Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsLogic ICsLogic IC - Buffer, driver SO 20

1. General description

The 74AHC240 and 74AHCT240 are 8-bit inverting buffer/line drivers with 3-state outputs.

These devices can be used as two 4-bit buffers or one 8-bit buffer. They feature 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 are over voltage

tolerant. This feature allows the use of these devices as translators in mixed voltage

environments.

2. Features and benefits

 Balanced propagation delays

 All inputs have a Schmitt-trigger action

 Inputs accepts voltages higher than V

 For 74AHC240 only: operates with CMOS input levels

 For 74AHCT240 only: operates with TTL input levels

 ESD protection:

 HBM JESD22-A114F exceeds 2000 V

 CDM JESD22-C101D exceeds 1000 V

 Multiple package options

 Specified from 40 C to +85 C and from 40 C to +125 C

3. Ordering information

74AHC240; 74AHCT240

Octal buffer/line driver; inverting; 3-state

Rev. 4 — 25 September 2013 Product data sheet

Table 1. Ordering information

Type number Package

Temperature range Name Description Version

74AHC240D 40 C to +125 C SO20 plastic small outline package; 20 leads;

body width 7.5 mm

SOT163-1

74AHCT240D

74AHC240PW 40 C to +125 C TSSOP20 plastic thin shrink small outline package; 20 leads;

body width 4.4 mm

SOT360-1

74AHCT240PW

74AHC240BQ 40 C to +125 C DHVQFN20 plastic dual in-line compatible thermal enhanced

very thin quad flat package; no leads; 20 terminals;

body 2.5  4.5  0.85 mm

SOT764-1

74AHCT240BQ

Summary of content (16 pages)

PAGE 1
74AHC240; 74AHCT240 Octal buffer/line driver; inverting; 3-state Rev. 4 — 25 September 2013 Product data sheet 1. General description The 74AHC240 and 74AHCT240 are 8-bit inverting buffer/line drivers with 3-state outputs. These devices can be used as two 4-bit buffers or one 8-bit buffer. They feature 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 are over voltage tolerant.
PAGE 2
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 4. Functional diagram 1 2 1A0 17 2A0 1Y0 18 2Y0 3 4 1A1 15 2A1 1Y1 16 2Y1 5 6 1A2 1Y2 14 13 2A2 2Y2 8 1A3 11 2A3 1Y3 12 2Y3 9 1 1OE 19 2OE 2 18 4 16 6 14 8 12 19 Fig 1. 7 EN EN 11 9 13 7 15 5 17 3 mgu779 mgu778 Logic symbol Fig 2. IEC logic symbol 5. Pinning information 5.
PAGE 3
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 5.2 Pin description Table 2. Pin description Symbol Pin Description 1OE 1 output enable input (active LOW) 2OE 19 output enable input (active LOW) 1A0, 1A1, 1A2, 1A3 2, 4, 6, 8 data input 2A0, 2A1, 2A2, 2A3 17, 15, 13, 11 data input 1Y0, 1Y1, 1Y2, 1Y3 18, 16, 14, 12 data output 2Y0, 2Y1, 2Y2, 2Y3 3, 5, 7, 9 data output GND 10 ground (0 V) VCC 20 power supply 6. Functional description Table 3.
PAGE 4
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 8. Recommended operating conditions Table 5. Recommended operating conditions Symbol Parameter Conditions Min Typ Max Unit 2.0 5.0 5.5 V 74AHC240 VCC supply voltage VI input voltage 0 - 5.5 V VO output voltage 0 - VCC V Tamb ambient temperature 40 +25 +125 C t/V input transition rise and fall rate VCC = 3.3 V  0.3 V - - 100 ns/V VCC = 5 V  0.
PAGE 5
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 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 II input leakage current VI = 5.5 V or GND; VCC = 0 V to 5.5 V - - 0.1 - 1.0 - 2.0 A IOZ OFF-state VI = VIH or VIL; output current VO = VCC or GND; VCC = 5.5 V - - 0.
PAGE 6
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 10. Dynamic characteristics Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7. Symbol Parameter 25 C Conditions 40 C to +125 C Min Typ[1] Max Min Max (85 C) Max (125 C) - 3.9 7.5 1.0 8.6 10.8 Unit 74AHC240 tpd propagation delay nAn to nYn; see Figure 5 [2] VCC = 3.0 V to 3.6 V; CL = 15 pF VCC = 3.0 V to 3.6 V; CL = 50 pF - 5.8 11.
PAGE 7
4AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state Table 7. Dynamic characteristics …continued Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7. Symbol Parameter 25 C Conditions 40 C to +125 C Unit Min Typ[1] Max Min Max (85 C) Max (125 C) - 3.0 5.8 1.0 6.8 8.5 ns - 4.4 8.4 1.0 9.5 11.9 ns - 3.4 7.5 1.0 9.0 14.4 ns - 4.5 9.5 1.0 11.5 14.
PAGE 8
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state VI nOE input VM GND t PLZ t PZL VCC nYn output LOW-to-OFF OFF-to-LOW VM VX VOL t PZH t PHZ VOH VY nYn output HIGH-to-OFF OFF-to-HIGH VM GND outputs enabled outputs disabled outputs enabled 001aae014 Measurement points are given in Table 8. VOL and VOH are typical voltage output drop that occur with the output load. Fig 6. Enable and disable times Table 8.
PAGE 9
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state VI tW 90 % negative pulse VM 0V tf tr tr tf VI 90 % positive pulse 0V VM 10 % VM VM 10 % tW VCC VCC G VI VO RL S1 open DUT CL RT 001aad983 Test data is given in Table 9. Definitions test circuit: RT = Termination resistance should be equal to output impedance Zo of the pulse generator. CL = Load capacitance including jig and probe capacitance. RL = Load resistance. S1 = Test selection switch.
PAGE 10
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 12. Package outline SO20: plastic small outline package; 20 leads; body width 7.5 mm SOT163-1 D E A X c HE y v M A Z 20 11 Q A2 A (A 3) A1 pin 1 index θ Lp L 10 1 e bp detail X w M 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y mm 2.65 0.3 0.1 2.45 2.25 0.25 0.49 0.36 0.32 0.
PAGE 11
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm SOT360-1 E D A X c HE y v M A Z 11 20 Q A2 (A 3) A1 pin 1 index A θ Lp L 1 10 e detail X w M bp 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (2) e HE L Lp Q v w y Z (1) θ mm 1.1 0.15 0.05 0.95 0.80 0.25 0.30 0.19 0.2 0.1 6.6 6.4 4.5 4.3 0.
PAGE 12
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state DHVQFN20: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; SOT764-1 20 terminals; body 2.5 x 4.5 x 0.85 mm A B D A A1 E c detail X terminal 1 index area terminal 1 index area C e1 e 2 9 y y1 C v M C A B w M C b L 1 10 Eh e 20 11 19 12 Dh X 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A(1) max.
PAGE 13
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 13. Abbreviations Table 10. Abbreviations Acronym Description CDM Charge Device Model CMOS Complementary Metal Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model TTL Transistor-Transistor Logic 14. Revision history Table 11. Revision history Document ID Release date 74AHC_AHCT240 v.
PAGE 14
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state 15. Legal information 15.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
PAGE 15
74AHC240; 74AHCT240 NXP Semiconductors Octal buffer/line driver; inverting; 3-state Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities. Non-automotive qualified products — Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the product is not suitable for automotive use.
PAGE 16
NXP Semiconductors 74AHC240; 74AHCT240 Octal buffer/line driver; inverting; 3-state 17. Contents 1 2 3 4 5 5.1 5.2 6 7 8 9 10 11 12 13 14 15 15.1 15.2 15.3 15.4 16 17 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 1 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 2 Pinning . . . .