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Teilenummer | 74ALVCH16245 |
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Beschreibung | 16-bit transceiver | |
Hersteller | NXP Semiconductors | |
Logo | ||
Gesamt 17 Seiten 74ALVC16245; 74ALVCH16245
16-bit transceiver with direction pin; 3-state
Rev. 03 — 12 May 2004
Product data sheet
1. General description
The 74ALVC16245; 74ALVCH16245 is a 16-bit transceiver featuring non-inverting 3-state
bus compatible outputs in both send and receive directions.
The 74ALVC16245; 74ALVCH16245 features two output enable inputs (pins nOE) for
easy cascading and two send or receive inputs (pins nDIR) for direction control. Pins nOE
control the outputs so that the buses are effectively isolated. This device can be used as
two 8-bit transceivers or one 16-bit transceiver.
The 74ALVCH16245 has an active bushold circuitry which is provided to hold unused or
floating data inputs at a valid logic level. This feature eliminates the need for external
pull-up or pull-down resistors.
2. Features
s Wide supply voltage range from 1.2 V to 3.6 V
s Complies with JEDEC standard JESD8-B
s CMOS low power consumption
s MULTIBYTE flow-through standard pin-out architecture
s Low inductance multiple VCC and GND pins for minimize noise and ground bounce
s Direct interface with TTL levels
s All data inputs have bushold (74ALVCH16245 only)
s Output drive capability 50 Ω transmission lines at 85 °C
s Current drive ±24 mA at VCC = 3.0 V.
Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
Table 3:
Pin
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin description …continued
Symbol
Description
1B7 data output or input
2B0 data output or input
2B1 data output or input
GND
ground (0 V)
2B2 data output or input
2B3 data output or input
VCC positive supply voltage
2B4 data output or input
2B5 data output or input
GND
ground (0 V)
2B6 data output or input
2B7 data output or input
2DIR
direction control input
2OE
output enable input (active LOW)
2A7 data input or output
2A6 data input or output
GND
ground (0 V)
2A5 data input or output
2A4 data input or output
VCC positive supply voltage
2A3 data input or output
2A2 data input or output
GND
ground (0 V)
2A1 data input or output
2A0 data input or output
1A7 data input or output
1A6 data input or output
GND
ground (0 V)
1A5 data input or output
1A4 data input or output
VCC positive supply voltage
1A3 data input or output
1A2 data input or output
GND
ground (0 V)
1A1 data input or output
1A0 data input or output
1OE
output enable input (active LOW)
9397 750 13117
Product data sheet
Rev. 03 — 12 May 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
6 of 17
6 Page Philips Semiconductors
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
VCC
PULSE
GENERATOR
VI
D.U.T.
VO
RT
VEXT
RL
CL RL
mna616
Fig 8.
Test data is given in Table 11.
Definitions test circuit:
RL = Load resistor.
CL = Load capacitance includes jig and probe capacitance.
RT = Termination resistance should be equal to Zo of pulse generator.
Load circuitry for switching times.
Table 11: Test data
Supply
voltage
Input
VCC
< 2.7 V
2.7 V − 3.6 V
VI
VCC
2.7 V
tr, tf
2.0 ns
2.5 ns
Load
VEXT
CL
30 pF
50 pF
RL
500 Ω
500 Ω
tPLH, tPHL
open
open
tPHZ, tPZH
GND
GND
tPLZ, tPZL
2 × VCC
2 × VCC
9397 750 13117
Product data sheet
Rev. 03 — 12 May 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
12 of 17
12 Page | ||
Seiten | Gesamt 17 Seiten | |
PDF Download | [ 74ALVCH16245 Schematic.PDF ] |
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