SN74AS856 Datasheet, PDF (7/9 Pages) Texas Instruments – 8-BIT UNIVERSAL TRANSCEIVER PORT CONTROLLERS

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SN54AS856, SN74AS856
8ĆBIT UNIVERSAL TRANSCEIVER PORT CONTROLLERS
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SDAS032A − DECEMBER 1983 − REVISED MARCH 1985
switching characteristics (see Note 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX
SN54AS856 SN74AS856
MIN MAX MIN MAX
fmax
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Any B port
↑MODE
↓MODE ^†
CLK
CLK
Any A port
Any A or B
port
Any A or B
port
Any A or B
port
Q8
45
2
8
2 10.5
2
8.5
5
20
2
8.5
2
9.5
3
12
3
12
2
9
2
10
50
2
7
2 9.5
2 7.5
5
19
2 7.5
2
8
3
9
3
11
2 7.5
2
9
tPHZ
2
9
2
7
tPLZ
tPZH
OEA or OEB
Any A or B
port
2
12
2 9.5
2
8
2
7
tPZL
2
11
2
10
† _{The positive transition of the MODE control will cause low-level data at the A output bus or stored in Q to be invalid for 12 ns.}
NOTE 1: Load circuit and voltage waveforms are shown in Section 1.
UNIT
MHz
ns
ns
ns
ns
ns
ns
ns
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