參數(shù)資料
型號: SN74AVCH2T45YEPR
廠商: TEXAS INSTRUMENTS INC
元件分類: 總線收發(fā)器
英文描述: AVC SERIES, 2-BIT TRANSCEIVER, TRUE OUTPUT, PBGA8
封裝: DSBGA-8
文件頁數(shù): 22/22頁
文件大?。?/td> 365K
代理商: SN74AVCH2T45YEPR
www.ti.com
Operating Characteristics
POWER-UP CONSIDERATIONS
SN74AVCH2T45
DUAL-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES582D – JULY 2004 – REVISED AUGUST 2005
T
A = 25°C
VCCA =
TEST
VCCB = 1.2 V
VCCB = 1.5 V
VCCB = 1.8 V
VCCB = 2.5 V
VCCB = 3.3 V
PARAMETER
UNIT
CONDITIONS
TYP
A-port input,
3
4
CL = 0,
B-port output
CpdA(1)
f = 10 MHz,
pF
B-port input,
tr = tf = 1 ns
13
14
15
A-port output
A-port input,
13
14
15
CL = 0,
B-port output
CpdB(1)
f = 10 MHz,
pF
B-port input,
tr = tf = 1 ns
3
4
A-port output
(1)
Power dissipation capacitance per transceiver
A proper power-up sequence always should be followed to avoid excessive supply current, bus contention,
oscillations, or other anomalies. To guard against such power-up problems, take the following precautions:
1. Connect ground before any supply voltage is applied.
2. Power up VCCA.
3. VCCB can be ramped up along with or after VCCA.
Table 1. Typical Total Static Power Consumption (ICCA + ICCB)
VCCA
VCCB
UNIT
0 V
1.2 V
1.5 V
1.8 V
2.5 V
3.3 V
0 V
0
<0.5
1.2 V
<0.5
<1
1
1.5 V
<0.5
<1
1
A
1.8 V
<0.5
<1
2.5 V
<0.5
1
<1
3.3 V
<0.5
1
<1
9
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