. HIGH to LOW propagation delay (A to B) 001aal282 14 tPHL (ns) 12 10 0 5 10 15 20 25 30 CL (pF) 35 b. LOW to HIGH propagation delay (A to B) 001aal283 14 tPLH (ns) 12 10 8 8 (1) (2) (3) (4) (5) (6) 6 4 (1) (2) (3) (4) (5) (6) 6 4 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 c. HIGH to LOW propagation delay (B to A) 0 5 10 15 20 25 30 CL (pF) 35 d. LOW to HIGH propagation delay (B to A) (1) VCC(B) = 1.2 V. (2) VCC(B) = 1.5 V. (3) VCC(B) = 1.8 V. (4) VCC(B) = 2.5 V. (5) VCC(B) = 3.3 V. (6) VCC(B) = 5.0 V. Fig 11. Typical propagation delay versus load capacitance; Tamb = 25 C; VCC(A) = 2.5 V 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 18 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 001aal284 14 tPHL (ns) 12 (1) 10 001aal285 14 tPLH (ns) 12 (1) 10 8 8 (2) (2) 6 (3) 6 (3) 4 (4) (5) (6) 4 (4) (5) (6) 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 a. HIGH to LOW propagation delay (A to B) 001aal286 14 tPHL (ns) 12 10 0 5 10 15 20 25 30 CL (pF) 35 b. LOW to HIGH propagation delay (A to B) 001aal287 14 tPLH (ns) 12 10 8 8 (1) (2) (3) (4) (5) (6) 6 4 (1) (2) (3) (4) (5) (6) 6 4 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 c. HIGH to LOW propagation delay (B to A) 0 5 10 15 20 25 30 CL (pF) 35 d. LOW to HIGH propagation delay (B to A) (1) VCC(B) = 1.2 V. (2) VCC(B) = 1.5 V. (3) VCC(B) = 1.8 V. (4) VCC(B) = 2.5 V. (5) VCC(B) = 3.3 V. (6) VCC(B) = 5.0 V. Fig 12. Typical propagation delay versus load capacitance; Tamb = 25 C; VCC(A) = 3.3 V 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 19 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 001aal288 14 tPHL (ns) 12 (1) 10 001aal289 14 tPLH (ns) 12 (1) 10 8 8 (2) (2) 6 (3) 6 (3) 4 (4) (5) (6) 4 (4) (5) (6) 2 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 a. HIGH to LOW propagation delay (A to B) 001aal290 14 tPHL (ns) 12 0 8 8 4 15 20 25 35 (1) (2) (3) (4) (5) (6) 6 4 2 30 CL (pF) 001aal291 14 tPLH (ns) 12 10 (1) (2) (3) (4) (5) (6) 10 b. LOW to HIGH propagation delay (A to B) 10 6 5 2 0 0 0 5 10 15 20 25 30 CL (pF) 35 c. HIGH to LOW propagation delay (B to A) 0 5 10 15 20 25 30 CL (pF) 35 d. LOW to HIGH propagation delay (B to A) (1) VCC(B) = 1.2 V. (2) VCC(B) = 1.5 V. (3) VCC(B) = 1.8 V. (4) VCC(B) = 2.5 V. (5) VCC(B) = 3.3 V. (6) VCC(B) = 5.0 V. Fig 13. Typical propagation delay versus load capacitance; Tamb = 25 C; VCC(A) = 5 V 74LVC_LVCH8T245 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 20 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 13. Application information 13.1 Unidirectional logic level-shifting application The circuit given in Figure 14 is an example of the 74LVC8T245; 74LVCH8T245 being used in an unidirectional logic level-shifting application. VCC1 VCC1 VCC(A) GND An VCC(B) 74LVC8T245 74LVCH8T245 DIR VCC2 VCC2 Bn OE system-1 system-2 001aak438 Schematic given for one channel. Fig 14. Unidirectional logic level-shifting application Table 15. 74LVC_LVCH8T245 Product data sheet Description unidirectional logic level-shifting application Name Function Description VCC(A) VCC1 supply voltage of system-1 (1.2 V to 5.5 V) GND GND device GND A OUT output level depends on VCC1 voltage B IN input threshold value depends on VCC2 voltage DIR DIR the GND (LOW level) determines B port to A port direction VCC(B) VCC2 supply voltage of system-2 (1.2 V to 5.5 V) OE OE The GND (LOW level) enables the output ports All information provided in this document is subject to legal disclaimers. Rev. 3 — 12 December 2011 © NXP B.V. 2011. All rights reserved. 21 of 28 74LVC8T245; 74LVCH8T245 NXP Semiconductors 8-bit dual supply translating transceiver; 3-state 13.2 Bidirectional logic level-shifting application Figure 15 shows the 74LVC8T245; 74LVCH8T245 being used in a bidirectional logic level-shifting application. VCC1 VCC1 VCC2 VCC2 VCC(B) VCC(A) I/O-1 I/O-2 PULL-UP/DOWN GND A 74LVC8T245 74LVCH8T245 DIR PULL-UP/DOWN B OE OE DIR CTRL system-1 system-2 001aak439 Schematic given for one channel. Pull-up or pull-down only needed for 74LVC8T245. Fig 15. Bidirectional logic level-shifting application Table 16 gives a sequence that will illustrate data transmission from system-1 to system-2 and then from system-2 to system-1. Table 16. Description bidirectional logic level-shifting application[1] State DIR CTRL OE I/O-1 I/O-2 Description 1 H L output input system-1 data to system-2 2 H H Z Z system-2 is getting ready to send data to system-1. I/O-1 and I/O-2 are disabled. The bus-line state depends on bus hold. 3 L H Z Z DIR bit is set LOW. I/O-1 and I/O-2 still are disabled. The bus-line state depends on bus hold. 4 L L input output system-2 data to system-1 [1] H = HIGH voltage level; L = LOW voltage level; Z = high-impedance OFF-state. 13.3 Power-up considerations The device is designed such that no special power-up sequence is required other than GND being applied first. Table 17. VCC(A) 74LVC_LVCH8T245 Product data sheet Typical total supply current (ICC(A) + ICC(B)) VCC(B) Unit 0V 1.8 V 2.5 V 3.3 V 5.0 V 0V 0