PDF《SN54ABTR2245, SN74ABTR2245》

2 V C10 C10 C10 ?A IOZPU§ VCC =

0 to 2.1 V, VO = 0.5 V to 2.7 V, OE = X ±50 ±50 ±50 ?A IOZPD§ VCC = 2.1 V to 0, VO = 0.5 V to 2.7 V, OE = X ±50 ±50 ±50 ?A Ioff VCC = 0, VI or VO ≤ 4.5 V ±100 ±100 ?A ICEX VCC = 5.5 V, VO = 5.5 V Outputs high

50 50

50 ?A IO? VCC = 5.5 V, VO = 2.5 V C25 C100 C25 C100 C25 C100 mA VCC = 5.5 V, Outputs high

1 250

250 250 ?A ICC A or B ports VCC = 5.5 V, IO = 0, Outputs low

24 32

32 32 mA VI = VCC or GND Outputs disabled 0.5

250 250

250 ?A Data inputs VCC = 5.5 V, One input at 3.4 V, Outputs enabled 1.5 1.5 1.5 ?ICC# Data inputs , Other inputs at VCC or GND Outputs disabled 0.05 0.05 0.05 mA Control inputs VCC = 5.5 V, One input at 3.4 V, Other inputs at VCC or GND 1.5 1.5 1.5 Ci VI = 2.5 V or 0.5 V

3 pF Cio VO = 2.5 V or 0.5 V

6 pF * On products compliant to MIL-PRFC38535, this parameter does not apply. ? All typical values are at VCC =

5 V. ? The parameters IOZH and IOZL include the input leakage current. § This parameter is characterized but not production tested. ? Not more than one output should be tested at a time, and the duration of the test should not exceed one second. # This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND. PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. SN54ABTR2245, SN74ABTR2245 OCTAL TRANSCEIVERS AND LINE/MEMORY DRIVERS WITH 3-STATE OUTPUTS SCBS680A C MARCH

1997 C REVISED MAY

1997 6 POST OFFICE BOX

655303 ? DALLAS, TEXAS

75265 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL =

50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC =

5 V, TA = 25°C SN54ABTR2245 SN74ABTR2245 UNIT (INPUT) (OUTPUT) MIN TYP MAX MIN MAX MIN MAX tPLH A or B B or A

1 2.5 3.4

1 4

1 3.8 ns tPHL A or B B or A

1 3.2 4.2

1 4.6

1 4.5 ns tPZH OE A or B 1.5 3.6 4.9 1.5 6.3 1.5 6.1 ns tPZL OE A or B 1.5 3.9 5.3 1.5 6.6 1.5 6.3 ns tPHZ OE A or B 1.5 3.6 4.7 1.5 5.5 1.5 5.3 ns tPLZ OE A or B 1.5 3.3 4.4 1.5 4.9 1.5 4.8 ns PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. SN54ABTR2245, SN74ABTR2245 OCTAL TRANSCEIVERS AND LINE/MEMORY DRIVERS WITH 3-STATE OUTPUTS SCBS680A C MARCH

1997 C REVISED MAY

1997 7 POST OFFICE BOX

655303 ? DALLAS, TEXAS

75265 PARAMETER MEASUREMENT INFORMATION 1.5 V th tsu From Output Under Test CL =

50 pF (see Note A) LOAD CIRCUIT S1

7 V Open GND

500 ?

500 ? Data Input Timing Input 1.5 V

3 V

0 V 1.5 V 1.5 V

3 V

0 V

3 V

0 V 1.5 V 1.5 V tw Input VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS VOLTAGE WAVEFORMS PULSE DURATION tPLH tPHL tPHL tPLH VOH VOH VOL VOL 1.5 V 1.5 V

3 V

0 V 1.5 V 1.5 V Input 1.5 V Output Control Output Waveform

1 S1 at

7 V (see Note B) Output Waveform

2 S1 at Open (see Note B) VOL VOH tPZL tPZH tPLZ tPHZ 1.5 V 1.5 V 3.5 V

0 V 1.5 V VOL + 0.3 V 1.5 V VOH C 0.3 V ≈

0 V

3 V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING Output Output tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open

7 V Open TEST S1 NOTES: A. CL includes probe and jig capacitance. B. Waveform