Datasheet

TSB81BA3D, TSB81BA3DI
IEEE 1394b THREE-PORT CABLE TRANSCEIVER/ARBITER
SLLS559E − DECEMBER 2002 − REVISED JUNE 2006
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of operating conditions (unless otherwise noted)
driver
PARAMETER TEST CONDITION MIN TYP MAX UNIT
V
OD
Differential output voltage 56 Ω, See Figure 1 172 265 mV
I
DIFF
Driver difference current, TPA+, TPA−, TPB+, TPB− Drivers enabled, speed signaling off −1.05
†
1.05
†
mA
I
SP200
Common-mode speed signaling current, TPB+, TPB− S200 speed signaling enabled −4.84
‡
−2.53
‡
mA
I
SP400
Common-mode speed signaling current, TPB+, TPB− S400 speed signaling enabled −12.4
‡
−8.10
‡
mA
V
OFF
Off state differential voltage Drivers disabled, See Figure 1 20 mV
†
Limits defined as algebraic sum of TPA+ and TPA− driver currents. Limits also apply to TPB+ and TPB− algebraic sum of driver currents.
‡
Limits defined as absolute limit of each of TPB+ and TPB− driver currents.
receiver
PARAMETER TEST CONDITION MIN TYP MAX UNIT
Z
Differential impedance
Drivers disabled
4 7 kΩ
Z
ID
Differential impedance Drivers disabled
4 pF
Z
Common mode impedance
Drivers disabled
20 kΩ
Z
IC
Common-mode impedance Drivers disabled
24 pF
V
TH−R
Receiver input threshold voltage Drivers disabled −30 30 mV
V
TH−CB
Cable bias detect threshold, TPBx cable inputs Drivers disabled 0.6 1.0 V
V
TH
+ Positive arbitration comparator threshold voltage Drivers disabled 89 168 mV
V
TH
− Negative arbitration comparator threshold voltage Drivers disabled −168 −89 mV
V
TH−SP200
Speed signal threshold
TPBIAS−TPA common mode
49 131 mV
V
TH−SP400
Speed signal threshold
voltage, drivers disabled
314 396 mV
device
PARAMETER TEST CONDITION MIN TYP MAX UNIT
I
Supply current, 3.3 V
DD
See Note 2
120
mA
I
DD
Supply current, Core V
DD
See Note 2
79
mA
V
TH
Power status threshold, CPS input
†
400-kΩ resistor
†
4.7 7.5 V
V
OH
High-level output voltage, CTL0, CTL1, D0−D7, CNA,
LKON/DS2, PCLK outputs
V
DD
= 3 to 3.6 V,
I
OH
= −4 mA
2.8 V
V
OL
Low-level output voltage, CTL0, CTL1, D0−D7, CNA,
LKON/DS2, PCLK outputs
I
OL
= 4 mA 0.4 V
I
BH+
Positive peak bus holder current, D0−D7, CTL0−CTL1, LREQ
V
DD
= 3.6 V,
V
I
= 0 V to V
DD
0.05 1 mA
I
BH−
Negative peak bus holder current, D0−D7, CTL0−CTL1, LREQ
V
DD
= 3.6 V,
V
I
= 0 V to V
DD
−1.0 −0.05 mA
I
OZ
Off-state output current, CTL0, CTL1, D0−D7, LKON/DS2 I/Os V
O
= V
DD
or 0 V ±5 μA
I
IRST
Pullup current, RESETz input V
I
= 1.5 V or 0 V −90 −20 μA
V
O
TPBIAS output voltage At rated I
O
current 1.665 2.015 V
†
Measured at cable power side of resistor.
‡
This parameter applicable only when ISO low.
NOTE 2: Repeat Max Packet (1 port receiving maximum size isochronous packet—8192 bytes, sent on every isochronous interval, s800, data
value of 0xCCCCCCCCh; 2 ports repeating; all ports with beta-mode connection), V
DD3.3
= 3.3 V, V
DDCORE
= 1.95 V, T
A
= 25_C