Z0292212VSCR3910 Zilog, Z0292212VSCR3910 Datasheet - Page 2

• Manufacturer Part Number: Z0292212VSCR3910
• Description: IC MODEM DATA PUMP/AFE 44-PLCC
• Manufacturer: Zilog

Specifications of Z0292212VSCR3910

• Data Format: V.21, V.22, V.23, V.29, Bell 103, Bell 212A
• Baud Rates: 9.6k
• Interface: Parallel/Serial
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 44-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

TM
The Z02922 TransPro
is a synchronous single-chip modem solution that enables construction of either a
V.22bis modem capable of 2400 bps full-duplex, or a 9600 bps half- duplex over dial-up lines. The Z02922
is specifically designed for use in embedded modem applications where space, performance, and low
power consumption are key requirements.
The Z02922 TransPro includes a Quick Connect handshake option that allows the user to make handshakes
in 50 milliseconds or less. This feature is especially useful in transaction processing applications such as
credit card terminals and network access controllers, where a small amount of data is transmitted.
TM
Operating over the Public Switched Telephone Network (PSTN), the Z02922 TransPro
meets the
modem standards for V.29, V.22bis, V.22, V.23, V.21, Bell 212A, and Bell 103.
The Z02922 includes automatic handshakes, and also includes manual control over handshake timings.
Manual handshake control allows the user to develop handshakes for specific requirements, such as for
some point of sale equipment that includes custom handshakes.
A typical modem application can be created by simply adding a control microprocessor (Host), phone line
interface, and DTE interface (see Figure 1).
The Z02922 TransPro performs HDLC framing at all speeds. This capability eliminates the requirement
for an external Serial Input/Output (SIO) device for Data Terminal Equipment (DTE) in products
incorporating error control.
All modulation, demodulation, filtering, A/D and D/A conversion functions for transmit and receive are
provided on-chip. Automatic and selectable compromise equalizers are included to optimize performance
over a wide range of line types.
The Z02922 device compensates for a wide variety of adverse line conditions by using a combination of
fixed link, fixed cable, and adaptive equalizers.
The Z02922 provides comprehensive selectable and programmable tone generation and detection.
All digital I/O signals are TTL compatible. The parallel interface is compatible with standard 8-bit
microprocessors, allowing direct access to eight I/O registers and indirect access to the modem RAM.
The RAM access capability allows the Host to retrieve diagnostic data, modem/line status and control data,
and set programmable coefficients. The serial interface is used for data transfer. All control and status
information is transferred by means of the parallel interface.
The Z02922 transmit drivers and receive amplifiers can be connected directly to a Data Access
Arrangement (DAA) by means of a transformer. Completing this connection reduces the external circuits
to a minimum.
In addition, the Z02922 offers further system level savings by providing built-in filters for both the
Transmitter Analog Output and the Receiver Analog Input, thus eliminating the requirement for external
filtering components.
The Z02922 device operates on a single +5 VDC power supply. During periods of no traffic, the Host can
place the modem into
mode, reducing power consumption to less than 1 percent of full load power.