74ALVC162836ADGG Просмотр технического описания (PDF) - Philips Electronics

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74ALVC162836ADGG

20-bit registered driver with inverted register enable and 30Ω termination resistors (3-State)

Philips Electronics 

Philips Semiconductors

20-bit registered driver with inverted register enable

and 30Ω termination resistors (3-State)

Product specification

74ALVC162836A

FEATURES

• Wide supply voltage range of 1.2 V to 3.6 V

• Complies with JEDEC standard no. 8-1A.

• CMOS low power consumption

• Direct interface with TTL levels

• Current drive ± 12 mA at 3.0 V

• MULTIBYTETM flow-through standard pin-out architecture

• Low inductance multiple VCC and GND pins for minimum noise

and ground bounce

• Output drive capability 50 Ω transmission lines @ 85°C

• Integrated 30 W termination resistors

• Diode clamps to VCC and GND on all inputs

• Input diodes to accommodate strong drivers

DESCRIPTION

The 74ALVC162836A is an 20-bit universal bus driver. Data flow is

controlled by output enable (OE), latch enable (LE) and clock inputs

(CP).

When LE is HIGH, the A to Y data flow is transparent. When LE is

HIGH and CP is held at LOW or HIGH, the data is latched; on the

LOW to HIGH transient of CP the A-data is stored in the

latch/flip-flop.

The 74ALVC162836A is designed with 30 W_series resistors in both

HIGH or LOW output stages.

When OE is LOW the outputs are active. When OE is HIGH, the

outputs go to the high impedance OFF-state. Operation of the OE

input does not affect the state of the latch/flip -flop.

To ensure the high-impedance state during power up or power

down, OE should be tied to VCC through a pullup resistor; the

minimum value of the resistor is determined by the current-sinking

capability of the driver.

PIN CONFIGURATION

OE 1

Y1 2

Y2 3

GND 4

Y3 5

Y4 6

VCC 7

Y5 8

Y6 9

Y7 10

GND 11

Y8 12

Y9 13

Y10 14

Y11 15

Y12 16

Y13 17

GND 18

Y14 19

Y15 20

Y16 21

VCC 22

Y17 23

Y18 24

GND 25

Y19 26

Y20 27

NC 28

56 CP

55 A1

54 A2

53 GND

52 A3

51 A4

50 VCC

49 A5

48 A6

47 A7

46 GND

45 A8

44 A9

43 A10

42 A11

41 A12

40 A13

39 GND

38 A14

37 A15

36 A16

35 VCC

34 A17

33 A18

32 GND

31 A19

30 A20

29 LE

SH00197

QUICK REFERENCE DATA

GND = 0 V; Tamb = 25°C; tr = tf ≤ 2.5ns

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

Propagation delay

tPHL/tPLH

An to Yn;

LE to Yn;

VCC = 3.3 V, CL = 50 pF

2.9

3.5

CP to Yn

3.3

fmax

Maximum clock frequency

VCC = 3.3 V, CL = 50 pF

240

CI

Input capacitance

4.0

CI/O

Input/Output capacitance

8.0

CPD

Power dissipation capacitance per buffer

VI = GND to VCC1

transparent mode

Output enabled

10

Output disabled

3

Clocked mode

Output enabled

21

Output disabled

15

NOTES:

1. CPD is used to determine the dynamic power dissipation (PD in µW):

PD = CPD × VCC2 × fi + S (CL × VCC2 × fo) where: fi = input frequency in MHz; CL = output load capacitance in pF;

fo = output frequency in MHz; VCC = supply voltage in V; S (CL × VCC2 × fo) = sum of outputs.

UNIT

ns

MHz

pF

pF

pF

2000 Jun 20

2

853–2195 23931

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