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PDF 74ALVCH16245 Data sheet ( Hoja de datos )
| Número de pieza | 74ALVCH16245 | |
| Descripción | 16-bit transceiver | |
| Fabricantes | NXP Semiconductors | |
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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.
1 page  
Philips Semiconductors
6. Pinning information
6.1 Pinning
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
1DIR 1
1B0 2
1B1 3
GND 4
1B2 5
1B3 6
VCC 7
1B4 8
1B5 9
GND 10
1B6 11
1B7 12
2B0 13
2B1 14
GND 15
2B2 16
2B3 17
VCC 18
2B4 19
2B5 20
GND 21
2B6 22
2B7 23
2DIR 24
Fig 5. Pin configuration.
16245
48 1OE
47 1A0
46 1A1
45 GND
44 1A2
43 1A3
42 VCC
41 1A4
40 1A5
39 GND
38 1A6
37 1A7
36 2A0
35 2A1
34 GND
33 2A2
32 2A3
31 VCC
30 2A4
29 2A5
28 GND
27 2A6
26 2A7
25 2OE
001aaa791
6.2 Pin description
Table 3:
Pin
1
2
3
4
5
6
7
8
9
10
11
Pin description
Symbol
1DIR
1B0
1B1
GND
1B2
1B3
VCC
1B4
1B5
GND
1B6
Description
direction control input
data output or input
data output or input
ground (0 V)
data output or input
data output or input
positive supply voltage
data output or input
data output or input
ground (0 V)
data output or input
9397 750 13117
Product data sheet
Rev. 03 — 12 May 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
5 of 17
5 Page 
Philips Semiconductors
12. Waveforms
74ALVC16245; 74ALVCH16245
16-bit bus transceiver with direction pin; 3-state
nAn, nBn
input
VI
GND
VOH
nBn, nAn
output
VOL
tPHL
VM
VM
tPLH
001aaa792
Fig 6.
Measurement points are given in Table 9.
VOL and VOH are typical output voltage drop that occur with the output load.
Input (nAn, nBn) to output (nBn, nAn) propagation delay times.
Table 9: Measurement points
Supply voltage
Input
VCC
< 2.7 V
≥ 2.7 V
VM
0.5 × VCC
1.5 V
Output
VM
0.5 × VCC
1.5 V
9397 750 13117
Product data sheet
nOE input
VI
GND
VCC
Qn output
LOW- to - OFF
OFF- to - LOW
VOL
VOH
Qn output
HIGH- to - OFF
OFF- to - HIGH
GND
VM
t PLZ
VM
t PZL
t PHZ
VX
VY
outputs
enabled
VM
t PZH
VM
outputs
disabled
outputs
enabled
001aaa793
Fig 7.
Measurement points are given in Table 10.
VOL and VOH are typical output voltage drop that occur with the output load.
3-state enable and disable times.
Table 10: Measurement points
Supply voltage Input
VCC
< 2.7 V
≥ 2.7 V
VM
0.5 × VCC
1.5 V
Output
VM
0.5 × VCC
1.5 V
Rev. 03 — 12 May 2004
VX
VOL + 0.15 V
VOL + 0.3 V
VY
VOH − 0.15 V
VOH − 0.3 V
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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