SN55LBC976 Datasheet, PDF (6/25 Pages) Texas Instruments – 9-CHANNEL DIFFERENTIAL TRANSCEIVER

SN55LBC976
9-CHANNEL DIFFERENTIAL TRANSCEIVER
SGLS091A – JUNE 1995 – REVISED JANUARY 1997
receiver switching characteristics over recommended operating conditions (see Figure 5) (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP† MAX UNIT
tpd
Propagation delay time, high-to-low-level output (tPHL) or
low-to-high-level output (tPLH)
16
VCC = 5 V, TA = 25°C
21
36
ns
31
tsk(lim)
Skew limit, the maximum difference in propagation delay times
between any two drivers on any two devices
VCC = 5 V, See Note 2
12
ns
9
tsk(p) Pulse skew ( | tPHL – tPLH| )
TA = – 55°C
2
6 ns
10 ns
tt
Transition time ( tr or tf )
† _{All typical values are at VCC = 5 V, TA = 25°C.}
NOTE 2: This specification applies to any 5°C band within the operating temperature range.
3
ns
transceiver switching characteristics over recommended operating conditions
PARAMETER
ten(RXL) Enable time, transmit-to-receive to low-level output
ten(RXH) Enable time, transmit-to-receive to high-level output
ten(TXL) Enable time, receive-to-transmit to low-level output
ten(TXH) Enable time, receive-to-transmit to high-level output
tsu
Setup time, CDE0, CDE1, CDE2, BSR, or CRE to active input(s) or output(s)
* This parameter is not production tested.
TEST CONDITIONS
See Figure 6
MIN
180*
MAX
180*
180*
110*
110*
UNIT
ns
ns
ns
ns
ns
thermal characteristics
R_θJA
R_θJC
PARAMETER
Junction-to-free-air thermal resistance
Junction-to-case thermal resistance
TEST CONDITIONS
Board mounted, No air flow
MIN TYP MAX UNIT
95.4
°C/ W
5.67
°C/ W
PARAMETER MEASUREMENT INFORMATION
– IIH
or
VIH
– IIL
or
VIL
B+
A
B–
CDE0 at 5 V,
DE/RE at 5 V,
BSR at 0 V
Others Open
(see Note A)
VOD
VO,
VOH,
or
VOL
– IOH,
– IOL,
– IOS,
or
– IOZ
NOTE A: For the IOZ test, the BSR input is at 5 V and all others are at 0 V.
Figure 1. Driver Test Circuit and Input Conditions
6
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