74HC244; 74HCT244 Octal buffer/line driver; 3-state Rev. 5 -- 26 February 2016 Product data sheet 1. General description The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits Input levels: For 74HC244: CMOS level For 74HCT244: TTL level Octal bus interface Non-inverting 3-state outputs Complies with JEDEC standard no. 7 A ESD protection: HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V 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 74HC244D Package Temperature range Name Description Version 40 C to +125 C SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 40 C to +125 C SSOP20 plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1 40 C to +125 C TSSOP20 plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1 40 C to +125 C DHVQFN20 plastic dual-in-line compatible thermal enhanced SOT764-1 very thin quad flat package; no leads; 20 terminals; body 2.5 4.5 0.85 mm 74HCT244D 74HC244DB 74HCT244DB 74HC244PW 74HCT244PW 74HC244BQ 74HCT244BQ 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state 4. Functional diagram $ < $ < $ < $ < 2( $ < $ < $ < $ < 2( PQD Fig 1. Functional diagram $ $ < $ < $ < < $ $ 2( < $ < $ 2( (1 < < (1 PQD Fig 2. Logic symbol 74HC_HCT244 Product data sheet PQD Fig 3. IEC logic symbol All information provided in this document is subject to legal disclaimers. Rev. 5 -- 26 February 2016 (c) NXP Semiconductors N.V. 2016. All rights reserved. 2 of 17 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state 5. Pinning information 5.1 Pinning WHUPLQDO LQGH[DUHD +& +&7 9&& 2( +& +&7 $ 2( < < $ $ 2( 9&& $ 2( < < < < $ $ $ $ < < < $ $ $ < < $ $ < < < *1' $ < *1' $ $ *1' < DDH 7UDQVSDUHQWWRSYLHZ DDH (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 4. Pin configuration SO20, (T)SSOP20 Fig 5. Pin configuration DHVQFN20 5.2 Pin description Table 2. Pin description Symbol Pin Description 1OE, 2OE 1, 19 output enable input (active LOW) 1A0, 1A1, 1A2, 1A3 2, 4, 6, 8 data input 2Y0, 2Y1, 2Y2, 2Y3 3, 5, 7, 9 bus output GND 10 ground (0 V) 2A0, 2A1, 2A2, 2A3 17, 15, 13, 11 data input 1Y0, 1Y1, 1Y2, 1Y3 18, 16, 14, 12 bus output VCC 20 supply voltage 74HC_HCT244 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 26 February 2016 (c) NXP Semiconductors N.V. 2016. All rights reserved. 3 of 17 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state 6. Functional description Table 3. Function table[1] Input Output nOE nAn nYn L L L L H H H X Z [1] H = HIGH voltage level; L = LOW voltage level; X = don't care; Z = high-impedance OFF-state. 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 supply voltage IIK input clamping current VI < 0.5 V or VI > VCC + 0.5 V - 20 mA IOK output clamping current VO < 0.5 V or VO > VCC + 0.5 V - 20 mA IO output current 0.5 V < VO < VCC + 0.5 V - 35 mA ICC supply current - 70 mA IGND ground current 70 - mA Tstg storage temperature 65 +150 C - 500 mW total power dissipation Ptot [1] Conditions Min Max 0.5 +7 [1] SO20, SSOP20, TSSOP20 and DHVQFN20 packages Unit V For SO20 packages: Ptot derates linearly with 8 mW/K above 70 C. For SSOP20 and TSSOP20 packages: Ptot derates linearly with 5.5 mW/K above 60 C. For DHVQFN20 packages: above 60 C, Ptot derates linearly with 4.5 mW/K. 8. Recommended operating conditions Table 5. Symbol Recommended operating conditions Parameter Conditions Min Typ Max Unit 2.0 5.0 6.0 V 74HC244 VCC supply voltage VI input voltage 0 - VCC V VO output voltage 0 - VCC V t/V input transition rise and fall rate VCC = 2.0 V - - 625 ns/V VCC = 4.5 V - 1.67 139 ns/V VCC = 6.0 V - - 83 ns/V 40 - +125 Tamb ambient temperature 74HC_HCT244 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 26 February 2016 C (c) NXP Semiconductors N.V. 2016. All rights reserved. 4 of 17 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state Table 5. Recommended operating conditions ...continued Symbol Parameter Conditions Min Typ Max Unit 4.5 5.0 5.5 V - VCC V 74HCT244 VCC supply voltage VI input voltage 0 VO output voltage 0 - VCC V t/V input transition rise and fall rate VCC = 4.5 V - 1.67 139 ns/V Tamb ambient temperature 40 - +125 C 9. Static characteristics Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V HIGH-level VI = VIH or VIL output voltage IO = 20 A; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V IO = 20 A; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V IO = 20 A; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V IO = 6.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V IO = 7.8 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V 74HC244 VIH VIL VOH VOL HIGH-level input voltage LOW-level input voltage LOW-level VI = VIH or VIL output voltage IO = 20 A; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V IO = 20 A; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V IO = 6.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V IO = 7.8 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V II input leakage current VI = VCC or GND; VCC = 6.0 V - - 0.1 - 1.0 - 1.0 A IOZ OFF-state output current VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND - - 0.5 - 5.0 - 10 A ICC supply current VI = VCC or GND; IO = 0 A; VCC = 6.0 V - - 8.0 - 80 - 160 A CI input capacitance - 3.5 - - - - - pF 74HC_HCT244 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 26 February 2016 (c) NXP Semiconductors N.V. 2016. All rights reserved. 5 of 17 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state Table 6. Static characteristics ...continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter 25 C Conditions 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max 74HCT244 VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V VIL LOW-level input voltage VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V VOH HIGH-level VI = VIH or VIL; VCC = 4.5 V output voltage IO = 20 A 4.4 4.5 - 4.4 - 4.4 - V 3.98 4.32 - 3.84 - 3.7 - V IO = 6 mA VOL LOW-level VI = VIH or VIL; VCC = 4.5 V output voltage IO = 20 A - 0 0.1 - 0.1 - 0.1 V IO = 6.0 mA - 0.16 0.26 - 0.33 - 0.4 V II input leakage current VI = VCC or GND; VCC = 5.5 V - - 0.1 - 1.0 - 1.0 A IOZ OFF-state output current VI = VIH or VIL; VCC = 5.5 V; VO = VCC or GND - - 0.5 - 5.0 - 10 A ICC supply current VI = VCC or GND; VCC = 5.5 V; IO = 0 A - - 8.0 - 80 - 160 A ICC additional per input pin; supply current VI = VCC 2.1 V; other inputs at VCC or GND; VCC = 4.5 V to 5.5 V; IO = 0 A - 70 252 - 315 - 343 A CI input capacitance - 3.5 - - - - - pF 10. Dynamic characteristics Table 7. Dynamic characteristics GND = 0 V; for load circuit see Figure 8. Symbol Parameter 25 C Conditions 40 C to +125 C Unit Min Typ Max Max (85 C) Max (125 C) VCC = 2.0 V - 30 110 145 165 ns VCC = 4.5 V - 11 22 28 33 ns VCC = 5.0 V; CL = 15 pF - 9 - - - ns VCC = 6.0 V - 9 19 24 28 ns VCC = 2.0 V - 36 150 190 225 ns VCC = 4.5 V - 13 30 38 45 ns VCC = 6.0 V - 10 26 33 38 ns 74HC244 tpd [1] propagation delay nAn to nYn; see Figure 6 ten enable time 74HC_HCT244 Product data sheet nOE to nYn; see Figure 7 [2] All information provided in this document is subject to legal disclaimers. Rev. 5 -- 26 February 2016 (c) NXP Semiconductors N.V. 2016. All rights reserved. 6 of 17 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state Table 7. Dynamic characteristics ...continued GND = 0 V; for load circuit see Figure 8. Symbol Parameter tdis disable time 25 C Conditions Min Typ Max Max (85 C) Max (125 C) VCC = 2.0 V - 39 150 190 225 ns VCC = 4.5 V - 14 30 38 45 ns - 11 26 33 38 ns VCC = 2.0 V - 14 60 75 90 ns VCC = 4.5 V - 5 12 15 18 ns - 4 10 13 15 ns - 35 - - - pF - 13 22 28 33 ns nOE to nYn or see Figure 7 [3] VCC = 6.0 V transition time tt [4] see Figure 6 VCC = 6.0 V power dissipation capacitance CPD 40 C to +125 C Unit per buffer; VI = GND to VCC [5] 74HCT244 [1] propagation delay nAn to nYn; tpd see Figure 6 VCC = 4.5 V VCC = 5.0 V; CL = 15 pF - 11 - - - ns - 15 30 38 45 ns 15 25 31 38 ns ten enable time nOE to nYn; VCC = 4.5 V; see Figure 7 [2] tdis disable time nOE to nYn; VCC = 4.5 V; see Figure 7 [3] - tt transition time VCC = 4.5 V; see Figure 6 [4] - 5 12 15 18 ns CPD power dissipation capacitance per buffer; VI = GND to VCC 1.5 V [5] - 35 - - - pF [1] tpd is the same as tPHL and tPLH. [2] ten is the same as tPZH and tPZL. [3] tdis is the same as tPHZ and tPLZ. [4] tt is the same as tTHL and tTLH. [5] 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 = output load capacitance in pF; VCC = supply voltage in V; N = number of inputs switching; (CL VCC2 fo) = sum of outputs. 74HC_HCT244 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 5 -- 26 February 2016 (c) NXP Semiconductors N.V. 2016. All rights reserved. 7 of 17 74HC244; 74HCT244 NXP Semiconductors Octal buffer/line driver; 3-state 11. Waveforms 9, 90 Q$QLQSXW 90 *1' W 3+/ 92+ W 3/+ 90 90 Q