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參數(shù)資料
| 型號： | 935263932518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | LVC/LCX/Z SERIES, 32 1-BIT TRANSCEIVER, TRUE OUTPUT, PBGA96 |
| 封裝： | 13.50 X 5.50 X 1.05 MM, PLASTIC, SOT-536-1, LFBGA-96 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大小： | 87K |
| 代理商： | 935263932518 |
1999 Sep 01
2
Philips Semiconductors
Product specication
32-bit bus transceiver with direction pin; 30
series termination resistors; 5 V tolerant; 3-state
74LVC322245A;
74LVCH322245A
FEATURES
5 V tolerant inputs/outputs for interfacing with 5 V logic
Wide supply voltage range of 1.2 to 3.6 V
Complies with JEDEC standard no. 8-1A
CMOS low power consumption
MULTIBYTE flow-trough standard pin-out architecture
Low inductance multiple power and ground pins for
minimum noise and ground bounce
Direct interface with TTL levels
Bus hold on data inputs (74LVCH322245A only)
Integrated 30 termination resistors
Typical output ground bounce voltage:
VOLP <0.8 V at VCC = 3.3 V; Tamb =25 °C
Typical output VOH undershoot voltage:
VOHV >2VatVCC = 3.3 V; Tamb =25 °C
Power-off disabled outputs, permitting live insertion
Plastic fine-pitch ball grid array package.
DESCRIPTION
The 74LVC(H)322245A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most
advanced CMOS compatible TTL families. Inputs can be
driven from either 3.3 or 5 V devices. In 3-state operation,
outputs can handle 5 V. These features allow the use of
these devices in a mixed 3.3 and 5 V environment.
The 74LVC(H)322245A is a 32-bit transceiver featuring
non-inverting 3-state bus compatible outputs in both send
and receive directions. The 74LVC(H)322245A features
two output enable (nOE) inputs for easy cascading and
two send or receive (nDIR) inputs for direction control.
nOE controls the outputs so that the buses are effectively
isolated. The 74LVC(H)322245A is designed with 30
series termination resistors in both HIGH and LOW output
stages to reduce line noise.
To ensure the high-impedance state during power-up or
power-down, input nOE should be tied to VCC through a
pull-up resistor; the minimum value of the resistor is
determined by the current-sinking capability of the driver.
The 74LVCH322245A bus hold data inputs eliminates the
need for external pull-up resistors to hold unused or
floating data inputs at a valid logic level (see Fig.2).
QUICK REFERENCE DATA
Ground = 0 V; Tamb =25 °C; tr =tf ≤ 2.5 ns.
Note
1. CPD is used to determine the dynamic power dissipation (PD in W).
PD =CPD × VCC2 × fi + Σ(CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in Volts;
Σ(CL × VCC2 × fo) = sum of the outputs.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
tPHL/tPLH
propagation delay
nAn to nBn;nBn to nAn
CL = 50 pF; VCC = 3.3 V
3.3
ns
CI
input capacitance
5.0
pF
CI/O
input/output capacitance
10
pF
CPD
power dissipation capacitance per
buffer
VI = GND to VCC; note 1
28
pF
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