Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsLogic ICsLogic IC - Receiver, transceiver TSSOP 20

1. General description

The 74HC245; 74HCT245 is a high-speed Si-gate CMOS device and is pin compatible

with Low-Power Schottky TTL (LSTTL).

The 74HC245; 74HCT245 is an octal transceiver featuring non-inverting 3-state bus

compatible outputs in both send and receive directions. The 74HC245; 74HCT245

features an output enable input (OE) for easy cascading and a send/receive input (DIR)

for direction control. OE controls the outputs so that the buses are effectively isolated.

The 74HC245; 74HCT245 is similar to the 74HC640; 74HCT640 but has true

(non-inverting) outputs.

2. Features

■ Octal bidirectional bus interface

■ Non-inverting 3-state outputs

■ Multiple package options

■ Complies with JEDEC standard no. 7A

■ ESD protection:

◆ HBM EIA/JESD22-A114-B exceeds 2000 V

◆ MM EIA/JESD22-A115-A exceeds 200 V

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

3. Quick reference data

74HC245; 74HCT245

Octal bus tranceiver; 3-state

Rev. 03 — 31 January 2005 Product data sheet

Table 1: Quick reference data

GND = 0 V; T

amb

=25

C; t

= 6 ns.

Symbol Parameter Conditions Min Typ Max Unit

Type 74HC245

PHL

, t

PLH

propagation delay

An to Bn or Bn to An

=15pF;

=5V

-7-ns

input capacitance - 3.5 - pF

I/O

input/output capacitance - 10 - pF

power dissipation

capacitance per

transceiver

= GND to V

[1]

-30-pF

Type 74HCT245

PHL

, t

PLH

propagation delay

An to Bn or Bn to An

=15pF;

=5V

-10-ns

Summary of content (22 pages)

PAGE 1
74HC245; 74HCT245 Octal bus tranceiver; 3-state Rev. 03 — 31 January 2005 Product data sheet 1. General description The 74HC245; 74HCT245 is a high-speed Si-gate CMOS device and is pin compatible with Low-Power Schottky TTL (LSTTL). The 74HC245; 74HCT245 is an octal transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. The 74HC245; 74HCT245 features an output enable input (OE) for easy cascading and a send/receive input (DIR) for direction control.
PAGE 2
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 1: Quick reference data …continued GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns. Symbol Parameter CI input capacitance CI/O input/output capacitance power dissipation capacitance per transceiver CPD [1] Conditions VI = GND to VCC − 1.5 V [1] Min Typ Max Unit - 3.
PAGE 3
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 5. Functional diagram 1 DIR OE 2 B0 3 16 15 14 A5 13 A6 3EN1 3EN2 2 18 3 17 4 16 5 15 6 14 7 13 8 12 9 B6 9 2 A4 B5 8 G3 17 A3 B4 7 1 1 B3 6 19 A2 B2 5 18 A1 B1 4 19 A0 11 mna175 12 A7 B7 11 mna174 Fig 1. Logic symbol Fig 2. IEC logic symbol 9397 750 14502 Product data sheet © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Rev.
PAGE 4
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 6. Pinning information 1 terminal 1 index area 1 20 VCC A0 2 19 OE A1 3 18 B0 A2 4 17 B1 A3 5 16 B2 245 A0 2 19 OE A1 3 18 B0 A2 4 17 B1 A3 5 A4 6 A5 7 6 15 B3 A6 8 A5 7 14 B4 A7 9 A6 8 13 B5 A7 9 12 B6 GND 10 11 B7 15 B3 14 B4 GND(1) 13 B5 12 B6 GND 10 A4 001aac431 16 B2 245 B7 11 DIR 20 VCC DIR 6.
PAGE 5
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 3: Pin description …continued Symbol Pin Description B1 17 data input/output B0 18 data input/output OE 19 output enable input (active LOW) VCC 20 supply voltage 7. Functional description 7.
PAGE 6
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 9. Recommended operating conditions Table 6: Recommended operating conditions Symbol Parameter Conditions Min Typ Max Unit Type 74HC245 VCC supply voltage 2.0 5.0 6.0 V VI input voltage 0 - VCC V VO output voltage 0 - VCC V tr, tf input rise and fall times VCC = 2.0 V - - 1000 ns VCC = 4.5 V - 6.0 500 ns VCC = 6.
PAGE 7
4HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 7: Static characteristics type 74HC245 …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Typ Max Unit VOL LOW-level output voltage VI = VIH or VIL IO = 20 µA; VCC = 2.0 V - 0 0.1 V IO = 20 µA; VCC = 4.5 V - 0 0.1 V IO = 20 µA; VCC = 6.0 V - 0 0.1 V IO = 6.0 mA; VCC = 4.5 V - 0.15 0.26 V IO = 7.8 mA; VCC = 6.0 V - 0.16 0.
PAGE 8
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 7: Static characteristics type 74HC245 …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Typ Max Unit VIL LOW-level input voltage VCC = 2.0 V - - 0.5 V VCC = 4.5 V - - 1.35 V VCC = 6.0 V - - 1.8 V VOH VOL HIGH-level output voltage LOW-level output voltage VI = VIH or VIL - IO = −20 µA; VCC = 2.0 V 1.
PAGE 9
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 8: Static characteristics type 74HCT245 …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Typ Max Unit ∆ICC additional quiescent supply current per input pin VI = VCC − 2.1 V; other inputs at VI = VCC or GND; VCC = 4.5 V to 5.
PAGE 10
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 8: Static characteristics type 74HCT245 …continued At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Typ Max Unit ICC quiescent supply current VI = VCC or GND; IO = 0 A; VCC = 5.5 V - - 160 µA ∆ICC additional quiescent supply current per input pin VI = VCC − 2.1 V; other inputs at VI = VCC or GND; VCC = 4.5 V to 5.
PAGE 11
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 9: Dynamic characteristics type 74HC245 …continued GND = 0 V; test circuit see Figure 7. Symbol Parameter Conditions tPZH, tPZL 3-state output enable time OE to An or OE to Bn see Figure 6 tPHZ, tPLZ tTHL, tTLH Min Typ Max Unit VCC = 2.0 V - - 190 ns VCC = 4.5 V - - 38 ns VCC = 6.0 V - - 33 ns VCC = 2.0 V - - 190 ns VCC = 4.5 V - - 38 ns VCC = 6.0 V - - 33 ns VCC = 2.
PAGE 12
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state Table 10: Dynamic characteristics type 74HCT245 GND = 0 V; test circuit see Figure 7. Symbol Parameter Conditions Min Typ Max Unit - 12 22 ns VCC = 5.0 V; CL = 15 pF - 10 - ns Tamb = 25 °C tPHL, tPLH propagation delay An to Bn or Bn see Figure 5 to An VCC = 4.5 V tPZH, tPZL 3-state output enable time OE to An or OE to Bn VCC = 4.
PAGE 13
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 12. Waveforms VI VM An, Bn input VM GND t PHL t PLH VOH 90 % VM VM Bn, An output 10 % VOL t THL t TLH 001aac433 Measurement points are given in Table 11. VOL and VOH are typical voltage output drop that occur with the output load. Fig 5.
PAGE 14
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state VCC VCC PULSE GENERATOR VI VO RL = 1 kΩ open D.U.T RT CL 50 pF mgk563 Test data is given in Table 12. 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 resistor. Fig 7.
PAGE 15
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 13. Package outline DIP20: plastic dual in-line package; 20 leads (300 mil) SOT146-1 ME seating plane D A2 A A1 L c e Z b1 w M (e 1) b MH 11 20 pin 1 index E 1 10 0 5 10 mm scale DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT A max. A1 min. A2 max. b b1 c mm 4.2 0.51 3.2 1.73 1.30 0.53 0.38 0.36 0.23 26.92 26.54 inches 0.17 0.02 0.13 0.068 0.051 0.021 0.015 0.
PAGE 16
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 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 7.6 7.4 1.27 10.65 10.
PAGE 17
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state SSOP20: plastic shrink small outline package; 20 leads; body width 5.3 mm D SOT339-1 E A X c HE y v M A Z 20 11 Q A2 A (A 3) A1 pin 1 index θ Lp L 1 10 w M bp e detail X 0 2.5 5 mm scale DIMENSIONS (mm are the original dimensions) UNIT A max. A1 A2 A3 bp c D (1) E (1) e HE L Lp Q v w y Z (1) θ mm 2 0.21 0.05 1.80 1.65 0.25 0.38 0.25 0.20 0.09 7.4 7.0 5.4 5.2 0.65 7.9 7.6 1.25 1.
PAGE 18
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 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 19
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 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 mm A(1) max. A1 b 1 0.05 0.00 0.30 0.
PAGE 20
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 14. Revision history Table 13: Revision history Document ID Release date Data sheet status Change notice Doc.
PAGE 21
74HC245; 74HCT245 Philips Semiconductors Octal bus tranceiver; 3-state 15. Data sheet status Level Data sheet status [1] Product status [2] [3] Definition I Objective data Development This data sheet contains data from the objective specification for product development. Philips Semiconductors reserves the right to change the specification in any manner without notice. II Preliminary data Qualification This data sheet contains data from the preliminary specification.
PAGE 22
Philips Semiconductors 74HC245; 74HCT245 Octal bus tranceiver; 3-state 19. Contents 1 2 3 4 5 6 6.1 6.2 7 7.1 8 9 10 11 12 13 14 15 16 17 18 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Quick reference data . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 3 Pinning information . . . . . . .