Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsLogic ICsLogic IC - Buffer, driver SO 20

1. General description

The 74AHC244; 74AHCT244 is a high-speed Si-gate CMOS device.

The 74AHC244; 74AHCT244 has octal non-inverting buffer/line drivers with 3-state

outputs. The 3-state outputs are controlled by the output enable inputs (nOE). A HIGH on

nOE causes the outputs to assume a high-impedance OFF-state.

2. Features

■ Balanced propagation delays

■ All inputs have a Schmitt-trigger action

■ Inputs accepts voltages higher than V

■ For 74AHC244 only: operates with CMOS input levels

■ For 74AHCT244 only: operates with TTL input levels

■ ESD protection:

◆ HBM JESD22-A114E exceeds 2000 V

◆ MM JESD22-A115-A exceeds 200 V

◆ CDM JESD22-C101C exceeds 1000 V

■ Multiple package options

■ Speciﬁed from −40 °C to +85 °C and from −40 °C to +125 °C

3. Ordering information

74AHC244; 74AHCT244

Octal buffer/line driver; 3-state

Rev. 05 — 20 December 2007 Product data sheet

Table 1. Ordering information

Type number Package

Temperature range Name Description Version

74AHC244D −40 °C to +125 °C SO20 plastic small outline package; 20 leads;

body width 7.5 mm

SOT163-1

74AHCT244D

74AHC244PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;

body width 4.4 mm

SOT360-1

74AHCT244PW

74AHC244BQ −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

74AHCT244BQ

Summary of content (16 pages)

PAGE 1
74AHC244; 74AHCT244 Octal buffer/line driver; 3-state Rev. 05 — 20 December 2007 Product data sheet 1. General description The 74AHC244; 74AHCT244 is a high-speed Si-gate CMOS device. The 74AHC244; 74AHCT244 has octal non-inverting buffer/line drivers with 3-state outputs. The 3-state outputs are controlled by the output enable inputs (nOE). A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. 2.
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74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state 4. Functional diagram 2 4 6 8 1 17 15 13 11 19 1A0 1Y0 1A1 1Y1 1A2 1Y2 1A3 1Y3 18 16 14 12 1OE 2A0 2Y0 2A1 2Y1 2A2 2Y2 2A3 2Y3 3 5 7 9 2OE mna170 Fig 1.
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74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state 5. Pinning information 5.
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74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state 6. Functional description Table 3. Function table[1] Control Input Output nOE nAn nYn 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).
PAGE 5
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state 8. Recommended operating conditions Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions 74AHC244 74AHCT244 Unit Min Typ Max Min Typ Max VCC supply voltage 2.0 5.0 5.5 4.5 5.0 5.5 V VI input voltage 0 - 5.5 0 - 5.
PAGE 6
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state Table 6. Static characteristics …continued 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 CI input capacitance - 3.0 10 - 10 - 10 pF CO output capacitance - 4.0 - - - - - pF For type 74AHCT244 VIH HIGH-level input voltage VCC = 4.5 V to 5.5 V 2.0 - - 2.0 - 2.
PAGE 7
4AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state 10. Dynamic characteristics Table 7. Dynamic characteristics GND = 0 V. For test circuit see Figure 8. Symbol Parameter 25 °C Conditions −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Min Max CL = 15 pF - 5.0 8.4 1.0 10.0 1.0 10.5 ns CL = 50 pF - 7.0 11.9 1.0 13.5 1.0 15.0 ns - 3.4 5.5 1.0 6.5 1.0 7.0 ns 5.0 7.5 1.0 8.5 1.0 9.
PAGE 8
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 3-state Table 7. Dynamic characteristics …continued GND = 0 V. For test circuit see Figure 8. Symbol Parameter 25 °C Conditions −40 °C to +85 °C −40 °C to +125 °C Unit Min Typ[1] Max Min Max Min Max CL = 15 pF - 3.5 7.4 1.0 8.5 1.0 9.5 ns CL = 50 pF - 5.0 8.4 1.0 9.5 1.0 10.5 ns - 3.5 10.4 1.0 12.0 1.0 13.0 ns - 5.5 11.4 1.0 13.0 1.0 14.5 ns - 5.0 9.4 1.0 10.0 1.0 12.0 ns - 7.0 11.4 1.
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74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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 levels that occur with the output load. Fig 7. enable and disable times Table 8.
PAGE 10
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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 PULSE GENERATOR VI VO RL S1 open DUT RT CL 001aad983 Test data is given in Table 9.
PAGE 11
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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 0.23 13.0 12.6 7.
PAGE 12
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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 0.65 6.6 6.
PAGE 13
74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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. A1 b 1 0.05 0.00 0.30 0.
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74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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 MM Machine Model TTL Transistor-Transistor Logic 14. Revision history Table 11.
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74AHC244; 74AHCT244 NXP Semiconductors Octal buffer/line driver; 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. Product [short] data sheet Production This document contains the product specification.
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NXP Semiconductors 74AHC244; 74AHCT244 Octal buffer/line driver; 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 1 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 Pinning . . . . .