HC-5524 Datasheet, PDF (4/9 Pages) Intersil Corporation – EIA/ITU 24V PABX SLIC with 25mA Loop Feed

HC-5524
Electrical Specifications Typical Parameters are at T_A = 25^oC, V_B+ = 5V, V_B- = -24V, AG = DG = BG = 0V. Min-Max Parameters are
Over Operating Positive and Negative Battery Voltages and Over the Operating Temperature Range. All
Parameters are Specified at 600W 2-Wire Terminating Impedance, Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
Power Dissipation On Hook
I_B+
I_B-
I_B+
I_B-
UNCOMMITTED OP AMP PARAMETERS
Relay Drivers Off
∞ V_B+ = 5.25V, V_B- = -28V, R_LOOP =
∞ V_B+ = 5.25V, V_B- = -28V, R_LOOP =
V_B+ = 5V, V_B- = -24V, R_LOOP = 600Ω
V_B+ = 5V, V_B- = -24V, R_LOOP = 600Ω
-
60
-
mW
-
-
4
mA
-4
-
-
mA
-
3
6
mA
-28
-24
-
mA
Input Offset Voltage
-
±5
-
mV
Input Offset Current
-
±10
-
nA
Differential Input Resistance
(Note 3)
-
1
-
MΩ
Output Voltage Swing
Small Signal GBW
R_L = 10kΩ
(Note 3)
-
±3
-
V_P-P
-
1
-
MHz
NOTE:
3. These parameters are controlled by design or process parameters and are not directly tested. These parameters are characterized upon initial
design release, upon design changes which would affect these characteristics, and at intervals to assure product quality and specification com-
pliance.
Pin Descriptions
SOIC
1
2
3
4
5
PLCC
2
3
4
8
9
SYMBOL
DESCRIPTION
AG
Analog Ground - To be connected to zero potential. Serves as a reference for the transmit output and receive
(Note 4) input terminals.
V_B+
Positive Voltage Source - Most Positive Supply.
C₁
Capacitor #C₁ - An external capacitor to be connected between this terminal and analog ground. Required for
proper operation of the loop current limiting function.
F1
Function Address #1 - A TTL and CMOS compatible input used with F0 function address line to externally se-
lect logic functions. The three selectable functions are mutually exclusive. See Truth Table on front page. F1
should be toggled high after power is applied.
F0
Function Address #0 - A TTL and CMOS compatible input used with F1 function address line to externally se-
lect logic functions. The three selectable functions are mutually exclusive. See Truth Table on front page.
6
10
RS
Ring Synchronization Input - A TTL - compatible clock input. The clock is arranged such that a positive pulse
(50µs - 500µs) occurs on the zero crossing of the ring voltage source, as it appears at the RFS terminal. For
Tip side injected systems, the RS pulse should occur on the negative going zero crossing and for Ring injected
systems, on the positive going zero crossing. This ensures that the ring delay activates and deactivates when
the instantaneous ring voltage is near zero. If synchronization is not required, the pin should be tied to +5V.
7
11
SHD Switch Hook Detection - An active low LS TTL compatible logic output. A line supervisory output.
8
12
GKD Ground Key Detection - An active low LS TTL compatible logic output. A line supervisory output.
9
13
TST
A TTL logic input. A low on this pin will set a latch and keep the SLIC in a power down mode until the proper
F1, F0 state is set and will keep ALM low. See Truth Table on front page.
10
17
ALM
A LS TTL compatible active low output which responds to the thermal detector circuit when a safe operating
die temperature has been exceeded. When TST is forced low by an external control signal, ALM is latched low
until the proper F1, F0 state and TST input is brought high. The ALM can be tied directly to the TST pin to
power down the part when a thermal fault is detected and then reset with F0, F1. See Truth Table on front page.
It is possible to ignore transient thermal overload conditions in the SLIC by delaying the response to the TST
pin from the ALM. Care must be exercised in attempting this as continued thermal overstress may reduce com-
ponent life.
11
18
I_LIMIT Loop Current Limit - Voltage on this pin sets the short loop current limiting conditions using a resistive voltage
divider.
12
19
OUT1 The analog output of the spare operational amplifier.
13
20
-IN1
The inverting analog input of the spare operational amplifier.
4